possible Z stepper issue?

I just want to rule out I'm not doing something stupid with my config that could lead to anything that would induce the issues seen in my other post.

fix-my-printerWobble V-core 400

klippy_1.log134.29KB

blacksmithforlife•3/3/24, 12:25 AM

Hard to tell from the klipper log. Can you attach your printer.cfg?

LemcottOP•3/3/24, 12:31 AM

printer.cfg25.77KB

blacksmithforlife•3/3/24, 12:41 AM

You redefined a lot of stuff, why?

LemcottOP•3/3/24, 1:11 AM

because I originally had dual hotends set up on the one toolhead

miklschmidt•3/3/24, 1:22 AM

Are you using TR8*2 lead screws?

LemcottOP•3/3/24, 2:47 AM

I am

LLemcott I am

miklschmidt•3/3/24, 3:14 AM

I've never heard anyone have good results with those, but of course i can't say that's what's causing your problems. You definitely don't want 8*8's though, they will spin from the weight of the bed when power is off.

Mmiklschmidt I've never heard anyone have good results with those, but of course i can't say ...

blacksmithforlife•3/3/24, 3:37 AM

I have tr8*2 and don't have issues, but I also use ventermechs so I'm not a typical setup

blacksmithforlife•3/3/24, 3:40 AM

I would start from a normal template and then only modify it as much as you need to get it working. But, I don't think it's software related to be honest.

LemcottOP•3/3/24, 4:01 AM

yeah I didn't have many choices when originally putting this thing together so I had to go with tr8*2 - I don't think switching to x8 will 'solve' the issue but it should spread the issue out enough where it might be less noticeable where I can yknow... actually start to use this thing.

I'm all out of ideas, which is why I was kinda hopeful I might have just been doing something dumb in the config. I appreciate the look into it.

LLemcott yeah I didn't have many choices when originally putting this thing together so I...

miklschmidt•3/3/24, 4:36 PM

Just to rule it out, did you try a print without heating the bed?

LemcottOP•3/3/24, 4:39 PM

Yep

LemcottOP•3/3/24, 4:40 PM

I'm looking into strapping an adxl on to each arm and seeing if I can record anything odd

LLemcott I'm looking into strapping an adxl on to each arm and seeing if I can record any...

miklschmidt•3/3/24, 4:48 PM

worth a shot

LemcottOP•3/3/24, 4:50 PM

Keep em coming, I'll take anything at this point :pepe_sad:

LLemcott Keep em coming, I'll take anything at this point :pepe_sad:

miklschmidt•3/3/24, 5:56 PM

I'm guessing you've already tried swapping the leadscrew nuts, right?

LemcottOP•3/3/24, 5:57 PM

I've rotated them, no change. I'm getting tr8x8s in this week too

LLemcott I've rotated them, no change. I'm getting tr8x8s in this week too

miklschmidt•3/3/24, 5:57 PM

rotated them?

LemcottOP•3/3/24, 5:58 PM

Like z0 to z1, z1 to z2, etc

miklschmidt•3/3/24, 5:58 PM

you mean like swapped them between the other leadscrews? Maybe they're just terrible and you need new ones. I guess the TR8*8's will rule that out.

LLemcott Like z0 to z1, z1 to z2, etc

miklschmidt•3/3/24, 5:58 PM

right, gotcha

miklschmidt•3/3/24, 6:01 PM

If you turn the Z's manually (for example by rotation the couplers by hand) can you feel the force required change at an interval?

LemcottOP•3/3/24, 6:01 PM

Nope, spins and feels like any other stepper

LLemcott Nope, spins and feels like any other stepper

miklschmidt•3/3/24, 6:01 PM

man that's weird af

LemcottOP•3/3/24, 6:03 PM

I have a set of three .9deg motors I've been thinking about swapping to just because I haven't swapped two of the three motors yet

miklschmidt•3/3/24, 6:09 PM

sure why not

LLemcott Click to see attachment

blacksmithforlife•3/4/24, 3:00 AM

Looking at this again, you have the run current as 1.1 which is the uncooled version. Have you tried the cooled driver version (1.6 run current)?

LemcottOP•3/4/24, 3:30 AM

these are not the standard LDO motors, but are close enough once I lower the current

LemcottOP•3/4/24, 3:31 AM

I did run them at both cooled and uncooled default settings, but lowered the current simply because the motors would whiiiiiine that high.

blacksmithforlife•3/4/24, 3:45 AM

I recall the back Z motor needed higher run current because the load is all on one motor instead shared with two motors like it is in the front. You could try increasing it just for Z1 and see if that affects the print

LemcottOP•3/4/24, 3:46 AM

:hmm_parrot:

LemcottOP•3/4/24, 6:31 AM

please see fix-my-printerWobble V-core 400

blacksmithforlife•3/4/24, 12:46 PM

sounds like you got it solved! Good for you on sticking with it and not just selling it

LemcottOP•3/5/24, 2:00 PM

okay, hopefully final question...

these steppers are HOT, like actually can't touch them for more than half a second hot, running at 1.6. tried running at 1.4 and it is a little better, but still dang hot. might try to go back to 1.1 now that I removed all the other stuff and see if it still has any trouble

LLemcott okay, hopefully final question... these steppers are HOT, like actually can't t...

miklschmidt•3/6/24, 1:54 PM

these steppers are HOT, like actually can't touch them for more than half a second hot

So 60C. Not hot, normal

miklschmidt•3/6/24, 1:54 PM

Those are 135C steppers (assuming you're talking about the 2504AC's), and that's only because of the JST connectors.

Mmiklschmidt Those are 135C steppers (assuming you're talking about the 2504AC's), and that's...

blacksmithforlife•3/6/24, 1:57 PM

I believe he is using different steppers (self-sourced)

Bblacksmithforlife I believe he is using different steppers (self-sourced)

miklschmidt•3/6/24, 1:58 PM

Fair enough, still a normal temp though!

Many folks freak out when steppers are hot to touch and forget how terrible a human finger is at acting like a thermistor

LemcottOP•3/6/24, 2:05 PM

Iunno, I used to run CPUs without coolers and could tell the difference between 60, 70, 80C, but that was a whole ago lol.

If I had to guess it was closer to 70, but I suspect it's still fine. Definitely pushing the limits of nylon-cf heat creep but that was expected from the start. I might grab some sinks and fans just because