Reply To: Z-axis losing steps

#7194
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vicious1
Keymaster

Easy one first, Flip your x axis plug to fix the mirroring.

For the Zaxis, check the driver voltage. I ship it at about 0.43V. If it is not at that voltage turn it to that. If it is already there turn it up 0.1v at a time and give it a test. you can turn it up pretty high but eventually the stepper will get hot, and if you go above 0.72V you should put a fan on your ramps board to keep the drivers cool. You can actually turn them all up to get more power if you have active cooling. Little hidden bonus…

I have a test script you can cut and paste into repetier if you right click on the number buttons in manual control. #2 is a z axis only test. I run these on every board on one of my machines before I ship them.

To use the scripts just right click on the numbers in the repetier manual control screen and paste the following in spot 1 and 2. Apply, then clock on the number to run it.

1) All axis – Xand Y back and forth 100mm and the z axis up and down 9mm max.
G91
G0 Y100 F11400
G1 Y-100 F11400
G1 X100 F15000
G1 X-100 F15000
G1 Z9 F20000
G1 Z-9 F522
G1 Z1 F2000
G1 Z-1 F2000
G1 Z1 F2000
G1 Z-1 F2000
G90

2) Z torture – up and down 30mm , small rapids, repeat 3 times.
G91
G1 Z30 F522
G1 Z-30 F522
G1 Z3 F522
G1 Z-3 522
G1 Z1 F522
G1 Z-1 F522
G1 Z30 F522
G1 Z-30 F522
G1 Z3 F522
G1 Z-3 522
G1 Z1 F522
G1 Z-1 F522
G1 Z30 F522
G1 Z-30 F522
G1 Z3 F522
G1 Z-3 522
G1 Z1 F522
G1 Z-1 F522
G90