Dimension Error in X / Y with my delta printer
-
Hi!
I started tuning my new (first) delta with the duet wifi. By the way I am amazed by this board using 0.9 deg/step motors the fan of the E3D @24V is the loudest noise when printing!
Ok now the problem: I have printed several objects like a 20x20mm square etc. and I constantly get 20.25mm instead of 20 in X direction. Y is fine, Z, too.
Autocalibration ends always around 0,064.
Is there a solution for tuning this in the firmware? I guess it is a problem coming from the mechanics?
Would be happy about some help.Bye, Boris
-
It's something like: one less well tensioned belt, one rod pair not as well matched, or play in one set of joints. If it were equally off in x and y it would be diagonal rod length being off.
-
okay, thats interesting. Indeed the X-Belt is not as exact the same as y and z but far away from sluggish or whatever. I´ll tighten that one. Play is not there as seen by the eye on every joint. A gauge will find some for sure. Good points with the rods. I will check that.
I thought that there is a compensation available somewhere in the firmware. I could compensate that while constructing parts, too. But knowing that there is something wrong would drive me nuts…
Thanks!
Boris -
To get the belts to the same tension use a frequency meter while plucking the side that is not connected to the carriage. Free app from Hutchinson belts called "Easy Tune" works good.
-
@Alexander:
To get the belts to the same tension use a frequency meter while plucking the side that is not connected to the carriage. Free app from Hutchinson belts called "Easy Tune" works good.
iOS App? Android? I'm not seeing it on the iOS App store.
-
I thought that there is a compensation available somewhere in the firmware.
Check out M579.
https://duet3d.com/wiki/G-code
I used my 100mm XY square, and used M579 to tweak values on my T3P3 Kossel Mini.
You can ignore the instructions, as they are written for the Prusa i3 MK2 cartesian printer, but the square can work here.
https://www.thingiverse.com/thing:2050876
John
-
-
I thank you very much for your suggestions hints! Tweaking the mechanik to have a clean functional built is one thing I would like to achieve and getting the ounce out of precision I ll do the firmware tweak which John pointed out!
Thanks a Lot for your help @all!
Bye
Boris -
