pg.
26
Using the gantry as a guide for aligning the second rail
Roll the gantry to the center of the table, and make sure that the four wheels are all fully engaged with the rail.
Tighten the bolts directly under and around the gantry on the rear table side rail. Move the gantry 12” in one
direction and tighten a few more bolts, adjusting the position of the rail if necessary.
Next, move the gantry back in the other direction and repeat these steps, working outwards from the center until
the entire rail is straight and tight.
If you have a wheel that “floats”
While moving the gantry down the length of the table, all wheels should remain in contact with the rails. If you
have a wheel that “floats” above the rail at any point, this needs to be corrected before you move on. The most
likely issue is that the rails are not perfectly parallel, causing one of the wheels to ride up. This can be corrected by
loosening and carefully adjusting the rear table side’s rail.
If the problem is constant throughout the length of travel, first check that the rails are still level with each other.
Then measure between the rails at several points along the table to make sure they are correctly spaced according
to the size of your machine (tolerance is 1/16” or 1.6mm)
Table size (Y axis):
48”
60”
72”
108”
Distance between rails
(outside to outside)
65-13/16”
(167.12cm)
77-13/16”
(197.64cm)
89-13/16”
(228.12cm)
125-13/16”
(319.56cm)
If these measurements are also correct, please contact tech support for further assistance.
Assemble Your Shopbot PRS Gantry Tool 2015 02 27.Docx
© 2015 ShopBot Tools, Inc.
