Topics created by PropellerHat

Oh heck... Just found the flat between Duet and Duex being a tad loose. Stuff making a lot more sense now after pushing that corner in.

Hi

Filament is dry, no other snapping than the described type. I have experience on wet filaments so I know this is not the case.

There is no skipping or other weird movement in the pulley.

You can increase the time allowed to reset a heater fault, it's the S parameter in the M570 command.

Great, thanks 🙂

I've tried this, I switched my extruder to 1/4 and it was not interpolating, and it meant my other axes were not either, noisier but not as much noisier as I expected. It reduced my missed steps for extruder which I was getting but then with 4200 steps/mm on 1/16th, and a 30:1 gear reduction, a few missed ones is not going to affect print quality so I'm back on interpolation for all axes.

It should not have changed. G10 P4 S260:260 followed by T4, or vice versa, should turn on both heaters. I'm not sure about M104 S260 because the M104 command was not intended to control multiple heaters.

EDIT: I just checked the code. T4 followed by M104 S260 should set the active temperature of both heaters and start heating them. But M104 S260 followed by T4 won't, because the M104 S260 command will refer to the currently-selected tool (if any).

Yep that worked!

Super nice 🙂

Thanks!

Please continue this discussion at https://www.duet3d.com/forum/thread.php?pid=30216#p30216.

Oh yes, retract on layer change. That would do it.

Now running the printer with the new belt without issues (so far).

I have been searching signs of mechanical hit but not found any evidence. Also there is a bit flex in the machine because of the dimensions and it not being made out of cast iron so in these speeds and with these forces the conical nozzle should be able to climb a bit if meeting a blob. I have been manually testing how much force there has to be applied to make the X and Y skip steps and it is considerable.

The current is around 2 amps, I have been playing on both sides of that in search of well running settings with my external DM542A and DQ542MA drivers. The motors are separated from the build chamber, enclosed and cooled. Drivers stay nice and cool.

I was earlier not able to get the Zhop working (using Cura) but now will put more effort on that. It may have been caused by the short signal width that I now have changed into 3 microseconds.

The pulleys and belts and shafts are tight and playfree.

Temperature related binding in the linear rail has been under consideration but they are from a quality manufacturer and I would expect the error then continuing from a certain timepoint on or at least be more frequent. Instead the layer shift happens only every now and then, and after a shift the print continues beautifully untill the next shift that comes randomly at some point.

Power related issues have been thought too, but they're not probable with the UPS (and surely would be weird affecting only X as you said.)

All right! Now the test piece came out straight!

So great to get fast solutions from here 🙂 If only I would'we cried here earlier…

Thanks!

Ahh. Didn't know that about IDEX printers. Thanks for pointing it out.

Hi

I managed finally to get the heaters running by inverting the logic of the power mosfets. Now the heater channels 3 and 4 are working the same as the standard 1 and 2.

One curious thing popped up though: "Temperature reading fault - Temperature above limit" on heaters 1-3. This pops up in the console when heating to 260 degrees and when the temps rise a bit over before settling (about 265 degrees).

I put the M143 S340 to not trigger the safety turn off but anyway around 265 the 3 heaters get this error message and shut down while heater 1 continues to hold nicely the target temperature. Heaters 1 and 2 are connected to Duet the "normal" way.

EDIT:

I managed to run the autotune for all the heaters after several tries with different PWM:s ( ended up using P0.55 and P0.6 to get the tune done and not ending in error).
Nothing changed regarding the behaviour of heating up - H2-4 still get the error message "Temperature above limit" allthough there is more than 70 degrees overhead (M143 S340).

EDIT: Fixed! By setting the M143 separately for all the heaters (for example M143 H1 S300)

Tim you can run macros (named sub programs, stored on the SD card) using a gcode (M98 PMacroname.g)
https://duet3d.com/wiki/G-code#M98:_Call_Macro.2FSubprogram
sub programs end at end of file or M99
macros call call a file anywhere in the SD card with absolute paths so its viable to write a macro file that prints a /gcodes/file.g as many times as you want.

I think a dedicated print queue is nicer but it could be a gcode file that is stored on the SD card that looks to all intents and purposes like a macro.