DIY CNC Milling Machine From Scratch

[Clive S]

Nice to see you have it up and running. I don't know anything about that board but are you powering it via the USB if so can you power it from a separate power supply?

Are you running the drives at about 68V?

You don't need to connect to the enable terminal, that won't effect missing steps etc.

[JAZZCNC]

Possibly due to the Step pulse being on the wrong side of the slope. Commonlly step pulse is on the rising edge but in some cases drives may be set so on the Falling edge. If this is the case and on wrong side then can lose one step with every direction change.

To check this write program that goes back n forth few hundred times on that axis. Mark the start point and check it goes back to same point after the moves.

If doesn't then change the Step low active in Motor Outputs. This will put the Step pulse on the opposite edge.

[totts]

Possibly due to the Step pulse being on the wrong side of the slope. Commonlly step pulse is on the rising edge but in some cases drives may be set so on the Falling edge. If this is the case and on wrong side then can lose one step with every direction change.

To check this write program that goes back n forth few hundred times on that axis. Mark the start point and check it goes back to same point after the moves.

If doesn't then change the Step low active in Motor Outputs. This will put the Step pulse on the opposite edge.

This would make sense as the toolpaths have a lot of direction changes due to it being an adaptive toolpaths, so if I change step low active will this run the motor in the opposite direction?


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[JAZZCNC]

This would make sense as the toolpaths have a lot of direction changes due to it being an adaptive toolpaths, so if I change step low active will this run the motor in the opposite direction?


Sent from my iPhone using Tapatalk

No it shouldn't but if it does then just go into Homing and Limits and select Reverse. You may need to change the Home direction.
Don't Change the Dir Active leave that the same as it can have an affect on drive.

However Like I said wouldn't change it without knowing for sure and the only way is to mark and run test code.