Taking Advantage of The Entire MR-1 Work Envelope – Chessboard

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Nod tuning Questions

The first step is to measure the tram error, here’s a good method to do that: How to square the Bridgeport head with the table - YouTube Note that you will need an articulating indicator mount that can be inserted into a collet so that you can manually turn the spindle shaft and sweep a circle on the table. Set the indicator arm such that the tip is sweeping a 4" circle. Zero the indicator in the 12 o’clock position. Then rotate the spindle until the indicator is at the 6 o’clock position. If …

^ Here is a write up on how to tune in spindle tram on the machine.