Definitive CoreXY Calibration Guide. December 08, 2015 12:07PM |
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Re: Definitive CoreXY Calibration Guide. December 08, 2015 01:29PM |
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Re: Definitive CoreXY Calibration Guide. December 08, 2015 05:32PM |
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Re: Definitive CoreXY Calibration Guide. December 09, 2015 01:24AM |
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Re: Definitive CoreXY Calibration Guide. December 09, 2015 06:42AM |
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Re: Definitive CoreXY Calibration Guide. December 09, 2015 09:00AM |
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patrickrio
If you have a guide that is already made for gantry systems you can point me to I will eliminate the steps for that and just list the guide for all applicable steps. However, so far I have found that information is found in many different places, and I have yet to find a full calibration guide that also lists links to all the appropriate test prints.
My idea is to create a very good guide with all steps and necessary insights and print files all in order and in one place.
Re: Definitive CoreXY Calibration Guide. December 09, 2015 01:53PM |
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Re: Definitive CoreXY Calibration Guide. December 09, 2015 03:10PM |
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Re: Definitive CoreXY Calibration Guide. December 09, 2015 03:25PM |
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Re: Definitive CoreXY Calibration Guide. December 10, 2015 07:50AM |
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Re: Definitive CoreXY Calibration Guide. December 16, 2015 09:23PM |
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Re: Definitive CoreXY Calibration Guide. December 16, 2015 09:48PM |
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Re: Definitive CoreXY Calibration Guide. January 28, 2016 06:10AM |
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Re: Definitive CoreXY Calibration Guide. January 28, 2016 06:15PM |
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JeandreCoetzer
Hello everyone.
I recently built myself a corexy system. For some reason when I move the X axis the Y axis will also move. The Y axis moves fine. It is only when i try to move the X axis that the Y also moves. When I for example tell the X axis to move 100mm it only moves 75mm and the Y axis moves the other 25mm.
Any help?
Re: Definitive CoreXY Calibration Guide. February 02, 2016 01:55PM |
Registered: 11 years ago Posts: 553 |
Quote
JeandreCoetzer
Hello everyone.
I recently built myself a corexy system. For some reason when I move the X axis the Y axis will also move. The Y axis moves fine. It is only when i try to move the X axis that the Y also moves. When I for example tell the X axis to move 100mm it only moves 75mm and the Y axis moves the other 25mm.
Any help?
Re: Definitive CoreXY Calibration Guide. June 12, 2016 04:43PM |
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Re: Definitive CoreXY Calibration Guide. June 13, 2016 08:08AM |
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patrickrio
dual motors can get out of sync which will cause the bed to lose its carefully set level. Don't get me wrong, you can make it work. However, this is a calibration and selection guide for creating a highly accurate CoreXY printer. the possibility of losing a step or even a microstep in one motor and not the other makes the dual motor system a less accurate choice in my opinion and the opinion of many others who have worked toward a high precision printer.
Single motor driving multiple screws through a belt drive will work much better. Pick a bigger motor and drive all the screws at the same time with it. Once you set it up, it will not lose level. If the motor in a single motor system loses a step, it will auto correct with the next z- endstop check by your controller. A lost step with a single stepper in a dual stepper z system will not be auto correctable by the z endstop.
Note, we are talking about z axis with screws above and not belted movements without screws.
Re: Definitive CoreXY Calibration Guide. June 13, 2016 11:31AM |
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Re: Definitive CoreXY Calibration Guide. July 12, 2016 10:39PM |
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Re: Definitive CoreXY Calibration Guide. July 13, 2016 03:41AM |
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DjDemonD
Well here's the theory recounted to me on a dark stormy night in an inn by the docks over a rum...
The two z motors when powered-up can stop at any micro-step position, but when powered off will snap to a full step position. If both motors are at exactly the mid point between two full steps (so for example step 100+8/16ths) and the power goes off, one might go one way to rest on step full step 100 and the other on full step 101. Now they are out of sequence and your axis on one side is a fraction lower than the other side.
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DjDemonD
I've always thought that whilst this is plausible, it can't happen that often and surely averages itself out over time even if it does...
Re: Definitive CoreXY Calibration Guide. July 13, 2016 06:45AM |
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Re: Definitive CoreXY Calibration Guide. July 13, 2016 03:55PM |
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appjaws1
Thanks for the info.
dc42, is it possible to have a facility whereby the power OFF/ON routines ensure that the motors are at a full step? Could this be accomplished in firmware for startup and perhaps a macro for shutdown ?
Re: Definitive CoreXY Calibration Guide. July 14, 2016 07:32AM |
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dc42
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appjaws1
Thanks for the info.
dc42, is it possible to have a facility whereby the power OFF/ON routines ensure that the motors are at a full step? Could this be accomplished in firmware for startup and perhaps a macro for shutdown ?
It would certainly be possible to add a "park" gcode that moves the bed down slightly such that the motors are at an exact multiple of 4 full steps from the starting position. On the Duet WiFi there is a power monitor, so it would be possible to do this automatically when the power goes down - assuming that when the power down is detected, there is sufficient power left to move the motors. This will be much easier with 24V power than with 12V power.
Re: Definitive CoreXY Calibration Guide. March 03, 2021 01:09PM |
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Re: Definitive CoreXY Calibration Guide. March 03, 2021 04:33PM |
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Re: Definitive CoreXY Calibration Guide. March 03, 2021 07:05PM |
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Re: Definitive CoreXY Calibration Guide. March 03, 2021 09:55PM |
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