I have a lowrider2 CNC
Haven’t used it in a while due to some issues. I have recently converted my Rambo V1.4 board that was running Marlin firmware to an Adruino CNC shield with grbl controls. When using the universal code sender the z axis will move up but then drops. Any idea why that is happening? I was having this same issue with the previous Rambo board. I am assuming the stepper motor shuts off after the command, dropping the axis. X and Y axis’ are belt driven and Z axis is lead screw driven on both sides.
thanks for any help.
There is a $ setting for how long to leave the motors enabled after a move, and 255 is infinite. I can’t remember which one, but UGS probably knows.
Make sure you are using a serial adapter for Z and not the second Z port.
The rambo uses digipots to adjust the current on each driver. I don’t know the grbl-rambo code, but make sure that is set to something reasonable. 900mA, or so.
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I think that’s $1.
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I did some digging and did find out that it is $1. So I just need to set my $1=255 and it will keep the stepper motors from shutting off. They are set to $1=25. I will update if it works out.