MicroE CE300 ChipEncoder - Manual (Page 9)

Installation of Linear Scales
MicroE Systems
L
0.2L 0.6L 0.2L
Benching pins
Positioning the Scale
Note: Before beginning mounting procedure, use talc-free gloves or finger cots to handle the scales.
"Benching" the scale to the system means aligning the scale by means of benching pins. Pin locations are described on the appropriate interface drawing.
Two benching pins are recommended on the long side of the scale and one at the end as shown . This is marked datum A on the interface drawing.
Position the benching pins in from either end. 20% of the overall scale length
is the recommended location from the edge.
Be sure the benching pins do not extend too high in the Z direction to prevent
mechanical interference with the sensor or sensor mount.
2 1
End
Benching
Pin
Mounting the Scale
MicroE Systems' linear scales should be affixed to the mounting surface. Two different approaches are described below:
RTV around entire
outside edge of scale.
End Benching
Pin
Hard epoxy
at one corner,
this end only.
Epoxy and RTV Mounting (Recommended for best accuracy)
1
Make sure the mounting surface is clean
and dry.
Optional scale clamps may be used to secure the scale while
the adhesive cures. Avoid damage to the top surface.
Side view showing option-
al scale clamps and scale.
Space clamps every
75mm on scales over
150 mm in length.
4
Apply a hard epoxy, such as Tra-Con’s Tra-Bond 2116, to the end of the scale at the end benching pin. Apply 100% Silicone RTV adhesive around
the edges of the scale. This method allows thermal expansion from the benched end of the scale. After adhesive curing, remove the scale mounting
clamps or, if permanently installing clamps, make sure they do not interfere with the sensor or sensor mount.
3
MicroE Systems
L
2
Align the scale by placing the edges against the benching pins.
Benching pins
Scale clamp with
adhesive
Mounting clamp
Mounting clamp
Mounting clamp
Benching pins
MicroE Systems
L
2
3 1
Two Sided Adhesive Tape Mounting
Make sure the mounting surface is clean and dry. Peel the
cover paper off and place the scale above the final location.
Align the scale by placing the edges against the benching pins.
Gently place the scale on the mounting surface. Positioning adjustments can be made until the
scale is firmly pressed down. After final positioning, push down on the top of the scale to
secure it.
End Benching
Pin
Hard epoxy at one
corner,
this end only.
Page 9