维修售后NEWALL-DSG-DMG安装手册，标准说明书在本资料上方（或技术资料中）能下载带图的详细说明书

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维修售后NEWALL-DSG-DMG安装手册，标准说明书

以上品牌和型号的数显表都能维修：数显表被雷击坏、接错电压被烧坏、数显表显示轴跳数，显示轴不显示、显示轴精度不准、显示轴闪烁、数显表按键不灵、数显表无信号等等。

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N NEWALL MEASUREMENT SYSTEMS LTD 

DSG & DMG               Linear Encoders 

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Contents 

                        CONTENTS 

                         1.0 Technical Specification 

                               1.1   Bracketry 

                               1.2   Preparation 

                               1.3   Warnings 

                        2.0  Technical Specification 

                              2.1    Output Signals 

                              2.2    Resolution and Signal Period Options 

                              2.3    DMG - EV and EM Interface Module 

                        3.0    DSG Encoder Assembly 

                        4.0  DMG Encoder Assembly 

                        5.0    Mounting The Digital Reader Head 

                              5.1    DSG 

                              5.2    DMG 

                        6.0 Mounting The Scale 

                              6.1    DSG 

                               6.1.1 Double End Mounting 

                               6.1.2 Single End Mounting 

                               6.1.3 Scales in excess of 2.5 meters 

                              6.2    DMG Scale 

                               6.2.1 Single End Mounting 

                        7.0    Fitting The Scale Guard 

                        8.0    Cable Routing 

                        9.0    Final Check 

                        Appendix A -- Mounting the Digital Reader Head 

                        Appendix B - DSG / DMG Digital -- Scale Support Brackets 

1     Newall Measurement Systeewall Measurement Systems 

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                                                                                                                Introduction 

 1.0        INTRODUCTION 

This manual will provide connection and mounting instructions for Newall's DSG Digital and DMG Digital linear 

encoders. It is important that you read and understand this manual prior to commencing the installation. 

If, at any time, you have any questions relating to this manual or the installation, contact Newall or your local 

authorised Newall representative. 

 1.1        Bracketry 

Due to the variety of machine types and applications, it will be necessary to design, make and fit custom brackets 

for the linear encoder assembly.  If bracketry is needed make certain they are rigid enough not to allow any flexing 

or distorting while the machine is in operation.  Newall offers a variety of bracket kits to aid in the installation. 

Contact Newall or your local authorised representative for details. 

 1.2        Preparation 

Prior to beginning the installation the machine should be studied to determine where the Linear encoder(s) will be 

fitted. Appendix A shows several different methods of mounting the Reader Head along with its brackets. 

In order to reduce erroneous readers caused by machine wear, it is recommended that the Scale be fitted as close 

to the machine lead screw or axial drive shaft as possible. 

The actual overall scale length is approximay 258mm (10.1”) for DSG and 173mm (6.8") for DMG longer than 

the stated scale travel. (e.g. if the travel length is 40” (DSG) the actual overall scale length of the scale will be 50”) 

Outboard mounting of the scale support brackets will add approximay 20mm (3/4") to the effective scale travel. 

(Refer to Appendix B) 

For a more compact installation, scale travels of 300mm (12") or less may be fitted by supporting one end of the 

scale only by use of a single end mounting block.  (Refer to Figure 6.4 and 6.10) 

The moving member of the Linear Digital Encoder assembly can be either the Reader Head or the Scale. 

Cable routing from the Reader Head should be examined (See Section 8).  Each Reader Head is provided with 

either a 3.5 metre (11’) or 7 metre (22’) of armoured cable. Extension cables are available in 1 metre (3'), 2 metre 

(6'), 3.5 metre (11.5'), 5 metre (16.5') and 10 metre (32') lengths.  Contact Newall or your local authorised 

representative for details. 

