Level-calibration issue

3D Printing 3D Printers
1

When I try to calibrate the level of the printing platform, I find the following issue: The mid point of X-Y is higher than X and Y. The mid point of Y-Z is higher than Y and Z. The mid point of X-Z is lower than X and Z. Why this happens?

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1 Like
2

OK, I have looked and looked at this, and looked again at this. I do not see how it is possible unless your glass is not level!

I know that is not too helpful, but I thought that if I at least replied, your message would get bumped so others can agree or disagree.

3

Sorry but I looked at this also and itā€™s not making any sense to me.

4

I also think this problem is weird. This issue happened after a abnormal printing: Talk Manufacturing | Hubs can find the detailed description hereļ¼‰. I am wondering if itā€™s caused by the abnormal work of stepper motor or motor driver module (A4988).

5

Have you ever met this issue?

6

This is normal for a delta printer that isnā€™t well set up. You need to ensure that:

1) All towers are parallel (use a digital caliperā€™s depth guage to measure this, get all 6 measurements to within 0.1mm)

2) All towers are at exactly 90 degrees to the bed.

Once youā€™ve done this, use this calculator to put in the remaining fudge factors into your firmware.

http://escher3d.com/pages/wizards/wizarddelta.php

Itā€™s a massive pain in the bum, however if you want to print flat with a delta you canā€™t cut corners.

7

Thank you for your reply. I recheck the towers and I can guarantee that they are parallel and nearly 90 degrees. Actually, this printer printed well a few days after I finished building it, but it suddenly printed abnormally in one model-printing process (detail:Talk Manufacturing | Hubs). And then this issue surfaces. I canā€™t find the cause of this issue. Do you know what may cause this?

8

ā€œOK, I have looked and looked at this, and looked again at this. I do not see how it is possible unless your glass is not level!ā€ I too had a problem with this and found out that my glass bed wasnā€™t level. I kept telling a friend of mine that I believe the glass was warped and he didnā€™t think so until the glass bed cracked in half. I have replaced the bed with a metal (thicker) bed. It made a huge difference.

9

if you are describing the bowl/dome effect youll need to adjust the the deltaradius