Dual z ender v2, no current change available

[Alfiegerner]

Hi,

Thinking of trying the dual z version using stock ender 3 v2 board. This means it will be one driver with split cable to two motors, and that i won't be able to change current in the macro.

Do we think the gantry tramming is out of the question, even if done slowly? Best avoided or worth a shot?

[kevinakasam]

Hello!
To be honest, I left Marlin a long time ago, and I'm not very familiar with the stock board and firmware. But you would definitely need to increase the current because you are running two steppers in parallel, which means you need double the current (there is a small potentiometer next to the driver to do this. You should be fine with ~0.6A for the standard steppers).

If there is no way to change the current for a Tram Z, try to find a low standard current that is suitable for normal use. Maybe that's low enough to run the Tram Z. But all the parts are super strong, so the belt would slip before anything could break. So I can't give you a good solution, except to test it. You wouldn't have to do the Tram Z that often, the dual Z axis is very strong. If you are careful, you could move the x axis by hand without affecting the z axis.

You could also try to do a Tram Z by hand, which means you move the z-axis to the maximum position by hand, but I don't know how that would perform.

[Alfiegerner]

Thank you! As it happens I'll need to wait to try dual z, will be trying one z motor first. I was running dual z on klipper with slightly increased vref by screw (for v2), but i managed to screw my y motor whilst tinkering so back to 1 z motor for now. Will definitely be trying both at some point.

Great project, thank you!