 1.3        Warnings 

If for any reason the machine axis travel is greater than the actual scale travel it is recommended that 'mechanical 

stops' are fitted to the machine to avoid damage caused by over travel.  Newall will not accept responsibility for 

Scale and Reader Head damage caused by machine over travel. 

Both the Reader Head and the Scale are precision made components and it is important that they are handled 

with care.  By design the Linear Digital Encoders can withstand the rigorous harsh workshop environment. 

However, permanent damage can occur through bending or severe impact. 

It is important that the Scale be kept at least 13mm (0.5") away from any magnetic bases on indicators or magnetic 

chucks. 

                                                                                          Newall Measurement Systems               2 

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Technical Specification 

       2.0 TECHNICAL SPECIFICATIONS 

       Construction: 

                          Housing                    Aluminium  

                          Cable                      6mm (¼" ) Fully interlocked Stainless Steel conduit armour 

                                                     9-way 'D-Type' connector, Heidenhein 12 pin or 9 pin round connector 

       Dimensions (reader head): 

                DMG Digital 

                          Height                     35.0mm (1.378") 

                         Width                       75.0mm (2.953") 

                          Depth                      25.0mm (0.984") 

                         Weight                      0.640Kg (1.410lbs)          (max. inc. 3.5m cable) 

                DSG Digital 

                          Height                     53.5mm (2.106") 

                         Width                       131.0mm           (5.157") 

                          Depth                      28.5mm (1.112") 

                         Weight                      0.858Kg (1.890lbs)          (max. inc. 3.5m cable) 

       Operating Voltage:                            5 VDC ± 5% 

       Supply Voltage Fluctuation:                   Within operating voltage range 

       Maximum Power Consumption:                    80mA + line receiver requirement 

       Operating Temperature:                        0 to 55°C 

       Storage Temperature:                          -20 to 70°C 

       Outputs:                                      Differential Quadrature via RS422 compatible 

                                                     line drivers @ 5V TTL levels, 1Vpp or 11µApp. 

       Maximum Output frequency:                      1,000,000 counts/sec (1Mhz) 

       Maximum cable length:                         20m (using Newall supplied cables) 

       Required Moving Force: 

                          DMG Digital                 10N 

                          DSG Digital                20N 

       Scale Type: 

                          DMG Digital                Carbon Fibre                5.64mm OD         (0.222") 

                          DSG Digital                Stainless Steel             15.24mm OD        (0.600") 

       Environmental Conditions:                     IP67 (fully submergible) according to IEC529. 

                                                     Exceeds NEMA Type 6 

       EMC Compliance:                               BS EN 50081-2      Electromagnetic Compatibility 

                                                                        Generic Emission Standard - Industrial Environment 

                                                     BS EN 50082-2      Electromagnetic Compatibility 

                                                                        Generic Immunity Standard - Industrial Environment 

                                                     NOTE:    NEWALL MEASUREMENT SYSTEMS LIMITED RESERVES THE  

             Certificate No FM36096                  RIGHT TO CHANGE THE SPECIFICATION WITHOUT NOTICE 

3      Newall Measurement Systeewall Measurement Systems 

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                                                                                                                Output Signals 

 2.1 Out Signals 

 TTL Output Signal - Differential Quadrature 

 Newall TT Series Linear Encoders provide a differential quadrature output at RS422 TTL levels. 

 The distance between two successive edges of the combined pulse trains A and B is one measuring step (resolution). 

                                                                   Resolution 

                                     Signal Period 

EV & EM - 1Vpp & 11µApp Output Signal  

Newall EV & EM Series linear encoders provide differential sinusoidal output signals that are phase shifted by 90°, and 

can provide 1Vpp or 11µApp signal levels depending on which model is selected. 

1Vpp is available with 20μm signal period only  

11μApp is available with 20μm or 40μm signal period 

Assumes 120 Ohm termination resistor 

                                                                                                Newall Measurement Systems            4 

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       2.2 Resolution and Signal Period Option 

      Both DSG - TT and DMG - TT are available, to order with a range of pre-programmed  

      resolutions as shown below. 

