Very spotty prints: what can it be?

[Toddwagner]

I've been trying to fix this issue for weeks now to no avail. When I'm printing something fairly large, the nozzle is hitting the bed between the y and z towers, stopping extrusion. I've calibrated my machine with the delta wizard at least 20 times and it still happens every time. CAN ANYONE HELP ME?!?!

[Gdot]

I have the exact opposite issue where my extruder rides too high between the towers. No matter how many times I ran the delta calibration wizard I could not get below a .11 deviation. After many many hours, I finally unwired (cut the wires so I would not have to completely disassemble) and found the insulator bed underneath was badly warped. I just ordered a replacement tonight. Just a thought.

[Gdot]

Something else I just thought of, in your pictures, the glass bed seems to sit too high. I believe the blocks that hold the bed up should be short side down.

[Toddwagner]

Something else I just thought of, in your pictures, the glass bed seems to sit too high. I believe the blocks that hold the bed up should be short side down.

I tried both ways and the same thing is happening... Do you think the warped insulator bed would really affect the glass too?

[djarmag]

After you do delta cal, do g29 and try again. If it's still bad I would suspect extruder needs calibration or endstops

[Toddwagner]

After you do delta cal, do g29 and try again. If it's still bad I would suspect extruder needs calibration or endstops

Hey djarmag, how would I go about extruder calibration? Also what do you mean by endstops? Adjusting them? I'm fairly certain it is not my bed because I have rotated it in a full 360 degrees in 60 degree increments doing a calibration at each increment; but still hitting the bed in the same place.....