Specifications

Southwestern Industries, Inc.
ProtoTRAK SMX K2, K3, K4 & Retrofit Safety, Installation, Maintenance, Service & Parts List Manual
90
5. Use the jackscrews on the reader head to compensate for some gap between the reader head
and the reader head mounting bracket. Leave the alignment brackets attached to the reader
head. This bracket assures the reader head is aligned to the glass scale.
6. Tighten each jackscrew until it touches the bracket and then back it off 0.001” or
0.002”. Use a feeler gage to set the gap.
7. Tightening the reader head mounting screws. This ensures the reader head is aligned
within a few thousandths.
8. Remove the shipping bracket that fixes the reader head to the scale for shipping.
CAUTION!
After the reader head is attached to the reader head-mounting bracket, do not move
the machine axis until the shipping bracket is removed. This will break the reader
head. This is not covered under warranty.
See Figure 29 for an illustration of how to align glass scales.
5.1.7.3 Install the Z-Axis Glass Scale
See Figure 28.
1. Check the tram of the head in the X direction. If it is within a few thousands then
continue on. If not tram.
2. Assemble Z-axis glass scale mounting bracket and mount to head. Items 1, 2, 3 and 4.
Tap items 3 and 4 together and tap item 3 into the quill stop knob. Leave the bolt loose.
Use 2 screws (item 6) and mount item 4 to the side of item 2 using a spacer between
both items to provide a gap of approximately 0.040” between Items 2 and 4. This is to
make sure item 2 does not rub against item 4.
3. Align the glass scale bracket (Item 2) with an indicator and tighten the mounting screws.
Leave the quill stop knob screws loose. Remove the spacer and bolts from Item 4.
4. Unscrew the shipping protection screw from the scale.
5. Mount the glass scale to the mounting bracket and align it with an indicator. It needs to
be aligned within 0.008" with respect to the quill. Tighten the screws down.
6. Fasten the readerhead to the readerhead bracket.
7. Move the readerhead up and down the glass scale and make sure the gap is consistent
between the readerhead and the glass scale. Tighten the screw to the quill stop knob.
8. Remove the red head securing plate.
9. If the gap is not consistent between the readerhead and the glass scale when moving
the quill up and down then adjust the angle of the scale to make the gap consistent.
CAUTION!
The gap must be no larger than 0.060” between the readerhead and glass scale.