X or Y movement after homing, towers exceeding endstops February 16, 2015 04:02PM |
Registered: 10 years ago Posts: 61 |
Re: X or Y movement after homing, towers exceeding endstops February 16, 2015 06:24PM |
Registered: 10 years ago Posts: 14,672 |
Re: X or Y movement after homing, towers exceeding endstops February 16, 2015 09:01PM |
Registered: 9 years ago Posts: 58 |
Re: X or Y movement after homing, towers exceeding endstops February 17, 2015 04:48AM |
Registered: 10 years ago Posts: 732 |
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dc42
On a delta, you should always lower the head sufficiently after homing before moving the head in the X or Y direction. In RepRapFirmware for Duet electronics, the head is lowered a little automatically at the end of the homing sequence; but I don't think other firmwares do that.
Re: X or Y movement after homing, towers exceeding endstops February 17, 2015 04:53AM |
Registered: 10 years ago Posts: 732 |
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boksbox
Zmax height on deltas can be misleading. Other than 0, you can't have any other X or Y value when it is on Z max. Trying to jog it in X or Y will raise one or two of the carriages past the endstops. And I don't think the Rich Cattell's firmware has a safety feature to prevent the carriage going past the endstops.
Re: X or Y movement after homing, towers exceeding endstops February 17, 2015 06:32AM |
Registered: 9 years ago Posts: 58 |
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hercek
Rich's firmware is Marlin derived so it probably has ENDSTOPS_ONLY_FOR_HOMING define. Do not define it (comment the line out). Then firmware will not try to move a carriage past an endstop. It will still probably screw up relationship between cartesian and delta ... leading to wrong movements later but at least it will not try to ram past endstops.
Re: X or Y movement after homing, towers exceeding endstops February 17, 2015 09:21AM |
Registered: 10 years ago Posts: 61 |
Re: X or Y movement after homing, towers exceeding endstops February 17, 2015 01:06PM |
Registered: 10 years ago Posts: 732 |
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boksbox
I tried this and it really messed up. After homing, all the carriages repeatedly kept pushing through the endstops.