Babystepping and 12864 goes crazy

izeman

@jay_s_uk Thanks. Yes, that's were I found it as well. Didn't realize that it was moved though, and thought I was using the "old" structure, whereas in fact I was already using the new one

droftarts

@izeman I've updated the documentation to show a couple of other user-submitted menu systems, https://duet3d.dozuki.com/Wiki/Duet_2_Maestro_12864_display_menu_system#Section_Configuration. Have a look to see how they have implemented baby-stepping. I don't have a 12864 display to check myself, unfortunately.

Ian

jay_s_uk

@izeman i use the ultimate menu files https://github.com/jadonmmiller/UltimateDuetMenuSystem
I believe babystepping works ok on that one

izeman

Thanks guys. My goal is to understand how to write code for menu myself, so I digged a little into it, and I will check the other menu examples as well

izeman

@dc42 have to bring that topic up again as I don't manage to make it work.
Felt adventurous yesterday and tried it during a print and turned the know by ONE notch and the nozzle dropped down by like 7(!)mm in a instant and crashed into the bed really hard.

This is the code, and it's got N521 in it, and babystepping is set to ZERO when I want to alter the value.

button R0 C0 F0 T" BACK " A"return"
text T" "
image R11 C0 L"hline.img"
text R26 C8 F0 T"Baby Step Adjust"
alter C88 D2 N521 
image R51 C0 L"hline.img"

Nothing I see here that I could change. It seems to me that the N521 command is handled hundreds of times instead of only once?!
N521 is working though. As long as the printer IS NOT IN STATE PRINTING everything works perfectly fine and I can alter the value as granular as it's set in the webfrontend.

pkos

@izeman Could you paste how you configure the screen in config.g?

izeman

@pkos sorry. Not sure what you mean?!
Do you want to see code? Or photo of the screen? Or video of me altering the value?

pkos

@izeman In order for the screen to work, you have to first configure it with M918 gcode.
I'd like to see how you have the parameters set for it

izeman

@pkos The screen is working fine. And babystepping is working fine as well - AS LONG as the printer is not in state PRINTING.

This is the output of M918:

M918
Direct connect display: 128x64 mono graphics with ST7567 controller, 2.00MHz, 2 encoder pulses per click

pkos

@izeman Yes, I asked for your specific line configuring the screen in config.g

Reading from the output - change encoder pulses per click from 2 to 4. This should help you, although it will take more rotations of the wheel to make it work properly - not sure if this is something for @dc42 to take a look at - but I had the exact same issue as you did on two different screens and two different duet 3 mini 5+'s (one wifi, one ethernet).

izeman

@pkos Ok. Got it. It's "M918 P2 E2"

I will try, but I highly doubt that it will help. As mentioned: I workes perfectly fine as long as the printer is not printing. I can go inside the bedleveling "menu" and alter the nozzle just as you would expect it to work.

But as soon as it's printing, and this is when you really need the feature as it's laying down the first layer and you want to adjust the squish: You go to babystepping, it shows 0.00, and you turn the encoder BY A SINGLE CLICK and the nozzle moves like 5(!!)mm not 0.01mm as set in configuration. So like 50(!) times as much as it should move. Turning it on step back makes it move like 2mm, 3mm, 5mm ... whatever. It's not consistent.
So completely unusable.

Using the webfrontend and clicking the icons to alter the BS works perfectly fine all the time of course.

pkos

@izeman I know. I am saying I had exactly the same thing and messed up a couple PEI sheets because of it The change from 2 to 4 fixed it for me.

izeman

@pkos said in Babystepping and 12864 goes crazy:

@izeman I know. I am saying I had exactly the same thing and messed up a couple PEI sheets because of it The change from 2 to 4 fixed it for me.

Good to note that I'm not alone. I destroyed THREE perfectly fine PEI sheets by playing with babystepping. Not idea why I refused to learn ....
I now ordered a FR4 epoxy plate. Just need to find a way to attach it properly to a stainless steel plate.

dc42

@izeman which firmware version are you using?

izeman

@dc42 said in Babystepping and 12864 goes crazy:

@izeman which firmware version are you using?

RepRapFirmware for Duet 2 WiFi/Ethernet 3.4.0beta6 (2021-11-06)

dc42

@izeman please check whether 3.4.0rc1 has the same issue. You can print several mm above the bed to avoid risk of damage. I recall doing a fix to the 12864 but I can't remember the details.

izeman

@dc42 Sure. Will do so when back home. Thanks

dc42

@izeman also, please check that the cables to the 12864 display don't go anywhere near any stepper motor wires. One possibility is that it is interference to the signals from the rotary encoder that is causing the problem.

I will also run some tests here.

EDIT: I've tested in on a simple non-extruding print job on a Duet Maestro, and babystepping is working correctly for me. The menu entry I am using is:

; babystepping
text V4 R52 C0 "Baby step "
alter V4 N521 D2

izeman

@dc42 is there a difference between:

alter C88 D2 N521
alter V4 N521 D2

Well apart from the obvious positioning I guess it shouldn't make a difference if D2 comes before or after N521 ?!

dc42

@izeman correct, it should not make a difference.

Interference from stepper motor wires seems a likely cause to me.