Renishaw RGA22 User Manual Download Page 3

1.1 Applicator body

The applicator body has a retractable spring loaded plastic plunger that, during operation, applies a 
tacking force to the scale. The plunger is raised and lowered by means of the release knob shown 
and is held in both positions by detents.  
The plunger is retracted for setup purposes and lowered when scale application takes place.  
The release knob is shaped in arrowhead form such that if access or view is restricted it is possible 
to both determine the position of the plunger and raise or lower it.

1.2 Adaptors

 

The applicator body is mounted on an adaptor to set the correct offset between the readhead 

mounting face and the scale. There are four adaptors in the kit providing configuration for 15.5 mm 

and 11.5 mm offsets, and right or left hand operation. The two right hand adaptors should be used 
as standard. The left hand adaptors should be used only where access to engage the scale guide  
is not possible with the right hand ones.

1.3 Scale guide

 

The scale guide locates into the applicator head beneath the plunger knob and is retained by 
detents. In operation the scale guide guides the scale into the applicator whilst simultaneously 
removing the scale backing paper. It is detachable from the applicator body to enable easy loading 
of the scale and also incorporates a locking mechanism to prevent the scale falling out during initial 
setup. The lock is a pinch roller which is activated by tightening the extension handle. The release 
paper is separated from the scale by a blade within the guide and ejected to one side.

1.4 Extension handles

 

Three extension handles of different lengths are supplied for optional use to permit access to locate 
the scale guide into the applicator in restricted circumstances.  
They can be screwed together where particularly long extensions are required.

Hint:

 If long extensions are required, using the appropriate left hand adaptor may allow  

easier scale application

Caution

:  When using extension handles, care must be exercised to prevent collision with any 

protruding machine parts as they are likely to extend beyond the axis limits.

1.5 Tools and accessories

 

Shears are supplied to cut the scale to length prior to application.  
A 2.5 mm hexagon key and appropriate adaptor mounting screws are also included.

1. Kit contents

Figure 1a  RGA22 Scale applicator

Plunger detail

Mounting/adjustment screws

Machine bracket  

(not supplied)

Adaptor 

bracket

Applicator head

Plunger release 

knob

Retracted

Released

Scale 

guide

Extension handle

RGA22 Scale applicator kit 

 

A-9531-0265

Adaptor, right hand, 11.5 mm offset 
M-9531-0191

Adaptor, right hand, 15.5 mm offset 
M-9531-0193

Adaptor, left hand, 11.5 mm offset 
M-9531-0192

Adaptor, left hand, 15.5 mm offset 
M-9531-0194

Hexagon key 2.5 mm

Scale shears

Adaptor mounting 
screw 
M4 x 6 button head

Extension handles 

50mm  M-9517-2561 

100mm  M-9517-2562 

200mm  M-9517-2563

Scale guide 
A-9517-2573

Applicator head 
A-9531-0288

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