       Resolution       DSG - TT                 DMG - TT 

        1µm                     √                         √ 

        2µm                     √                         √ 

        5µm                     √                         √ 

        10µm                    √                         √ 

      Both DSG - EV / EM and DMG - EV / EM are available to order with the signal periods shown below. 

       Signal Period      DSG - EV      DSG - EM      DMG - EV       DMG - EM 

            20µm              √              √             √              √ 

            40µm                             √                            √ 

      2.3 DMG - EV and EM Interface Module 

      When DMG-EV or DMG-EM linear encoders are supplied, an interface module is included 

      that provides 1Vpp or 11μApp output signals.  

      1Vpp SVV Interface module (Part Number 600-83640) 

      11μApp SVM Interface module (Part Number 600-83650) 

5     Newall Measurement Systeewall Measurement Systems 

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                                                                                           Encoder Assembly 

3.0       DSG ENCODER ASSEMBLY 

   Item      Description                   Qty 

                                                         Item      Description                   Qty 

     1       DSG Digital Reader Head         1 

     2       DSG Scale                       1             6       Support Pillar Long             2 

     3       Scale Support Link              2             7       Scale Cover                     1 

     4       Scale Anchor Pin                2             8       M5 x 20 Hex Head                6 

     5       Support Pillar Short            2             9       M8 x Socket Button Head         2 

4.0       DMG ENCODER ASSEMBLY 

   Item      Description                   Qty             Item      Description                   Qty 

     1       DMG Digital Reader Head         1               8       Scale Cover                     1 

     2       DMG Scale                       1               9       M3 Spring Washer                1 

     3       Support Link                    2               10      M3 x 16 SHCS                    1 

     4       Anchor Pin                      1               11      M3 x 12 SHCS                    4 

     5       Support Pin                     1               12      M4 x 5 Nylon Set Screw          1 

     6       Support Pillar Short            2               13      M6 x 10 Socket Button Head      2 

     7       Support Pillar Long             2 

                                                                                 Newall Measurement Systems         6 

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Mounting the Digital Reader Head 

         5.0       MOUNTING THE DIGITAL READER  

                   HEAD 

         5.1       DSG Digital 

         Mount the Digital Reader Head together with its bracket(s) to the machine and secure the assembly parallel with axis 

         travel to within +/-0.05mm (0.002").  (Refer to Figure 5.1) 

                                      Figure 5.1 - Alignment of the DSG Digital Reader Head 

         Final adjustments can be carried out by use of laminated shims, which are included with each transducer assembly. 

         Each layer of shim is equivalent to 0.05mm (0.002"). 

         5.2       DMG Digital 

         Mount the Digital Reader Head together with its bracket(s) to the machine and secure the assembly parallel with axis 

         travel to within +/-0.05mm (0.002"). (Refer to Figure 5.2) 

                                    Figure 5.2 - Alignment of the DMG Digital Reader Head 

7     Newall Measurement Systeewall Measurement Systems 

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                                                                                                        Mounting the Scale 

6.0         MOUNTING THE SCALE 

6.1        DSG 

6.1.1      Double End Mounting 

Note:      Refer to section 6.1.3 for mounting scales in excess of 2.5 meters. 

Each end of the DSG Scale is different and can be identified by the pan head screw at the 'tensioner end' and a nylon 

snap rivet at the 'fixed end'. 

                                                    Figure 6.1 - DSG Scale 

NOTES: 

(A)        Erroneous readings will occur if the Digital Reader Head is allowed to travel beyond the Effective  

Travel Limits.  (Refer to Figure 6.1) 

(B)        The pre-load on the balls are factory set via the set screw at the tensioner end.  Do not tamper with  

or adjust the set screw as this will alter the calibration and accuracy specification of the scale. 

