regarding warping I noticed that parts close to edge of perf board seem to warp more than if they were closer to center of board
Or put another way, warping gets worse the further one gets from the object center. That make sense, I think, shrinking stresses are probably additive with length and portions of the print close to the outside edge are more free to move than the area near the center.
Or put another way, warping gets worse the further one gets from the object center. That make sense, I think, shrinking stresses are probably additive with length and portions of the print close to the outside edge are more free to move than the area near the center.
that is not what I meant, if the same part with same dimensions is printed in center of board it will get no warping, but if the same object is printed on edge of the print bed it gets massive warping especially near the edge. I think it has to do with heat distribution across the board.
Tighten down all your calibration screws because it sounds like you are super loose which could cause printing issues. The plate should not move if the nozzle touches it, check the magnets for any objects that might be hitching a ride.
-NS
i can't start the calibratio from bottom position of the plate, because, even if the back is leveled, when it comes to the front it ask me to lower it, but it's already in the lowest possible position.. for now i calibrate the printer starting more or less at a medium height, but i often end up with the back of the plate at the same level of the centering screw's heads or even higher.. i can't get a full 0 calibration as i was used before the v1 firmware
that's the results of the calibration, i was capable of having all 0 or max 0.1 in one corner now i can't get near
that's the results of the calibration, i was capable of having all 0 or max 0.1 in one corner now i can't get near
this is o.k., I bet you won't print that model even with 0.0 at every point anyway.
If you want to get the printer calibrated better you could try the 'perfboard maintenance' by cleaning and bending it.
After that you should treat it with ABS-slurry.
Next redesign your model for lower shrinkage stress.
Finally print it with a closed chamber.
that is not what I meant, if the same part with same dimensions is printed in center of board it will get no warping, but if the same object is printed on edge of the print bed it gets massive warping especially near the edge. I think it has to do with heat distribution across the board.
Heat distribution across the board from the heater and cool down from ambient air both working against each other.
Solved for industrial printers with heated chambers that ensure a stable temp environment while printing and also controlled cool down after print job.
that's the results of the calibration, i was capable of having all 0 or max 0.1 in one corner now i can't get near
Your bed is probably slightly warped either due to material under the perf plate, or the perf plate being warped. Take the PCB bed off the z-table and clean any plastic that may have made its way under. Then do the PCB heat bed bend thing to get the center as the low spot (so when you screw it back down, the center is pressed against the table). After cleaning the plastic out, if you can tap the center point and hear there is space between the PCB bed and the Z axis table, you need to do the bending some more.
http://support.zortrax.com/cleaning-the-platform/
http://support.zortrax.com/straightening-perforated-plate/ They say you don't need to do this for V2, I found that not to be true.
From m200 maintenance list:
Cleaning the bottom of perforated plate each 300 working hours Perforated plate straightening Each 200-300 working hours or if necessary