Best posts made by Visionary

My bed is 400x400mm 850W Bang bang controlled DC Aluminum 8mm bed. It does expand initially but settles after target is reached and doesn't rise/lower when heater is turned off/on. Temperature fluctuates +/-0.2 Degrees. The heater is turned always on when temperature goes below target temperature, which I don't think is a good way to control temperature via SSR as it connects so rapidly. Is there a way to add hysteresis to bang bang controlled bed (for RRF3.2 / Duet 3)?

My bed heat expansion:
https://youtu.be/tOQ3MXlgEK0

@o_lampe

Using text editor or simple post processor seems good option though it adds some extra work if it has to be done everytime seperately. I think I can write a program that does that aswell.

Linearity of air flow likely won't be that important because I usually use the same fan values for the entire print (and all same material prints). One option for valve is just to have two elastic tubing and pinch each of them accordingly with servo to achieve desired flow. Many off the shelf ball valves tend to be quite stiff but they probably would work great too.

@fcwilt
That worked! thanks.

I use B5015E24B-BSR fan on my printer. It has high static pressure, which really made it better than few other I tried. Only problem with it is that its quite loud and big (50mm body/frame). I've also noticed that having fan duct go over fan's mouth rather than in it makes it much quieter.

I put voltage divider (10k and 4.7k resistors) between sensor and input on Duet and it seemed to fix the problem.

I solved the issue with first layers (brim) not aligning with body of the part. It was caused by lost steps when tools are switched and the other extruder went to its minimum axis location and hit the other extruder slightly. This only happens with first layer and not with higher layers.

I still have problems with setting offsets. If I calibrate the extruders with any calibration object to correct offsets, offsets on prints will eventually change to something else and a new calibrations is required. This happens relatively randomly and I got about 10 print jobs done with one calibration and after that even the calibration was hard as correcting the values did not give the results it should have.

@jay_s_uk
That would work. I just need to change z gcode commands multiaxis commands in gcode but i need to do similar changes anyways for other reasons. Jogging the "real" z height with one press of a button wouldn't be possible with panel due or dwc or can those buttons be changed to take into account other axes?

@fusedeep

https://docs.duet3d.com/User_manual/Troubleshooting/WiFi_troubleshooting

From Duet documentation:
If you are completely unable to connect, you can remove the SD card and edit the config.g files so that the network setup commands are run at startup

I think found the issue: printed parts (ABS) on X- and U-gantries were attached by M3 bolts were loose. The printed part had given in slightly. Weird thing is that it didn't seem to affect one extruder printing (no shifted layers during printing).

@dc42

Thanks. I still need to do some tuning, but I think I'm getting close. It is possible to see some inconsistencies in black parts of the frog (green glitter hides those inconsistencies). I had line width set
to low (0,38) on the frog, which probably causes the issue along with not quite right extrusion multipliers.

I'll probably post more detailed description on my machine on "my Duet controlled machine" -section when I got the time.

@velvia

Possibly this? (Maximum resolution, Maximum deviation and Maximum travel resolution in Cura) :
https://www.youtube.com/watch?v=Hvw3DrVAeTA