(Refer to Figure 6.1) 

(C)        When mounting scales in the vertical plane the tensioner end should be positioned at the top. 

Once the Digital Reader Head is secured and correctly aligned, the scale support brackets can now be fitted. The scale 

support brackets consist of the support pin, the support link and the pillar(s). 

Traverse the machine to its maximum position toward the non-cable entry side of the Reader Head.  Maximum 

position means all available travel, including hand winding past any electrical limits or trip dogs. 

Carefully slide the DSG Scale through the Digital Reader Head, allowing for a sufficient amount of scale to project from 

the Reader Head in order to fit the scale support brackets. 

Assemble the scale support link to the scale support pin leaving approximay 3mm (1/8") gap between the bottom of 

the pin shoulder and the top of the link. 

Slide the link/pin assembly onto the scale to approximay 5mm (0.2") away from the end of the Digital Reader Head. 

Transfer punch through the support link and into the machine casting.  It is important that the support link is kept 

square to its mounting surface at all times. 

Remove the link/pin assembly and the scale from the Digital Reader Head.  Drill and tap M8 x 18mm deep (USA 5/16 - 

 18 x 3/4" deep) into the machine casting as marked by the transfer punch.  Fit the pillar(s) to the machine casting by 

using one of the methods shown in Figure 6.3. The pillar should fit square and flush to the machine surface. 

                                                                                               Newall Measurement Systems               8 

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Mounting the Scale 

           A maximum of two support pillars may be screwed together to allow for sufficient adjustment of the scale.  If two 

            pillars are insufficient to enable the scale to be mounted, then additional brackets will be necessary. These brackets 

            must be sufficiently rigid to eliminate any axial movement of the scale. 

            Loosely fit the support link/pin assembly onto the pillar and pass the scale through the Digital Reader Head and into 

           the support pin. While gently sliding the scale forward and back 25 - 50mm (1" - 2") through the support pin, carefully 

           tighten the hex screws on the support link, ensuring that the scale slides smoothly through the Digital Reader Head 

           and into the support pin.  If any interference is detected then fully loosen the hex screws on the support link and 

            repeat this step. 

            Note:      Do not force the Scale through the Support Pin 

                                                        IMPORTANT WARNING: 

             THE CENTRE LINE BORE OF THE READER HEAD MUST BE IN DIRECT ALIGNMENT WITH THE CENTRE LINE 

                BORE OF THE SUPPORT PIN.  PERMANENT DAMAGE TO SCALE AND/OR ERRONEOUS READINGS WILL 

                                    OCCUR IF THIS WARNING IS NOT FOLLOWED.  REFER TO FIGURE 6.2 

                                              Figure 6.2 - DSG Reader Head and Bracket Alignment 

            Remove the scale from the Digital Reader Head and traverse the machine to its full extent in the opposite direction. 

            Full extent means hand winding past electrical limits. 

           Assemble the scale support link to the scale support pin leaving approximay 3mm (1/8") gap between the bottom of 

           the pin shoulder and the top of the link. 

           Slide the link/pin assembly onto the scale making certain that there is sufficient clearance between the Reader Head 

           and the support link to prevent damage to the Digital Reader Head cable.  Do not secure the support pin to the scale 

           at this time. 

           Transfer punch through the support link and into the machine casting.  It is important that the support link be kept 

           square to its mounting surface at all times. 

9      Newall Measurement Systeewall Measurement Systems 

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                                                                                                    Mounting the Scale 

Remove the link/pin assembly and the scale from the Digital Reader Head.  Drill and tap M8 x 18mm deep (USA 5/16” 

-18 x 3/4” deep) into the machine casting as marked by the transfer punch.  Fit the pillar(s) to the machine casting by 

using one of the methods shown in figure 6.3. The pillar shoulder fit square and flush to the machine surface. 

