Missing Steps - Cant Print SpreadCycle StealthChop tuning help

droftarts

@oc_geek However, a low changeover speed should still work, just be quiet when not moving. I tested that as well, yesterday, couldn’t provoke skipping.

Ian

droftarts

@oc_geek do you change the mode after config.g is run? @dc42 is not sure that M569 reports the current state of the driver, but the one before. So if you set spreadcycle in config with M569 D2, but switch to stealthchop for stall homing, then back to spreadcycle, M569 may still report the stealthchop mode. I didn’t get a chance yesterday to check this, instead sent command to set mode twice, just in case.

Ian

dc42

@droftarts said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

@oc_geek do you change the mode after config.g is run? @dc42 is not sure that M569 reports the current state of the driver, but the one before.

I have verified that M569 does report the correct state, at least in the firmware at https://www.dropbox.com/sh/dupd9u1xppr1om5/AADYg4guuj2n8LJokVqtK-C7a?dl=0.

oc_geek

@droftarts said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

@oc_geek do you change the mode after config.g is run?

Ian

No i don't.
I had force spread-cycle in config.g (or to say i did but it got messed up...) via M569 D2
I now restated it in config.g...
will continue trying that mode and report if anything happens (hope not)

I have a Voron 2.4, it doesn't run any stall homing thing...

thanks

Argo

@droftarts

So it does look like the main issue was solved with the new beta FW.
Interesting that he needs V2 in his config to put the drivers into StealthChop. With my Mini5+ StealthChop mode is by default on and I do not have to set any “V” parameter.
Still I’m curious why this hasn’t been in issue with my Mini5+ as we have quite similar Prusa Styles printer’s.
Maybe revision of the MCU? I remember having a skipping extruder with 3.3b2 which after flashing and compiling firmwares back and forth wasn’t reproducible anymore. During that time I also had timeouts but the fact that I could not reproduce it was annoying from a debugging standpoint.
I’m also glad you confirmed the capabilities of TMC2209s StealthChop (300 mm/s). Here and there you can hear voices that assume it’s only usable for low speeds but for belt driven 3D printer’s it’s well beyond what we need and what will also produce decent prints in terms of ringing.

Nevertheless I’m glad we have a working firmware version now. I also will continue testing the LDO 0.9 motors with the new FW version but that’s maybe worth a new thread then?

oc_geek

@argo working with SpreadCycle... which we are testing

Stealthchop caused layers shifts to me tonight

dc42

@oc_geek said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

@argo working with SpreadCycle... which we are testing

Stealthchop caused layers shifts to me tonight

Stealthchop can't react to sudden changes in load, such as when the print head hits a blob or overhang when travelling at speed. For this reason, I advise against using stealthChop at high speeds.

oc_geek

@droftarts said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

@oc_geek please post config.g. Looks like you have a low changeover speed to spreadcycle, does it mostly print in spreadcycle?

Ian

Hi Ian,
which speed do you suggest to set for the mode swicth over ?

Currently i'm forcing D2 but i may try differently

thanks

Argo

@oc_geek

Though it’s not RRF but my printer with Klipper I use 200 mm/s travel speeds for draft prints and 160 mm/s infill speed for infill. External perimeter speed is slower (75 mm/s) because it’s just a bed slinger printer and would ring too much.
Bord is a cheap SKR 1.4 + TMC2209 in StealthChop mode.
Cornering velocity (comparable to jerk) is at 5mm/s as Klipper advises against going higher with input shapers and acceleration at 3.000 mm/s (going higher would be possible but then fine details get mushy because of too much input shaping).
Luckily so far I haven’t had any issues with shifted layers. During travel speed I use a Z hop height of 0.2mm so it does not hit anything.

The last time I had trouble with StealthChop having layer shifts was with the old 8bit Prusa EINSY board and TMC2130 drivers.

I do not remember but are you having layer shifts with 1.8 or 0.9 motors?

oc_geek

@argo ...sorry to say but all that it doesn't seem to be much relevant in here...let's please try to keep the replies on issues found on RRF / Duet
the tread is already long enough for the folks to work it with..

besides i have 0.9 OMC on A/B/Z

Argo

@oc_geek

0.9 I see. I also had issues with 0.9 + TMC2209 on different boards and firmwares (Marlin, RRF).
At what speeds does the layer shift happen or is it somehow possible to easily reproduce it? I’m happy to add data to the matter with two sets of 0.9 motors from LDO and StepperOnline.

oc_geek

@argo said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

@oc_geek

0.9 I see. I also had issues with 0.9 + TMC2209 on different boards and firmwares (Marlin, RRF).
At what speeds does the layer shift happen or is it somehow possible to easily reproduce it? I’m happy to add data to the matter with two sets of 0.9 motors from LDO and StepperOnline.

If you find issues on your end please report here.

droftarts

@oc_geek said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

which speed do you suggest to set for the mode swicth over ?

Currently i'm forcing D2 but i may try differently

Yesterday I tested at D3 V40 (I think), which was around 3mm/s from memory. This was below the jerk value, and seemed to work well, but I was running short air prints and fast test moves, not an actual print. Again, i set this in config and didn’t change it after reset.

Ian

oc_geek

@droftarts @dc42

Configuration is :

Rel 3.3 beta 2+2
Forced SpreadCycle (D2)
Mesh active

Still getting layer shifts
(see below at back after couple of layers)
I stopped the print - it produced a sound when that happened

Dumps:

droftarts

@oc_geek what exact motors do you have?

Ian

oc_geek

@droftarts said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

what exact motors do you have?

OMC Steppers On Line
17HM19-2004S (0,9 deg) - on 4xZ, A and B
17HS08-1004S (1.8 deg) for the Extruder in Afterburner (aka Clockwork)

P.S. These are the ones used by folks which have 0.9 OMC in Voron 2.4

Argo

@oc_geek

; Accelerations and speed are set in a file
M98 P"/macros/speed_printing.g"

What speeds are you using to force the layer shift?

I'm going to do a test print with LDO-42STH48-MAC 0.9 motors at 200 mm/s travel speed and 3000 mm/s acceleration forced into SpreadCycle.
Are those speeds high enough to force the error on your side?

oc_geek

@argo said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

@oc_geek

; Accelerations and speed are set in a file
M98 P"/macros/speed_printing.g"

What speeds are you using to force the layer shift?

Yust to be clear ...
i'm not forcing anything... i'm just trying to print...without success

oc_geek

@argo said in Missing Steps - Cant Print SpreadCycle StealthChop tuning help:

@oc_geek

; Accelerations and speed are set in a file
M98 P"/macros/speed_printing.g"

What speeds are you using to force the layer shift?

I'm going to do a test print with LDO-42STH48-MAC 0.9 motors at 200 mm/s travel speed and 3000 mm/s acceleration forced into SpreadCycle.
Are those speeds high enough to force the error on your side?

these are normal Voron 2 speeds and accelerations

dc42

@oc_geek, please load the firmware at https://www.dropbox.com/sh/dupd9u1xppr1om5/AADYg4guuj2n8LJokVqtK-C7a?dl=0. When you observe the problem, pause the print and run the following command for values of # from 0 to 4:

M569.2 P# E0

Post the results here.