20mm x 20mm test square is slighty off square

[Raymo]

Got a small problem... my test 20mmx 20mm cube is comming out 20mm (x) by 19.7mm (y)
I thought it was belt tension so I re-did the belts but got the exact same result.

Can the offset be compensated for in firmware?
Is there a table I can change?

Running Sailfish latest on a CTC with Mightyboard.

Thanks

Ray

[bigo93]

Been told, but not doen this myself yet, that you can go into the Sailfish RepG install folder, and then go into the machines folder and there you will see a list of xml files for different machines.

Open replicator-sailfish.xml with a text editor and then find your new steps/mm and simply replace the old values with the new.

Then reinstall the firmware.

[Raymo]

Nice one, ill give it a try later.

My prints are 2% smaller on the y axis, so I assume one just needs to modify the step/MM by 2%.

I let you know how it goes.

Ray

[bigo93]

I would do it this way

http://reprage.com/post/46062359808/...our-3d-printer

This method also saves on wasting filament on making a calibration print each time.

I think the best way would be to measure and change the steps a couple of times and then print a calibration prints to make sure.

[Raymo]

Looks like a good method, thanks for the link. I'll try this also.