Hey folks.
I have a hand-me-down delta style printer. I believe it to be a Kossel 250 from Ultibots.
RAMPs 1.4 on Arduino Mega 2560 running Marlin 2.0.6
Bed heating control broke, apparently, so the heating leads have been removed.
I had a terrible time trying to manually calibrate this thing, but got pretty close. So many guides out there refer to using DELTA_SMOOTH_ROD_OFFSET for fine tuning, but best I can tell this is deprecated in recent builds of Marlin?
Anyhow, I was able to finish a half-decent Benchy, then put in an Ultibots FSR kit for autocalibration.
It would not finish a full `G33` pass without probe failure. Sometimes the effector would seem to drift too high when going from the X to the Y tower. I started down this path when I tried to print items that were within the supposed 200mm print diameter, but I'd end up printing in the air half the time.
Now, `G33 P0` and `G33 P1` pass every time. Sometimes I can get `G33 P2` to pass, which I believe is just probing center, and the 3 towers. I have only been able to get it to pass P2 at all with my printable radius set to 80mm rather than 100m as desired. `G33 P3` has never passed, this is when it does a triad of probes at the center, then starts probing in a circular manner counterclockwise around the bed. It usually starts floating upwards and failing shortly after the X tower.
Here's my fork in GitHub with a diff against the default Configuration.h (which is cartesian, but still highlights my changes) [github.com]
Here's the output from the terminal, sans temperature updates: [gist.github.com]
In short, I connected, ran M503 to show delta settings etc, then went through the G33 commands to failure.
Come to think of it, occasionally when attempting to home after a successful print, it will also fail and require reset. None of my prints ever get anywhere near the top limits. I don't run EEPROM, and I leave software endstops enabled at all times.
I could also upload some video to Youtube later, shots of Benchy or other recent failed prints if that would be helpful.
Thanks!
I have a hand-me-down delta style printer. I believe it to be a Kossel 250 from Ultibots.
RAMPs 1.4 on Arduino Mega 2560 running Marlin 2.0.6
Bed heating control broke, apparently, so the heating leads have been removed.
I had a terrible time trying to manually calibrate this thing, but got pretty close. So many guides out there refer to using DELTA_SMOOTH_ROD_OFFSET for fine tuning, but best I can tell this is deprecated in recent builds of Marlin?
Anyhow, I was able to finish a half-decent Benchy, then put in an Ultibots FSR kit for autocalibration.
It would not finish a full `G33` pass without probe failure. Sometimes the effector would seem to drift too high when going from the X to the Y tower. I started down this path when I tried to print items that were within the supposed 200mm print diameter, but I'd end up printing in the air half the time.
Now, `G33 P0` and `G33 P1` pass every time. Sometimes I can get `G33 P2` to pass, which I believe is just probing center, and the 3 towers. I have only been able to get it to pass P2 at all with my printable radius set to 80mm rather than 100m as desired. `G33 P3` has never passed, this is when it does a triad of probes at the center, then starts probing in a circular manner counterclockwise around the bed. It usually starts floating upwards and failing shortly after the X tower.
Here's my fork in GitHub with a diff against the default Configuration.h (which is cartesian, but still highlights my changes) [github.com]
Here's the output from the terminal, sans temperature updates: [gist.github.com]
In short, I connected, ran M503 to show delta settings etc, then went through the G33 commands to failure.
Come to think of it, occasionally when attempting to home after a successful print, it will also fail and require reset. None of my prints ever get anywhere near the top limits. I don't run EEPROM, and I leave software endstops enabled at all times.
I could also upload some video to Youtube later, shots of Benchy or other recent failed prints if that would be helpful.
Thanks!