                                              Figure 6.3 - Support Pillars 

A maximum of two support pillars may be screwed together to allow for sufficient adjustment of the scale.  If two 

pillars are insufficient to enable the scale to be mounted, then additional brackets will be necessary. These brackets 

must be sufficiently rigid to eliminate any axial or radial movement of the scale. 

Loosely fit the support link/pin assembly onto the pillar and pass the scale through the Digital Reader Head and into 

the support pin. While gently sliding the scale forward and back 25 - 50mm (1" - 2") through the support pin, carefully 

tighten the hex screws on the support link, ensuring that the scale slides smoothly through the Digital Reader Head 

and into the support pin.  If any interference is detected then fully loosen the hex screws on the support link and 

repeat this step. 

Carefully slide the DSG Scale through the support pin, through the Digital Reader Head and into the opposite support 

pin. FULLY TIGHTEN THE SUPPORT PIN HEX SCREW AT THE FIXED END OF THE SCALE, BUT ONLY 'SNUG 

UP' THE HEX SCREW ON SUPPORT PIN AT THE TENSIONER END. 

6.1.2      Single End Mounting  

Note:      The maximum total length of the scale must not exceed 610mm (24") when using a single  

           end mounting kit. The single end mounting kit is sold separay, ask for UK part number  

           600-63610, USA part number LBK01. 

Remove the nylon pan head screw from the tensioner end of the scale. 

After the Digital Reader Head has been installed slide the scale through the Digital Reader Head and insert the 

tensioner end of  the scale into the single end mounting block.  (Refer to Figure 6.4) 

Once the position for the single end mounting block has been determined mark the machine casting using the slot in 

the mounting block as the guide . Drill and tap M6 x 12mm deep (USA 1/4 - 20 x 1/2”).  Fit the mounting block using 

the M6 (USA 1/4 - 20) socket head cap screw and washer. 

Check the alignment by gently sliding the scale through the head and in and out of the mounting block, adjustments 

may be carried out by altering the M5 jacking screws. When the alignment is complete secure the scale by inserting 

the M5 screw and washer through the mounting block and into the tensioner end of the scale. 

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Mounting the Scale 

                                                       Figure 6.4 - DSG Single End Mounting  

         6.1.3        Scales in Excess of 2.5 meters 

         Traverse the machine to fullest extent of travel including hand winding past any electrical limits or trip dogs. 

         Insert the short blank length of DSG tube into the Digital Reader Head, allowing for a sufficient amount of scale to 

         project from the Digital Reading Head in order to fit the scale mounting brackets. 

         Assemble the angle bracket to the scale clamp (Refer to Figure 6.5).The jacking plate is included in each bracket kit, 

         this will only be required if the machine mounting face is not a machined surface.  Slide the assembly onto the scale 

         allowing approximay 10mm clearance from the end of the Reader Head. 

         Mark the position of the jack plate (if required) or the angle support bracket.  Drill and tap the necessary fixing holes 

         and assemble the bracket to the machine. 

         Remove the blank tube and the bracket assembly from the Digital Reader Head. Drill and tap M8 x 18mm  

         (USA 5/16”-18 x 3/4”) fixing holes. Fit the jack plate (if required) and secure  to the machine.Assemble the scale 

         clamp and the angle bracket to the jack plate but do not secure. Traverse the Digital Reader Head as near to the 

         bracket assembly as possible. Slide the blank tube through the Digital Reader Head into the scale clamp.Adjust the 

         brackets into position and carefully tighten the screws. Check that the blank tube slides through the Digital Reader 

         Head and into the scale clamp smoothly without any fouling or interruption. 

         Remove the blank tube and traverse the machine to the full extent in the opposite direction. Remember the "full 

         extent" is the absolute maximum travel up to the mechanical "dead stops". 

         Check the overall length of the actual scale and measure from the outside edge of the scale clamp already fitted to the 

         machine and mark the position of the scale on to the machine. 

