Issues with pressure advance since RRF 3.4

Argo

Looks like I’m not alone with the issue anymore. Any news of an possible fix? And if possible, can we somehow assist in collecting more data (debug firmware with more logging?) for you to fix the issue?

gloomyandy

@MartinNYHC That's a very useful test. If you are interested in running more tests, then trying the same print with an older version of the firmware (probably pre input shaping so 3.3) might provide some interesting input. It would also be useful to run the same test (on 3.4.3) with input shaping disabled.

It also looks to me as if you could use a higher value for the pressure advance setting on that print (with the input shaping setting you have), did you try that (I see you have a higher setting commented out)?

MartinNYHC

@gloomyandy I already tried lots of different settings within the last few months but that doesn't change anything. The same applies to the RRF version - same results as @Argo starting with 3.4.

gloomyandy

@MartinNYHC It would really help to see the following prints alongside each other. I don't think we really have good examples at the moment. Ideally using the same gcode....

A print using RRF 3.3 (ideally both with and without the toolboard)
A print using RRF 3.4 but with input shaping disabled (again with and without a toolboard)
A print using RRF 3.4 with input shaping enabled (I think we already have these, but it would be good to confirm them with the same settings and gcode).
Hopefully all test prints using the same filament etc.

At the moment we have a lot of examples but I don't think we have a consistent set using exactly the same hardware and gcode. I don't think we have any hard evidence that things changed from 3.3 to 3.4.

The current situation (as I understand it) is....
Argo saw differences going from 3.3 to 3.4, but he also switched from a directly connected extruder to using a toolboard. When he went back to 3.3 (still using a toolboard) the problem he is seeing seemed to also show in 3.3.

Your test posted above seems to indicate that you are seeing a problem with 3.4 and that the problem is the same both with and without a toolboard (however both prints are using input shaping, so that may have some impact on this, most people seem to think that PA needs to be changed when input shaping is in use).

I realise that this is a lot of work, but I think you are in a really good position to test this. I've been trying to reproduce the issue, but have not been able to do so, my understanding is that DC42 has also not been able to reproduce the problems. If there is a difference between 3.3 and 3.4 then having a definitive example would really help.

Argo

@gloomyandy

What I also did change was the hotend when I installed the tool board and installed RRF 3.4.
It’s a Rapido hotend. The same one @MartinNYHC uses. I don’t know how the hotend can be the cause but I could switch back to the Mosquito as my bedslinger with RRF 3.4 also has an Mosquito and no issues.

MartinNYHC

@Argo I also had this issue before I switched from a Mosquito Magnum to Rapido

Argo

@MartinNYHC

Ok… then I have absolutely no clue anymore.

MartinNYHC

@gloomyandy My extruder is clogged Will do the test prints tomorrow.

R4ffers

@gloomyandy I'm also using rapido hotend now, was using a dragon SF. I've just changed from SBC to standalone which hasn't altered the results.

Heartleander81

I have this corner issuse to.
My System

Duet 3 6 hc SBC
Duet 3 1lc
Rapido Hotend
Hextrudort Extruder ( ~ 20mm tube from extruder to hotend )

Test with extruder on toolboard and on the MB direkt but the corners issuse ob both connection.
Test with IS on and off at both connection.
My PA bevor the issuse was 0.035.
When I turned up the PA to 0.04, the wall on the corners open it.

Need you more Info?
Config.g?
M122?

I print a simple Cube with 40x40x2mm

Argo

@MartinNYHC has no access to the printer at the moment so maybe @Heartleander81, could you do these tests? https://forum.duet3d.com/post/297234

A print using RRF 3.3 (ideally both with and without the toolboard)
A print using RRF 3.4 but with input shaping disabled (again with and without a toolboard)
A print using RRF 3.4 with input shaping enabled (I think we already have these, but it would be good to confirm them with the same settings and gcode).
Hopefully all test prints using the same filament etc.

Heartleander81

@Argo

With which file?
Which settings?
I only have PETG filament at home.

oh flashing back to 3.3, I don't know how that works and whether I changed something from 3.3 to 3.4 in the Config.g, I unfortunately don't know anymore either.

