Duet 2 Wifi Dual Z issue after increasing esteps

[Norder]

@deckingman
You're right, I mistakenly put pitch and lead together.
I already know what the meaning is.
But I am of the opinion that since threaded spindles in commercially available 3D printers almost always have a multi-start thread, which can be roughly recognized by the angle of the thread path to the longitudinal axis, that the threaded spindle is not a threaded spindle with 8mm lead per revolution, even though I can't see the front end.
The lead screw in the video has less than 8mm lead per revolution, don't you think?

I correct my previous comments on pitch and lead !
Not that anyone is misled.

P.S.:
I only had to correct the text translated by Google.
The German word "Steigung" was translated as "Pitch", which is incorrect.
"Steigung" or "Verfahrweg" is the German term for the English "lead".
Google is to blame.

Google Translate
-- Original Text --

Da gebe ich Dir Recht, ich habe Pitch und Lead irrtümlich zusammengebracht.
Ich weiß schon was die Bedeutung ist.
Aber ich bin der Meinung, da Gewindespindeln bei handelsüblichen 3D Druckern so gut wie immer eine mehrgängiges Gewinde haben, das man anhand des Winkels der Gewindebahn zur Längsachse grob erkennen kann das es sich bei der Gewindespindel nicht um eine Gewindespindel mit 8mm Lead pro Umdrehung handelt, auch wenn ich die Stirnseite nicht sehen kann.
Die Gewindespindel in dem Video hat weniger wie 8mm Lead pro Umdrehung, oder glaubst Du etwa nicht ?

Ich korrigiere meine vorherigen Kommentare zum Thema Pitch und Lead !
Nicht das jemand in die irre geführt wird.

P.S.:
Ich musste nur den von Google übersetzen Text korrigieren.
Das deutsche Wort "Steigung" wurde als Pitch übersetzt, was falsch ist.
Steigung oder Verfahrweg ist der deutsche Befriff für das englische lead.
Google hat Schuld.

[slabstations]

@norder Yea I had bumped the esteps up to 1600 and thats why the motors would stall out like they did in the video. They both move and stutter out, with one side tending to move a little bit more then the other.

[slabstations]

@norder Here is the leadscrews used on the lulzbot mini if that helps!

[slabstations]

@norder I also had the same issue when I was running the stock stepper motors. 400 esteps it would move fine but if I commanded 10mm it would give me 1-2mm, I though something could be wrong with the motors since they are older and thats when I tried the new creality ones and same issue.

[deckingman]

@slabstations You refer to Z steppers in the plural yet your configuration only has one Z stepper defined. So I assume that you have wired the two motors in series to a single driver. IIRC on the Duet 2, that means connecting one motor to ZA and the other the ZB. Is that what you'd done? If so, have you remembered to remove the jumpers?

[Norder]

@slabstations said in Duet 2 Wifi Dual Z issue after increasing esteps:

@norder I have removed the D3 V40 and commented out the M575 and M918 lines. I have not gotten far enough for me to setup the probe offset yet, ran into this problem and have been messing with it since. I do one highend mounted endstop connected to the board. The motors are connected in the Z spot, I removed the jumpers in the second Z spot to plug in the second motor. I had it at 400 esteps originally but when I asked it to move 10mm, it would only move 1-2mm so that is why I bumped them up. But once I added the addition esteps, it started to do what its doing in the video.

@deckingman I've already asked him that.

[Norder]

@slabstations
Recently there was a similar problem here, the motors must be identical, otherwise problems arose when Z1 and Z2, i.e. one driver for both steppers, were used.

If both spindles each have an endstop, or you have a second endstop to spare, then you could set up a Dual-Z so that each Z motor has its own driver. E1 should still be free!?

My printer also runs Dual-Z. It has the advantage that the X-axis can be leveled.
I have self-made HAL sensor endstops, each with an adjustable magnet.

Would Dual-Z be conceivable for you?