         Slide the DSG blank tube into the Digital Reader Head, assemble the remaining scale bracket assembly including the 

         jacking plate (if required) and slide onto the tube. 

         Set the outside edge of the scale clamp level with the mark that indicates the overall length of the DSG Scale and 

         mark the fixing position for the bracket assembly. 

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                                                                                                  Mounting the Scale  

                                  Figure 6.5 - Long Scale Support Bracket Assembly 

For scales which are mounted in the horizontal position, spring loaded scale supports are included and should be 

positioned according to Table 1. 

Once the locations for the supports have been determined, the DSG Reader Head should be positioned in the location 

where the first support is to be fitted. Assemble the support unit including the jack plate if required. Mark the position 

for the fixing screws, drill and tap (M8 for the jack plate or M6 for the angle bracket). Ensure that the angle bracket has 

sufficient movement utilising the two slots to allow for adjustment in the vertical plane.  It is important that the top 

face of the angle bracket is set to 58.5mm (2.3”) from the bottom machined face on the DSG Reader Head. 

                             Figure 6.6 - DSG Long Scale Mounting and Support Details 

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Mounting the Scale 

            Length      No off Scale          FROM FIXING  BRACKET                Mid Position of  Left Side Position  Right Side Position 

                          Supports        Left Side (A)        Right Side (B)       Travel (B)        of Travel (C)       of Travel (C) 

              2500mm          2              850mm                 850mm                -                   -                   - 

              3000mm          2              1100mm                1100mm               -                   -                   - 

              3500mm          2              1350mm                1350mm               -                   -                   - 

              4000mm          2              1500mm                1500mm               -                   -                   - 

              4500mm          3              1125mm                1125mm            2250mm                 -                   - 

              5000mm          3              1250mm                1250mm            2500mm                 -                   - 

              5500mm          3              1350mm                1350mm            2750mm                 -                   - 

              6000mm          3              1500mm                1500mm            3000mm                 -                   - 

              6500mm          4              1300mm                1300mm               -                650mm               650mm 

              7000mm          4              1400mm                1400mm               -                700mm               700mm 

              7500mm          4              1500mm                1500mm               -                750mm               750mm 

              8000mm          4              1600mm                1600mm               -                800mm               800mm 

              8500mm          5              1410mm                1410mm            4250mm              1410mm              1410mm 

              9000mm          5              1500mm                1500mm            4500mm              1500mm              1500mm 

              9500mm          5              1580mm                1580mm            4750mm              1580mm              1580mm 

              10000mm         6         1420mm & 2840mm       1420mm & 2840mm           -                710mm               710mm 

              10500mm         6         1500mm & 3000mm       1500mm & 3000mm           -                750mm               750mm 

              11000mm         6         1570mm & 3140mm       1570mm & 3140mm           -                785mm               785mm 

                                                                        Table 1 

           6.2         DMG Scale 

                                                               Figure 6.7 - The DMG Scale 

           NOTES: 

           (A)        Erroneous readings will occur if the DMG Digital Reader Head is allowed to travel beyond  

                      Effective Travel Limits.  (Refer to Figure 6.7) 

           (B)        The pre-load on the balls are factory set via the set screw at the tensioner end.  Do not tamper with  

                      of adjust the set screw as this will alter the calibration and accuracy specification of the scale and  

                      void the warranty. 

           (C)        When mounting scales in the vertical plane the tensioner end should be positioned at the top. 

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                                                                                                           Mounting the Scale 

The scale support brackets kit consists of the Anchor Pin,  Support Pin , Support Link, and Pillar(s). (Refer to Figure 

5.8)  In order to avoid the risk of damage to the scale during installation all DMG Linear Digital Encoders include a set 

up bar. The set up bar is of the same diameter as the DMG Scale and will be used to align the brackets to the Digital 

Reader Head. 

