Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level
Posted by Kasahabo
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Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level November 12, 2015 07:36PM |
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paul_delta
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jroever
Finally came across somebody with a Rostock Max mentioning something similar - linked to #define AXIS_RELATIVE_MODES {false, false, false, false} in Configuration_adv.h
Experimentally changed mine to #define AXIS_RELATIVE_MODES {false, false, false, true} and oh what a difference! While my prints were very precise I apparently did not get consistent feed rates which was definitely noticeable
on my translucent PLA prints. My red translucent prints now look like top grade ahi sashimi, while before they looked like, well, cheap plastic
Sounds interesting. Can you please compare the quality with retracts on/off?
Here is the Repetier author point of view:
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Repetier
The default in Sprinter, Marlin and Repetier-Firmware is absolute for a simple fact - precision with small moves. Even if you output 6 digits for relative moves it doesn not really matter if the number becomes less the one step. With 400 Steps per mm the smallest relative E-distance is 0.0025 so with relative mode you can add smaller errors. Nothing spectacular if your moves are a mm or more. That only to understand why absolute is better.
As long as rounding errors are accumulated on the slicer side there should be no difference. On the contrary - if the absolute extruder position would not be reset to zero periodically the absolute method would run out of floating point precision really soon!
I checked g codes from Slic3r with rel and abs mode and it seems abs mode re-bases zero every time a retract happens (in the sample I used about every 8-14mm).
Slic3r did insert the correct M82 or M83 codes to enable absolute or relative modes - so the question is what difference the setting in configuration_adv.h makes!?!
Right now my printer is in service mode ... might take me a while before getting to the base of this - but I will and will also provide some close up shots of the results.
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Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level November 12, 2015 08:02PM |
Quote
jroever
Quote
paul_delta
Quote
jroever
Finally came across somebody with a Rostock Max mentioning something similar - linked to #define AXIS_RELATIVE_MODES {false, false, false, false} in Configuration_adv.h
Experimentally changed mine to #define AXIS_RELATIVE_MODES {false, false, false, true} and oh what a difference! While my prints were very precise I apparently did not get consistent feed rates which was definitely noticeable
on my translucent PLA prints. My red translucent prints now look like top grade ahi sashimi, while before they looked like, well, cheap plastic
Sounds interesting. Can you please compare the quality with retracts on/off?
Here is the Repetier author point of view:
Quote
Repetier
The default in Sprinter, Marlin and Repetier-Firmware is absolute for a simple fact - precision with small moves. Even if you output 6 digits for relative moves it doesn not really matter if the number becomes less the one step. With 400 Steps per mm the smallest relative E-distance is 0.0025 so with relative mode you can add smaller errors. Nothing spectacular if your moves are a mm or more. That only to understand why absolute is better.
As long as rounding errors are accumulated on the slicer side there should be no difference. On the contrary - if the absolute extruder position would not be reset to zero periodically the absolute method would run out of floating point precision really soon!
I checked g codes from Slic3r with rel and abs mode and it seems abs mode re-bases zero every time a retract happens (in the sample I used about every 8-14mm).
Slic3r did insert the correct M82 or M83 codes to enable absolute or relative modes - so the question is what difference the setting in configuration_adv.h makes!?!
Right now my printer is in service mode ... might take me a while before getting to the base of this - but I will and will also provide some close up shots of the results.
I think the relative mode will work better in situations when the nozzle is not able to provide the full flow and the extruder gear starts skipping steps (too much speed, the nozzle is too close to the previous layer/bed). I have such situations with PETG, because of it's viscosity. I'll check it next time with two modes.
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Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level November 14, 2015 09:52PM |
Yes, the hotend must be connected. Regarding the bed wires - there is no dirrerence how to connect because the polarity doesn't play any role.
I'd say that the noise from motors is good sign. They normally make some noise when idle. You can disable them using M84 until nex move.
You can test motors loading RAMPS test code from here :[reprap.org]
It switches on and off all the MOSFET outputs (this will make the leds blink) just be careful not to have the heated bed and extruder heater connected unless you want to heat them. Plus it will move back and forth all the stepper motors.
Disconnect belts, load this code and all motors including extruder should move. And connect the fan to 12v or D9 pin (between bed and hotend pins), you don't want to melt the effector
Edited 2 time(s). Last edit at 11/14/2015 10:28PM by paul_delta.
I'd say that the noise from motors is good sign. They normally make some noise when idle. You can disable them using M84 until nex move.
You can test motors loading RAMPS test code from here :[reprap.org]
It switches on and off all the MOSFET outputs (this will make the leds blink) just be careful not to have the heated bed and extruder heater connected unless you want to heat them. Plus it will move back and forth all the stepper motors.
Disconnect belts, load this code and all motors including extruder should move. And connect the fan to 12v or D9 pin (between bed and hotend pins), you don't want to melt the effector
Edited 2 time(s). Last edit at 11/14/2015 10:28PM by paul_delta.
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