Tramming ShopSabre CNC Router Spindle

If the spindle on ShopSabre is cutting with uneven or misaligned step-overs - especially noticeable when surfacing spoil-board, it is likely time to tram the spindle.

1. Needed:

• Milled Machinist Block - Can use our Granite in Office
• Dial Indicator
• SST Tram Tool
• Dead-blow Mallet
• Ratcheting Wrench
• 3/16" Hex Head Extension
• Leveling Jacks
• Shim Kit (If Needed)

Instructions from SS PDF Below. Images in PDF.

2. Move Gantry 6 inches from Front Center

Set up leveling feet to roughly level the machinist block (roughly between .020" to .030" for each corner).

3. Mount Dial Indicator to STATIONARY PORTION OF SPINDLE

Do a fine level of the block moving the indicator needle from corner to corner measuring to make sure there is no difference in height between each corner of the block.

4. Attach Spindle Tram Tool Parallel to Y-Axis

Zero out each Dial

5. Flip Tram Tool around 180 degrees, the dial should be at zero.

6. Use Shims if Needed

If not shims must be placed between spindle plate and bearing backplate behind either the top or bottom bolt holes to accommodate a change in pitch in the y axis.

7. Rotate Spindle Tram to be Parallel with X-axis

Reset zeros for each gauges.

8. If Out in X:

If the spindle is out of square on the x axis then loosen the four lower mounting bolts, then take a prybar and pry lightly between the spacer for the linear rail and the bracket mounted to the side of the spindle until the spindle is back in square. Finally tighten the bolts to lock it back into position.

9. Tighten Bolts & Repeat 7 and 8 if Needed.

Torque Specs from NASA

Warning - lb-in spec

Getting around 10 FT•LB on multiple sources.

Convert IN•LB to FT•LB by dividing by 12

NASA says max torque for steel 1/4-20 in 6061 is 153.7 IN•LB or 12.8 FT•LB or 13.56 Nm