                                              Figure 6.8 - DMG Scale Support Bracket 

Traverse the machine to its maximum position toward the non-cable entry side of the Digital Reader Head.  Maximum 

position means all available travel, including hand winding past any electrical limits or trip dogs. 

Carefully slide the DMG Scale set-up bar through the Digital Reader Head, allowing for sufficient scale to project from 

the Digital Reader Head in order to fit the scale support brackets. 

Assemble the support link to the anchor pin leaving approximay 3mm (1/8") gap between the bottom of the anchor 

shoulder and the top of the link. 

Slide the link/anchor assembly onto the scale set-up bar to approximay 5mm (0.2") away from the end of the Digital 

Reader Head. 

Transfer punch through the support link and into the machine casting.  It is important that the support link be kept 

square to its mounting surface at all times. 

Remove the link/anchor assembly and the scale set-up bar from the Digital Reader Head.  Drill and tap M6 x 12mm 

deep hole (USA 1/4 - 20 x 1/2") into the machine casting as marked by the transfer punch.  Fit the pillar(s) to the 

machine casting by using one of the methods shown in Figure 6.3. The pillar shoulder fits square and flush to the 

machine surface. 

A maximum of two support pillars may be screwed together to allow for sufficient adjustment of the scale. 

If two pillars are insufficient to enable the scale to be mounted, then additional brackets will be necessary. These 

brackets must be sufficiently rigid to eliminate any axial movement of the scale. 

Loosely fit the support link/anchor assembly onto the pillar and pass the scale set-up bar through the Digital Reader 

Head and into the anchor pin. While gently sliding the scale set-up bar in and out of the anchor pin, carefully tighten 

the cap screws on the support link, ensuring that the scale set-up bar slides smoothly through the Digital Reader Head 

and into the anchor pin.  If any interference is detected then fully loosen the cap screws on the support link and repeat 

this step. 

Remove the scale set-up bar from the Digital  Reader Head and traverse the machine to its full extent in the opposite 

direction.  Full extent means hand winding past electrical limits. 

Assemble the scale support link to the support pin leaving approximay 3mm (1/8") gap between the bottom of the 

mounting shoulder and the top of the link.  (Refer to Figure 6.8) 

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Mounting the Scale 

          Slide the link/pin assembly onto the scale set-up bar making certain that there is sufficient clearance between the Digital 

          Reader Head and the support link to prevent damage to the Digital Reader Head cable.  Do not secure the support pin 

          to the scale at this time. 

          Transfer punch through the support link and into the machine casting.  It is important that the support link be kept 

          square to its mounting surface at all times. 

          Remove the link/pin assembly and the scale from the Digital Reader Head.  Drill and tap M6 x 12mm deep (USA 1/4 - 

          20 x 1/2 deep) into the machine casting as marked by the transfer punch.  Fit the pillar(s) to the machine casting by 

          using one of the methods shown in Figure 6.3. The pillar shoulder fit square and flush to the machine surface. 

          Loosely fit the support link/pin assembly onto the pillar and pass the scale set-up bar through the Digital Reader Head 

          and into the support pin. While gently sliding the set-up bar forward and back 25 - 50mm (1" - 2") through the 

          support mounting, carefully tighten the screws on the support link, ensuring that the scale set-up bar slides smoothly 

          through the Digital Reader Head and into the support pin.  If any interference is detected then fully loosen the screws 

          on the support link and repeat this step. 

                                                      IMPORTANT WARNING  

            THE CENTRE LINE BORE OF THE READER HEAD MUST BE IN DIRECT ALIGNMENT WITH THE CENTRE LINE 

               BORE OF THE SUPPORT PIN.  PERMANENT DAMAGE TO SCALE AND/OR ERRONEOUS READINGS WILL 

                                  OCCUR IF THIS WARNING IS NOT FOLLOWED.  REFER TO FIGURE 6.9 

                                               Figure 6.9 - DMG Reader Head and Bracket Alignment 

          Carefully slide the DMG Scale through the support pin, ensuring the fixed end is inserted first, through the Digital 

          Reader Head and into the anchor pin. 

