Topics created by Adamfilip

@Adamfilip just realized i can add the jumper so the fan gets 24v

@oliof Awesome thanks for that!

@Adamfilip No, there is not

@oliof yep I double checked and sure enough wire color was messed up and phases were in wrong order.
only had power at 950ma. works now on different driver

@Adamfilip if you clear out the firmware you should see the Duet come up as a bossa port. alternatively you could try putting RRF back on just to confirm that you can see it over USB (using a terminal program.

@Adamfilip When I installed optical X and Y endstops on my printer I ran a test of the precision of those stops. I added some custom gcode to the slicer so that the machine would rehome X and Y at every layer change. This function can be used in some MarkForged printers to detect layer shifting (a lot of their filament is very expensive, so you'd want to stop a shifted print early). In the MarkForged printers, they count steps to the home position and if the number is off, stop the print because it has shifted.

The result of my test was that my optical endstops were very precise, but homing at every layer change adds a lot of extra time to a print- typically 10-20 sec per layer which adds up over hundreds of layers. Homing at every 10th layer would be more practical.

"Autorecovery from step loss" isn't really recovery because it doesn't fix the problem causing the step loss. It just starts the next layer at the proper position, but that layer may also shift.

@T3P3Tony I swapped the motor for another. unsure if it was the Wires/Connection or motor itself and it solved the problem.

@RandyL00123 see the reply here:
https://forum.duet3d.com/topic/31798/monitor-extruder-stepper-voltage-to-detect-filament-errors?_=1679398375558

@jens55 im not suggesting removing the temp display. just making the chart have tabs, so you can switch from temp, to flow to speed or whatever as you wish

@Adamfilip said in Large Seam Gap with thick nozzle:

@deckingman im limiting max volumetric flow to 12 mm3/sec which isnt pushing the extruder too hard

You didn't mention that in your OP - only that you were printing at 50mm/sec. So what is the head speed in reality with that volumetric extrusion limit applied?

@Adamfilip That's not how PA works. It does indeed increase pressure at the start of a move and decrease pressure at the end of a move. It's because with a "normal" hot end, pressure will build up during a move causing over extrusion at the end, but at the start of a move, it takes time for the pressure to build up sufficiently for filament to start flowing from the nozzle. So it's the same effect as filament oozing from a large nozzle but caused by different reasons. PA might help (even though there may not be any pressure build up) because it will advance the extruder at the start of a move and retard it at the end. But as others have observed, the PA value will only be correct for one non-print move length and will be incorrect for other non- print moves. That's because the longer the non-print move, the more filament will ooze out.

Total noob here for Duet Boards. I have a Modix Big Meter which is basically a piece of crap. Im trying to get it more reliable and I would like to add closed loop stepper motors for the 4 z and 2 y and 1 x or vs versa on the x and y. I have the duet2 wifi and duet 5 expansion boards i just need to know what hardware to get and how to wire it up then change the config. any help on this would be much appreciated. I know electronics well just not familiar with duet boards and adding the closed loop motors. found these are they a good option. thank you

https://www.omc-stepperonline.com/p-series-nema-17-closed-loop-stepper-motor-72ncm-101-98oz-in-with-encoder-1000ppr-4000cpr-17e1k-07

I asked ChatGPT how to roast chestnuts and it gave me very nice looking instructions but didn't mention that I need to score the chestnuts with a knife so they don't explode.

At this point ChatGPT and the likes are amazing, but are still toys. I wouldn't trust them as source of information.

update: replaced the hot motor and new motor isnt getting hot, same setup otherwise. so I assume something was wrong with that motor.

@Adamfilip said in 4 Z Motor Gantry levelling:

@Phaedrux now I need to figure out how to Home Z the Gantry to 4 endstops first and then still use Z probe for general Z homing and Mesh generation

If you have the endstops available, you need to use M574 to create a Z endstop and use all 4 pins with + between them. Make sure the order of the endstops matches the order of the drivers in M584. Then home Z normally with a G1 H1 Z move. Each motor will move until its corresponding endstop is triggered.

Example here: https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_auto_levelling#axis-levelling-using-endstops

You can then follow that up with a G32 to use the probe to do any fine correction if you think that is needed.

I had really hoped this one was put to bed. Alas.

Sounds like there are additional checks planned to help prevent this in the future in coming betas.

@Nordle said in Optical Endstops:

wouldn't it work to just run the sensor from any spare 5V pin on the baord?

Yes, I said that in my reply at https://forum.duet3d.com/post/305741.

@Adamfilip said in Input shaping without accelerometer:

Is it possible to calibrate input shaping without an accelerometer

Can you just print a test tower with different frequency settings and compare results.
since tests are needed to confirm results what is the main benefit of using accelerometer sensor?

Absolutely.

I use custom "after layer change" g-code, in Superslicer, to sweep a range of frequencies:

{if layer_num < 25}M593 P"none"
{else}M593 P"MZV" F{15+(layer_num-25)*1.5}
{endif}

This will use no IS below layer 25. Then after that will use type:MZV (choose your type), starting with 15 Hz. By changing that 1.5 multiplier (depending on your print height) you can end at a specific frequency.

@Adamfilip First, see https://docs.duet3d.com/User_manual/Connecting_hardware/Sensors_endstops#multiple-endstops-on-one-axis

RepRapFirmware only supports one endstop per motor per axis. If your axis only has one motor, you can only have one endstop. If your axis has two or more motors, you can have an endstop per motor, if the motors are plugged into their own stepper driver, and the motors can be homed individually to their own endstop. To do this, see the 'Axis levelling using endstops' section of Bed levelling using multiple independent Z motors

Then see https://docs.duet3d.com/User_manual/Connecting_hardware/Z_probe_auto_levelling#axis-levelling-using-endstops
This describes using two endstops on the Z axis, but it's the same for two endstops on any other axis with two motors.

Ian