Challenge SPARTAN 185, Service Manual

Page: 19 / 108

3.0 Maintenance Guide
18
8. Tighten the (5) accessible knife screws, replace top cover and display panel, restore power to
machine, raise knife up by turning on power switch, and tighten (1) remaining knife screw.
3.5.6 Backgauge Gib Adjustments (All Models)
If the backgauge does not stay square or moves up and down or back and forth when jogging paper
against it, the backgauge gib screws may be loose or worn.
To Adjust:
1. Turn off the power and disconnect the power cord.
2. Remove rear bottom cover.
3. Loosen the two outside gib screw jam nuts (Figure 12).
Figure 12
4. Tighten the two nylon set screws until they just touch the guide. Do not over-tighten or they
could cause the backgauge to bind. Lock in position with jam nuts. The center screw is a
spring loaded plunger and should not be adjusted.
5. Run the backgauge back and forth the length of the table and check for any binding.
Readjust if necessary. Replace the bottom cover.
3.5.7 Lead Screw Collars (Models: SA and A)
Any play in the backgauge lead screw may cause inaccuracies in backgauge position display.
Excessive play can be eliminated by adjusting the lead screw collars as follows:
1. Turn off the power and disconnect the power cord.
2. Open electrical panel on bottom of machine and slide forward (See Section 3.4 Accessing the
Electrical Panel, page 12).
3. Turn front hand wheel counterclockwise until backgauge is tight against back of machine and
rear collar is tight against the mounting block.
4. Loosen set screw in FRONT collar only (Figure 13, page 19), slide and hold collar tight
against mounting block, then tighten set screw.
Backgauge
Gib Screw and
Jam Nut
Backgauge
Gib Screw and
Jam Nut