I can't easily confirm the simmetry of my build but i'm working on finding a way to ensure everything's square and if not trying to compensate for tower misallignment in firmware (i.e. not using the -sin_60*delta_radius calculation but putting actual coordinates, any help on HOW to find them appreciated!)
Another thing I have noticed is that my rods joints have a "huge" play. They're a bit slack(?) and as a result the weight of the effector and what's on it moves everything a little. Monday I'll try to get some steel balls and move to a magnetic joint configuration, hopefully minimizing the play so to troubleshoot everything else better.
Thanks jaguarking, I admit i haven't performed any test for that in particular, i have assumed (i know, i know... :P) that my belt and pulleys + step count were spot on. i'll double check after the weekend!
I don't think so, before upgrading and adding the second extruder my prints were quite good. No signs of missing steps or dimensional instability. Even now if i put a pen in the middle of the effector it stays true to the bed, and the test prints were not "wrong", only the extruder at non center coordinates lifts so much from the bed that the material doesn't stick!
Anyway i'm really thankful for your help guys!
Another thing I have noticed is that my rods joints have a "huge" play. They're a bit slack(?) and as a result the weight of the effector and what's on it moves everything a little. Monday I'll try to get some steel balls and move to a magnetic joint configuration, hopefully minimizing the play so to troubleshoot everything else better.
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jaguarking11
I know this sounds silly, but have you calculated the steps /mm correctly for your particular setup? I would think that the motors are turning a different speed than desired causing wonky movement.
Thanks jaguarking, I admit i haven't performed any test for that in particular, i have assumed (i know, i know... :P) that my belt and pulleys + step count were spot on. i'll double check after the weekend!
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jaguarking11
Another thing to check would be motor current, make sure your not overloading the drivers and causing missed steps.
One more thing to keep in mind would be acceleration. Make sure your not trying to move it faster than the printer can handle. (I had this when homing at nearly 1200mm/s, I had to lower that a bit and its no longer an issue)
I don't think so, before upgrading and adding the second extruder my prints were quite good. No signs of missing steps or dimensional instability. Even now if i put a pen in the middle of the effector it stays true to the bed, and the test prints were not "wrong", only the extruder at non center coordinates lifts so much from the bed that the material doesn't stick!
Anyway i'm really thankful for your help guys!