Google Translate
-- Original Text --

Letztens gab es hier ein ähnliches Problem, die Motoren müssen identisch sein sonst kam es zu Problemen wenn Z1 und Z2, also ein Treiber für beide Stepper, genutzt wurden.

Wenn beide Spindeln je einen Endstop haben oder Du einen zweiten Endstop übrig hast, dann könntest Du ein Dual-Z einrichten so das jeder Z-Motor seinen eigenen Treiber hat. E1 sollte doch noch frei sein !?

Bei meinem Drucker läuft auch Dual-Z. Es hat den Vorteil das die X-Achse nivelliert werden kann.
Ich habe selbst gebaute HAL-Sensoren Endstops mit je einem justierbaren Magneten.

Wäre Dual-Z für Dich denkbar ?

[Norder]

So 1600 steps are correct.

[Norder]

@slabstations said in Duet 2 Wifi Dual Z issue after increasing esteps:

@norder Yea I had bumped the esteps up to 1600 and thats why the motors would stall out like they did in the video. They both move and stutter out, with one side tending to move a little bit more then the other.

So that I understand this correctly... After you set 800mA for the motors, you tried to let these 800mA run with 1600 steps, so not earlier but now ?

To be on the safe side, please post your current config.g with which you started the last attempt !

[slabstations]

@deckingman No I just plugged the second motor into the second port on the board. I did the same thing on an ender 3 and it worked just fine. The only jumpers I removed were the ones in the second z port.

[slabstations]

@norder Yes I tried with 800mA and 1600esteps and same result as in the video.

[jay_s_uk]

@slabstations what voltage are you running at?

[slabstations]

@jay_s_uk 24v. It even says it on the dashboard, that was one of the first things I checked.

[jay_s_uk]

@slabstations how fast are you trying to move the motors?

max speed you can really run them at before generating too much EMF is 28mm/s (F1680)

[slabstations]

@jay_s_uk Honestly I am not sure, whatever the default is when you control it through the web interface. I started with the creality ender 3 base config in the configurator. I have gotten an ender 3 pro up and running, so I just copied the config and change printer size to fit the lulzbot. Only thing I did different was add a bl touch to the lulzbot, which seems to be working properly, have only gotten as far as retracting and dropping it.

[Norder]

According to the previous information... Motor model / Za + Zb / voltages and speeds from the config.g) this result should be more accurate.
I didn't know the values for "Phase resistance" and "Phase inductance" and I didn't change the displayed value either.

@slabstations :
I asked you earlier whether you have two end stops and possibly want to use E1 and Za for the two Z motors !?

Google Translate
-- Original Text --

Nach den bisherigen Infos... Motoren Modell / Za + Zb / Spannungen und Geschwindigkeiten aus der config.g) sollte dieses Ergebnis zutreffender sein.
Werte für "Phase resistance" und "Phase inductance" wusste ich nicht und habe den angezeigten Wert auch nicht geändert.

@slabstations :
Ich hatte Dich vorhin gefragt ob Du zwei Endstops hast und eventuell E1 und Za für die beiden Z-Motoren nutzen willst !?

[slabstations]

@jay_s_uk I would like the dual z bed leveling. Do you think I should try setting that up and hope this problem goes away, or do you think it could be something I have setup wrong?

[slabstations]

@norder I only have one endstop switch mounted on highend of the left z axis. And setting up two z motors sounds good, I like the bed leveling feature!

[jay_s_uk]

@slabstations it definitely won't hurt as it makes sure everything is level. it may or may not help your issue though.
I would bump your current for Z up to 1200, separate them out as you say (don't forget the jumpers). and map E1 to Z using M584 e.g. M584 Z2:4
Then repost your config, homez and homeall

[slabstations]

@jay_s_uk I followed the instructions from this https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors Hopefully everything is good, I don't want to test it until its been looked over just in case! I really appreciate your time and help!
homeall.g config.g bed.g homez.g