Hi guys,
currently I'm working on a project that involves two Y motors. It's basically a gantry like this: [
youtu.be]. But with two Y motors instead of the coupler + linear rod setup. I made the gantry relatively flexible to protect the system from overdetermination (I am a mechanical engineer after all). I'm using an arduino mega with marlin and RAMPS 1.4 to drive the system. I want to use the Y slot for the left motor and the E1 slot for the right motor, this shouldn't be too hard I think. The pain is in the homing. Since the gantry is quite flexible it may get disaligned when the motors are disabled. Therefore I mounted two endstops, one left, one right. My homing procedure will be as follows:
- Home the gantry in Y using both motors until either one endstop is hit.
- Home the gantry using only the motor whose endstop was not hit yet.
I'm thinking of using the Y_min slot for the left motor and Y_max for the right motor. How would I go about implementing this procedure in the firmware?
Also, I'm building this kind of extruder: [
www.thingiverse.com], it will function as a vacuum pump of sorts. I'm building mine a little different but you get the idea. On boot the machine doesn't know what volume the syringe is holding, so I want to home it as well, probably using the Z_max slot. I asked a group of engineers about this but none of them thought it was possible without heavily modding the marlin firmware. Is there a way?
I don't mind dirty workarounds as long as they work.
