Hiya, We have recently been given a Lulzbot TAZ4,

3D Printing
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1

Hiya,

We have recently been given a Lulzbot TAZ4, and we are having issues with printing.

It would seem that we have issues with the head not always moving up at the correct rate.

We tried to print a sensor holder ( https://www.thingiverse.com/thing:617615 ) and when the circular hole wasn’t anywhere near circular we did a calibration print ( https://www.thingiverse.com/thing:24238 ).

As you can see from the images the height issues don’t seem to match between the two prints.

The calibration print (5mm cubes) had heights of 3.95mm (bottom cube), 3.76mm, 4mm, 4.4mm and 5mm (top cube).

We’ve done a lot of googling and not found a solution, could we have issues with steppers not stepping, or is it likely a more fundamental problem?

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2

It’s likely that your X/Y/Z/E Axis Steps_per_mm setting in the firmware are all incorrect.

It could also be an issue with steppers not stepping, but generally that’s noticeable and will be irregular instead of regular like you’ve got.

3

Send an M92 command to the printer, and see what they are currently set to. It should echo back its current settings.

4

I believe it should echo back 100.5, 100.5, 1600, 800ish…

5

Thank you, we’ll try that and see what it says.

6

If it reports something back other than the 100.5, 100.5, and 1600 numbers…then enter this to fix it:

M92 X100.5 Y100.5 Z1600
M500