Ormerod 2 z-Probe / X Carriage hanging at printed parts
Posted by cpbee
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Ormerod 2 z-Probe / X Carriage hanging at printed parts September 23, 2015 03:57PM |
Dear all,
I know that this is a common problem with the Ormerod 2. However, I experience with bigger prints, that the Z-Probe starts to "crash" into the print this leads to small "blobs" that increases the problem until the printer looses a step and continues to print into thin air.
This is annoying
I took the z-probe away and manually homed X and Z ... and the problem continous to exist. This time the X carriage keeps hanging
Is there a solution to this? Is it possible that I mounted my extruder "to low" (with the brass screw)?
I know there is the dc42 probe - but I wonder if there is another solution (e.g. improved x carriage?)
Thanks for your help.
Chris.
I know that this is a common problem with the Ormerod 2. However, I experience with bigger prints, that the Z-Probe starts to "crash" into the print this leads to small "blobs" that increases the problem until the printer looses a step and continues to print into thin air.
This is annoying
I took the z-probe away and manually homed X and Z ... and the problem continous to exist. This time the X carriage keeps hanging
Is there a solution to this? Is it possible that I mounted my extruder "to low" (with the brass screw)?
I know there is the dc42 probe - but I wonder if there is another solution (e.g. improved x carriage?)
Thanks for your help.
Chris.
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Re: Ormerod 2 z-Probe / X Carriage hanging at printed parts September 24, 2015 02:57AM |
Hi,
I try to answer your questions - I can not provide images so far (I angrily ripped off the pieces after 6h of printing and 95% progress....)
1) No the carriage sits tightly on the linear bearings
2) Looking from the front the nozzle does not have a 90° angle to the arm and printbed ... it is maybe 80-85°. This can be probably resolved by a new bearing. But manually moving the arm does not resolve the problem it might even make the problem more serious:
3) I am talking about the z-Probe part:
-->> if the printer prints one part and then jumps to next part the Z-Probe (the small PC
slightly cuts through the still soft print and "ripples" it (small bumps apear). During the next cycle the same thing happens (the bump gets slightly higher). Eventually, the bump gets so high (e.g. 1mm) and the cariage hangs with the z-Probe at the print -> the belt slips and the print is gone to PLA heaven.
The problem seems to get more serious the higher the parts are. Printing small parts is no problem.
I hope I described the problem good enough (even without pictures).
Thanks.
Chris.
I try to answer your questions - I can not provide images so far (I angrily ripped off the pieces after 6h of printing and 95% progress....)
1) No the carriage sits tightly on the linear bearings
2) Looking from the front the nozzle does not have a 90° angle to the arm and printbed ... it is maybe 80-85°. This can be probably resolved by a new bearing. But manually moving the arm does not resolve the problem it might even make the problem more serious:
3) I am talking about the z-Probe part:
-->> if the printer prints one part and then jumps to next part the Z-Probe (the small PC
slightly cuts through the still soft print and "ripples" it (small bumps apear). During the next cycle the same thing happens (the bump gets slightly higher). Eventually, the bump gets so high (e.g. 1mm) and the cariage hangs with the z-Probe at the print -> the belt slips and the print is gone to PLA heaven.The problem seems to get more serious the higher the parts are. Printing small parts is no problem.
I hope I described the problem good enough (even without pictures).
Thanks.
Chris.
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Re: Ormerod 2 z-Probe / X Carriage hanging at printed parts September 25, 2015 10:32AM |
Dear all,
I honestly must say I am embarrassed (or was it really my fault?):
1) I changed the bearing holding my x carriage to a 623. No my nozzle is almost perpendicular to the print surface
2) After having done that my carriage actually hit the bed before the nozzle touched the bed ...
3) I took the carriage apart and turned the nozzle holder piece by 180 degrees (upside down). This lifted the all parts a significant distance from the bed and out of any touching distance.
(4) I do not know if the z Probe still works since I have never used it ... I manually home it before printing.
Therefore I must say thanks to all! Currently, I am happy printing
lets see if the "blobs" reappear
Chris.
I honestly must say I am embarrassed (or was it really my fault?):
1) I changed the bearing holding my x carriage to a 623. No my nozzle is almost perpendicular to the print surface
2) After having done that my carriage actually hit the bed before the nozzle touched the bed ...
3) I took the carriage apart and turned the nozzle holder piece by 180 degrees (upside down). This lifted the all parts a significant distance from the bed and out of any touching distance.
(4) I do not know if the z Probe still works since I have never used it ... I manually home it before printing.
Therefore I must say thanks to all! Currently, I am happy printing
lets see if the "blobs" reappear Chris.
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Re: Ormerod 2 z-Probe / X Carriage hanging at printed parts September 26, 2015 01:58PM |
I do not know which is the correct way but rotating it 180° solved it. BUT I must say, that the Z sensor might be too much away to properly work - I never got the sensor really working. I think only dc42's sensor is the answer.
but rotating it 180° solved it. BUT I must say, that the Z sensor might be too much away to properly work - I never got the sensor really working. I think only dc42's sensor is the answer.
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Re: Ormerod 2 z-Probe / X Carriage hanging at printed parts September 26, 2015 02:09PM |
Quote
cpbee
I do not know which is the correct way
The right way round for the nozzle mount is with the chamfered corners at the bottom. Both the standard sensor and my sensor work best with the bottom of the sensor board about 1.5mm higher than the tip of the nozzle. 2mm is OK but higher than that may not work.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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