Delta printer max limits



  • I might have missed something but on delta printers M208 isn't used for max according to the manual so I can't limit my Z max like on my corexy. The delta radius is set but it doesn't seem to limit the Z anyways. Shouldn't it be possible to not move the steppers above the tower endstop? After I home I sometimes manage to go Z+ instead of Z- (brain fart..) and crash my carrigies into the homing switches. This ofcourse mess up my offsets and I have to run calibration from scratch again. The software knows how far it is from triggering the ends top on each tower since it know XY and rodlenght so why can't we use a M208 derivative for the towers when on a delta?

    Excuse me if this is a setting that I didn't find but I've searched a while for it without finding anything in the documentation or on the forum.


  • administrators

    RepRapFirmware does limit the maximum Z movement for normal moves, so after homing it should not be possible to drive the carriages above the endstops except when you make G1 H1, G1 H2, G1 S1 or G1 S2 moves while in relative mode.

    Which firmware version are you using? Can you give an example of movement commands that attempt to drive the carriages above the endstops?



  • I'm using 2.03rc2 and an example could be that after G28 I use the Z+25 button in the web interface and it smashes into the home switches. I know I'm to careless when I do such a mistake but I would really prefer not beeing able to crash if it was possible because user error will always occur.


  • administrators

    @minim said in Delta printer max limits:

    I'm using 2.03rc2 and an example could be that after G28 I use the Z+25 button in the web interface and it smashes into the home switches. I know I'm to careless when I do such a mistake but I would really prefer not beeing able to crash if it was possible because user error will always occur.

    You are right, there is a bug in the 2.03RC firmware. I'll get on to it.



  • Awesome! I'll follow the release on github and test it once a new rls is out. Thanks


  • administrators

    I've just released 2.03RC5 which includes a fix for this issue.



  • @dc42 on it like sonic!

    Edit: now it works fine stopping at the first endstop hit 😄 Thank you dc42!


 

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