Problem
This test is for: Pre 2020 Machines
X, Y or Z axis stalls. Drives have been mechanically aligned.
Solution
Alpha Tune Test
If the machine stalls upon moving the axis with the pendant or onscreen controls, use a ruler to measure a certain distance on the stalled stage and record the rotary and linear encoder reading for both positions.
If the machine still can be driven with the pendant or onscreen controls. Release the E Stop.
Move the axis to a position near the negative hard stop -do not let the stage reach the hard stop-. Click "Set 1" in Alpha Tune.
Move the axis to a position near the positive hard stop -do not let the stage reach the hard stop-. Click "Set 2" in Alpha Tune.
Move from Position 1 to Position 2 by clicking "Go 1" and "Go 2"
Repeat this 10 times and record the "Ctrl", "Meas", "Sync" and "Index Mark" values.
Do the “Ctrl” and “Meas” counts repeat when returning to the same position?
If “Ctrl” is losing counts, check the coupler is tightened, realign drive.
If “Meas” is losing counts check the coupler is tightened, realign drive.
Switch breakout boards between X and Y axis, test counts again in Alpha Tune. If the problem follows the breakout board, then replace it.
Switch X and Y cables on the logic board, test counts in Alpha Tune. Make sure the axis selection in Alpha Tune is inverted between X and Y.
If the problem remains in the same axis connection on the logic board, change the logic board.