The problem with and without Toolboard is. I don't have an adapter and then have to re-solder the cable from the motor every time.

My tests up to now (cube 40x40x2) show that with 3.4.3 the corners are always the same. Whether with toolboard IS on or off and without toolboard with IS on or off. The corners only get smaller when I print a lot slower than 60mm/s

Argo

@Heartleander81

Flashing to 3.3 is the same procedure as flashing ton 3.4.
Just upload the files to the system folder.
Maybe the result will be different with RRF 3.3.
If not then maybe we’ll have to send our printers to Duet3D.

Heartleander81

I use SBC not standalone

Phaedrux

@Heartleander81 said in Issues with pressure advance since RRF 3.4:

I use SBC not standalone

Try this: https://github.com/DanalEstes/DuetVersions

Heartleander81

@Phaedrux

Sorry I doun't understand what I must do.
The git can I clone but what now?

I think I must install ore copy files on the pi but what and who.

‍️

Phaedrux

@Heartleander81
I believe you can also use apt-get to retrieve a specific version.

sudo apt-get install <package name>=<version>

Though I haven't done that myself.

Also see here: https://docs.duet3d.com/User_manual/Machine_configuration/DSF_RPi#downgrade-packages

Heartleander81

@Phaedrux sudo apt-get install duetsoftwareframework=3.3.0 doun't work

Heartleander81

@Phaedrux ok have 3.3.0 on MB and Toolboard. Now I test with is on is off extruder on MB and the same with Toolboard

Heartleander81

@Argo

3.3.0 PA 0.045 Extruder onToolboard

3.3.0 PA 0.045 Extruder on Mainboard

3.4.4 PA 0.045 Extruder on Toolboard with IS

3.4.4 PA 0.045 Extruder on Toolboard without IS

3.4.4 Extruder on Mainboard with IS and without IS look the same

Printed clockwise.
Outer walls, inner walls, bottom layer and top layer all at 200mm/s.
First layer with 90mm/s .
The part is 2mm high with the dimensions 40x40mm.
Layer height is 0.2mm.

; Drive direktion
M569 P0.1 S0 D2 H20 V2000 				; X physical drive 0.1 goes backwards
M569 P0.2 S0 D2 H20 V2000 				; Y physical drive 0.2 goes backwards
M569 P0.0 S1 D2 							; Z1 physical drive 0.0 goes forwards
M569 P0.4 S1 D2 							; Z2 physical drive 0.4 goes forwards
M569 P0.3 S1 D2							; Z3 physical drive 0.3 goes forwards
M569 P0.5 S0 D2 							; (free) physical drive 0.5 goes forwards
M569 P20.0 S1 D2						; E physical drive 0.0 Driver0 tool goard goes forwards

; Motor mapping and steps per mm
M584 X0.1 Y0.2 Z0.0:0.4:0.3 E20.0			; set drivers mapping
M350 X16 Y16 Z16 I1						; configure microstepping 1/16 with interpolation
M350 E16								; configure microstepping 1/16
M92 X80.40 Y80.40 Z800.00 E705.485		; set steps per mm

; Drive currents
M906 X1300 Y1300 Z950 E900 				; set motor currents (mA)
M906 I80								; motor idle factor in per cent
M84 S120 								; set idle timeout

; Acceleration and speed
M566 X1800.00 Y1800.00 Z90.00 E3000.00 P1	; set maximum instantaneous speed changes (mm/min)
M203 X30000.00 Y30000.00 Z900.00 E15000.00	; set maximum speeds (mm/min)
M201 X6000.00 Y6000.00 Z100.00 E1800.00		; set accelerations (mm/s^2)
M201.1 Z40.00								; Homimg smooth ACC


; Accelerometer
M955 P20.0 I10 S1344 R10			; R12 Accelerometer 20:0 type LIS3DH with orientation 10 samples at 1344Hz with 10-bit resolution

; PA, IS
; At config-override.g