VLS Service Manual - REV2015.04
X-Axis
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X-Axis
13. Using scissors, trim off the excess belt material but leave at least 1/4 inch of belt protruding out of the
belt clamp. DO NOT trim the belt flush with the clamp. Although this may look cleaner, trimming it flush
will eventually cause the belt to slip out of the clamp and would require replacement of the entire belt.
14. To tighten the belt, slowly tighten the setscrew on the tensioning bracket that was loosened earlier and
keep re-checking the scale until the belt has the proper tension. After proper tension is achieved, tighten
the three tensioning bracket mounting screws and re-check the tension to make sure that it has not
changed.
15. Re-attach the belt clamp to the side of the Focus Carriage.
16. Re-install the #2 Mirror Cover and thumbscrew.
17. X-axis belt replacement is complete.
10. Once the new belt is completely through the X-axis rail, remove the staple and discard the old belt.
11. Re-attach the belt clamp to the ends of the belt. Make sure that the rounded side of the clamp faces
inward. Gently pull the belt through the clamp until the slack in the belt is reduced. Leave the belt slightly
loose because the belt will be tensioned by adjusting the setscrew on the tensioner bracket on the left
side of the X- axis rail. Tighten down the screws on the clamp. DO NOT TRIM OFF THE EXCESS BELT
AT THIS TIME.
NOTE:
For the next step, you will need a spring scale and a ruler. Make sure the ruler has the 0 point at the end
of the ruler. (Some rulers offset the 0 point from the end; do not use that kind of ruler.)
12. On the X-axis rail, push the focus carriage all the way to the left and push the belt clamp all the way to
the right. Place the end of the ruler against the middle of the X-axis arm (NOT inside the belt groove).
Hook the spring scale onto the middle of the belt and pull the scale until you reach 1/2 inch. You should
read 100 - 125 grams (VLS6.60) or 150 - 175 grams (VLS3.60 and VLS4.60). The belt should still be
loose at this point, so the reading should be less than what is required.
Summary of Contents for VLS Series
Page 1: ...VLS Service Manual...
