Half a millimeter off and you get... September 05, 2015 12:56PM |
Registered: 8 years ago Posts: 150 |
All errors 0.5mm at z tower and on the R (+x) side Note, values without direction Xy-plane z @ carriage too wide symmetric 0,13 0,07 x max/min,y=0 carriage off center sideways 0,23 0,07 x max/min,y=0 max z @ L,R 0,1 carriage too wide one side 0,23 0,13 x min,y=0 carriage turned in xy-plane 0,24 0,17 near X,Y towards y0 max z @ X,Y 0,17 carriage too far out 0.52 0,07 F max z @ L,R 0,11 carriage too far in 0.52 0,07 F max z @ L,R 0,11 carriage too low 0.48 0,17 0,0 max z @ Z 0,44 carriage too high 0.48 0,17 0,0 max z @ Z 0,44 rod too long 0.57 0.26 X and x min,y=0 max z @ x min,y=0 0,3 rod too short 0.57 0.26 X and x min,y=0 max z @ x min,y=0 0,3
Re: Half a millimeter off and you get... September 06, 2015 03:37AM |
Registered: 10 years ago Posts: 732 |
Re: Half a millimeter off and you get... September 06, 2015 04:26AM |
Registered: 10 years ago Posts: 14,672 |
Re: Half a millimeter off and you get... September 06, 2015 08:33AM |
Registered: 10 years ago Posts: 732 |
Yes, one needs to be able to probe the very far sides of bed which are opposite a tower (the ones where the error drops steeply down in the picture). These are the places where one diagonal rod is almost horizontal. Most people do not have bed big enough to probe that far. When these points are not probed then the optimization algorithms cannot distinguish easily between the error in the diagonal rod and the delta radius. Probing errors are comparable to the actual errors and that screws up the algorithms.Quote
dc42
@hercek, thanks for that too. It explains why bed probing isn't very good at establishing the diagonal rod length. I guess it might work if you probed points opposite the towers and outside the normal printing radius.
Re: Half a millimeter off and you get... September 06, 2015 12:02PM |
Registered: 8 years ago Posts: 150 |
Re: Half a millimeter off and you get... September 06, 2015 02:33PM |
Registered: 8 years ago Posts: 5,232 |
Re: Half a millimeter off and you get... September 06, 2015 05:09PM |
Registered: 8 years ago Posts: 150 |
Re: Half a millimeter off and you get... September 06, 2015 05:59PM |
Registered: 10 years ago Posts: 732 |