          Using the M3 x 16 skt cap screw and spring washer, secure the scale to the anchor pin. It is important that the nylon 

          set screw on the support pin be only “pinched” to the scale at the tensioner end.  DO NOT OVER TIGHTEN THE 

          NYLON SET SCREW ON THE SUPPORT PIN. 

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                                                            Mounting the Scale / Fitting the Scale Guard 

6.2.1      Single End Mounting 

For installations requiring a lower profile assembly, there is an alternative method for fixing the scale at one end only 

by way of the single end mounting block assembly (Refer to Figure 6.10). The DMG single end mounting kit is sold 

separay, as for UK part number 600-65340, US part number LBK02 (for DSG & DMG) and LBK03 (for DMG only). 

Note:      The maximum total length of scale not exceed 450mm  (18") when using the single end  

           mounting block. 

Once the Digital Reader Head has been installed slide the scale through the head and insert the fixed end of the scale 

into the single end mounting block.  (Refer to Figure 6.10) 

Once the position for the single end mounting block has been determined mark the machine casting with the slot in 

the block . Drill and tap a M5 x 12mm deep hole. Fit the bracket using the M5 skt head cap screw and washer.        Check 

the alignment by gently sliding the scale through the head and in and out of the mounting block, adjustments may be 

carried out by altering the M3 jacking screws. When the alignment is complete secure the scale by inserting the M3 

screw and spring washer through the mounting block and into the fixed end of the scale. 

                                       Figure 6.10 - DMG Single End Mounting 

7.0        FITTING THE SCALE GUARD 

Each Encoder includes a protective guard. This aluminium guard is intended to protect the scale from impact damage. 

The guard can be attached to the machine casting or by means of the scale support pillars.  (Refer to Figure 7.1) 

To fit the guard to the support pillars, measure and mark off the distance between the centre of each pillar.  For DSG 

drill two 8.5mm (3/8"), for DMG 7mm (9/32”) holes at either end of the guard. The guard can be attached to the 

pillars by using the button head screws provided. After the guard is attached, move the machine axis to both extents 

of its travel ensuring that the guard does not interfere with or rub against the Digital Reader Head. 

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Fitting the Scale Guard / Cable Routing / Final Check 

                              Figure 7.1 - Fitting the Scale Guard (example shown using a DSG Scale) 

       8.0 CABLE ROUTING 

       The most important and the most over looked aspect of fitting the Encoder is proper cable routing.  Dangling and 

       loose cables can be snagged or broken causing irreparable damage.  Care should be taken in order to ensure that the 

       cables are secured to the machine and that cable loops do not interfere with any part of the machine or the Encoder 

       movements.  "P" clips and thread forming screws are provided to route the cables from the Digital Reader Head to the 

       digital readout unit. 

       Note:       The armoured cable is an integral part of the Digital Reader Head.  If the cable becomes  

                  damaged, then it would have to be replaced complete with the Reader Head. 

       If extension cables are used, do not allow the plug and socket junction to lie in the swarf tray or in the direct flow of 

       coolant or oil. 

       In order to avoid problems associated with electrical noise and interference, do not allow the cables to lie across 

       electrical motors, fuse boxes or electrical pumps. 

       9.0         FINAL CHECK 

       Prior to putting the Encoder into operation, slowly traverse the machine axis to both extents of its travel checking at 

       all times that the cables are secure and that machine over travel cannot occur.  Newall will not accept responsibility 

       for Encoder malfunction caused by over travel or damaged cables. 

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                                                                              Appendix A 

Appendix A -- Mounting the Digital Reader Head 

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Appendix B 

         Appendix B - DSG Scale Support Brackets 

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                                                                              Appendix B 

Appendix B - DMG Digital Scale Support Brackets 

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