My G&C CoreXY printer has always been a little noisy, but since fitting a direct extruder and its stepper motor to the carriage, the noise has become more obvious. I think the increased carriage mass has affected everything, resulting in a lot more resonance and buzzing. I have been making some parts for this printer on my Prusa i3 and the difference in noise levels is very noticeable!
If I move the carriage by direct commands at any speed it's fairly quiet, but it's far noisier when printing. Any move that involves both X-Y motors - e.g. a straight line in only the X or Y direction - results in quite a bit more noise. The noise when printing circles is especially loud and annoying. It's as if the 2 motors are resonating with each other, or interacting in some way.
All fasteners are tight, and the belts have enough tension to 'bong' when plucked - it think the belt tensions are equal, as far as I can tell.
So now I'm looking for some help and guidance:
1. Can anyone suggest some diagnostics to help narrow down the cause of this noise?
2. Can anyone suggest some solutions? People have spoken in the past about using 0.9 degree steppers instead of 1.8 degree ones - would this help? And is changing over simply a case of swapping the X-Y motors and doubling their steps per millimetre values?
3. Are there any changes I could make to the configuration of my Duet 0.6 board to reduce noise? I have attached a copy of my config.g file, if that helps (ignore the 'M92 E600' line - this file was copied from my backup - it's now 'M92 E102').
Also, I said above that my drive belts are tight - could I have them too tight? When I first built the printer I used those rubber mountings to reduce vibration, but the belts pulled the motors over at an angle, so I had to remove them and use the thin cork dampers. How can I tell whether the belts have the proper tension?
All helpful suggestions appreciated!
If I move the carriage by direct commands at any speed it's fairly quiet, but it's far noisier when printing. Any move that involves both X-Y motors - e.g. a straight line in only the X or Y direction - results in quite a bit more noise. The noise when printing circles is especially loud and annoying. It's as if the 2 motors are resonating with each other, or interacting in some way.
All fasteners are tight, and the belts have enough tension to 'bong' when plucked - it think the belt tensions are equal, as far as I can tell.
So now I'm looking for some help and guidance:
1. Can anyone suggest some diagnostics to help narrow down the cause of this noise?
2. Can anyone suggest some solutions? People have spoken in the past about using 0.9 degree steppers instead of 1.8 degree ones - would this help? And is changing over simply a case of swapping the X-Y motors and doubling their steps per millimetre values?
3. Are there any changes I could make to the configuration of my Duet 0.6 board to reduce noise? I have attached a copy of my config.g file, if that helps (ignore the 'M92 E600' line - this file was copied from my backup - it's now 'M92 E102').
Also, I said above that my drive belts are tight - could I have them too tight? When I first built the printer I used those rubber mountings to reduce vibration, but the belts pulled the motors over at an angle, so I had to remove them and use the thin cork dampers. How can I tell whether the belts have the proper tension?
All helpful suggestions appreciated!