Topics created by jbarros

Just to close the loop, super speedy RMA process, new board has helped chew almost an entire spool of filament 😊 👍

@jbarros 2A RMS is the theoretical limit of the TMC2209, unachievable in practice except for very short periods or using cooling methods that are not practical. It is unfortunately very common for power semiconductors to have current or power ratings that are way higher than can be achieved in practice.

Section 20.1 of the datasheet makes it clear that the 2.8A rating is possible for intermittent use only (1 second on and one second standby). It suggests 1.4A RMS as a design guideline.

However, the Duet 3 Mini provides a much greater heatsinking area than plug-in drivers do, so you can more easily keep the drivers cool, using a fan that blows cool air along the line of drivers on both sides of the PCB.

@jbarros thanks for confirming.

@jbarros said in Duet3D 6HC + Toolboard missing filament on curves:

@dc42 said in Duet3D 6HC + Toolboard missing filament on curves:

@jbarros, please try the latest unofficial 3.3beta main and expansion board firmware. It solves all the issues we are aware of except for a very slight reduction in actual vs. requested extrusion.

Per your previous comments, rounding issues?
Do you know the loss % and do you believe it's fixable?

It was well under 1%. I think one user reported it as 0.18%. I've already fixed it for the case that pressure advance is not in use.

So just to add some more data into this issue, I actually got some apparently real readings from my DHT22 (it's around 20ºC in this office) even if briefly.
I was doing a G32 Bed Levelling at the time.
Could not replicate with another G32.

6a60b311-c3cd-4486-8cd4-5a30c6ddf63a-image.png

And....while writing this I got another reading while the printer is idle:
a0aea57d-e7ac-46fe-918e-21a049588ad3-image.png

@dc42 when I read your question it all made sense 😄
I was wiring to the daughter board output pins but using the 6HC pinout.
Of course CS2 and CS3 will be on the daughter board's output pins at 6HC's CS0 and CS1 pinout!

I'll add something to the wiki to make it easier for the next guy.

Thank you Sir!

Thanks, I will look into it. You may be able to use mode 8 to do a quick probe.

Issue still present with 3.2 beta3 and corresponding Toolboard update

Thank you!