Doing some tuning. Pretty easy to do, the macros really help with that. The numbers I see are feeling pretty wild. I have only done a few print tests so far but I hope to do more interesting ones today.
Not sure how far to push the max speed and accel, it is already at a silly level. 4x print speeds seems like enough. But I will push on a bit
Always fun to find where the Max is. Then you always know what to stay under lol. I’m hoping you can see some real high acceleration numbers. Would be awesome to compete with the print speed/acceleratons of a Bambu/Voron/RatRig
gahhhhh, dang it. I will look them up. I didn’t even think to see what others are doing.
At this point it just looks ridiculous. 300mm/s @18k accel. My other printers are at like 80mm/s @4k
If I remember right bambu says 500mm/s at 20k
It looks that way now. And next week when its pumping out parts twice as fast you’ll be looking at the others saying WTF lol
good god 500mm/s at 18.5k is frightening
I believe we need a video of this action!!!
okay 500@20k is fine, skipped steps at 22k
At this point I have not tuned square corner or done the input shaping, do either of those come into play here? I would assume square corner does, it is sitting at default.
I think it will all have some effect, but how much I’m not sure. I know after you do the belt tuning then you can run input shaper and that will help you print at much higher speeds/accelerations than you are currently. Although your going to max out that extruder real quick. Input shaping will still help you keep travel speeds up and save you some print time
I have one, it is transferring now.
I am a little surprised at how gently it fails that violent test.
Yup you are right, Measuring Resonances - Klipper documentation, looks like this is enough until I wire up the accelerometer.
Maybe I need to do some non-violent accel print tests for a while. I guess I need the accelerometer for that as well. So accelerometer next.
That’s not near as violent as I was expecting it to be. Actually quite calm. Looks like everything is working really well! Now just need this next week to fly by so I can can get back and start putting mine together!
Maybe add 2 steppers at the front, instead of the idlers? 
I think I can just turn up the stepper current since they are still cold. that and try again after the input shaping.
With that said, 20k is insane, I am not sure why to even go higher but if I don’t find the breaking point one of you surely will.
I wish I had some video of the V4 when I didn’t realize it was pulling the 1000mm/s from my config. At 6k acceleration it was WAY more violent than what you see in your video lol. At least it sure seemed that way standing here in front of it LOL. Well 
Its not printing right now so I’ll be back with a video link in just a few…
5000 accelerations
1000 mm/s
Holy crap. It was that stupid speed the whole time. Running more test now. went from 5k to 10k but only 500mm/s and it worked great, jumped up to 15k, perfect. Just ran a 20k and no skipped steps! Guess I’m going to see how far it can go lol
30k at 500mm/s held. 35k failed and 30k at 600mm/s failed. I think that’s still pretty dang good!!! And that still sounds like something is binding or dragging in my setup so I’m sure if you had a cleaner build than mine it would be even better!
Sounds like I should be able to speed mine up a bit. I’m running 100mm/sec. Not sure on accel.
Having the accelerometer and klipper makes it super simple. It can be very time consuming but defiantly makes it better in the end. I think the belt tuning takes the absolute longest lol. very very small tweaks and then have to wait for it to run again (3-5 min) over and over again till you finally get it right, then you try for just a little bit better and completely lose where you were and basically start all over LOL. For me I do enjoy the tuning process to a point. I have learned a ton and fixed a few things I didn’t even realize were issues along the way.
Yeah all this tuning is tedious…but at least it has results. I swear I have tuned a load of printers and generally it gets to a point that I don’t see any differences (half of that was actually JD not really doing anything in the firmware for a year or two).
I like tuning when you can verify each setting.