Custom/new built, using a Ruida RDC6445G,
Mainboard firmware RDLC-V15.01.19
I’m please needing assistance with the X-Axis calibration, for now.
I calibrate on a long length cut, however a short length cut is inaccurate
Using Nema17 into 2:1 ratio then to belt drive HTD3M 20 Tooth Endless belt.
I believe it’s better to calibrate on a longer cut.
So I do this on a 370mm cut, adjusted in the LB Axis Calibrate section.
Then recut the same 370mm which comes out perfect.
I then go and cut a 20.0mm short piece of acrylic and it measures 19.50mm.
I have replaced the HTD 3M belt and pulleys on the 2:1 gearing.
Have also replaced the actual linear open ended HTD 3M belt. (The new belt is S3M out of desperation and lack of spares. The S3M has a trapezoidal tooth profile but is also 3mm pitch.
I have not yet changed the idler and drive pulleys on the endless belt.
(These are actually HTD3M pulleys)
In summary the problem is basically the same as original parts i installed. My train of thought was that my initial HTD 3M belt was very rigid and measured 2.7mm thick. The specification is actually 2.4mm. The endless belt pullies are 20 tooth (maybe a bit small) and I was wondering if this overly thick belt was maybe causing this problem by not being able to wrap around the small pulleys snugly enough.
I’ve played with belt tension with out much success.
I really don’t have any more ideas right now and still not sure if its hardware or software/settings side.
Anyone have any ideas?
Would anyone care to share their base settings for X and Y axis. (If you using NEMA17 and have 2:1 gearing?)
So i have always started my calibration cuts (370mm) on the left hand side of the engraver.
And then follow the 20mm cut starting at the left hand side.
I now did a test cut (20mm) on the right hand side more or less where the 370mm would have ended.
The result is a almost perfect 20mm cut.
I’m still confused, but maybe this will help with identifying the problem, i hope.
Thank you again!!