#What could I do to possibly help Increase my Accelerations?

48 messages · Page 1 of 1 (latest)

muted flax
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I am no smart man with this stuff, but I’ll try to give as much info for my build as possible.

This is a 350mm V2.4
I’m running a custom monolith 2wd (so I can use the cnc carriage)
Gt3 belt tensioned to… (3lbs, I used the belt tension from west3d)
Cnc Carriage by cartographer
Xol toolhead paired with escapement extruder
And I’m using beacon as adxl (which probably isn’t the best, I need to get a nozzle adxl here soon)

Any other info feel free to ask and I will try to answer to the best of my abilities

inputshaper_20241123_003244_X.png inputshaper_20241123_003244_Y.png
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I do not know what any of this stuff means, and don’t know if this stuff is any good.

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Also these are 2209 tmc drivers using 1.2 run_current

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What could I do to possibly help Increase my Accelerations?

tacit comet
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You already have 99% similarity which is basically a unicorn. However, your alpha peaks don't quite match up which is more important, frankly. Consider tightening the A idler (right as you face the printer), by 1/8 to 1/4 of a turn.

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That should also move the graph fully into the green space which is the optimum

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It might make a slight difference increasing wise to your accels for IS.

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Ignore the AXES_CALIBRATION_TOOL - it's largely experimental

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I note that you haven't posted a picture of the front of your printer which is part of the recommendations for this channel so please do so.

However, you could improve your x and possibly your y by adding to the resonance section in printer.cfg this line and rerunning it:
accel_per_hz: 100

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I also recommend updating your klipper but before you do, please post your current klipper version and the latest klipper version it recommends to update to so I can confirm the upgrade is safe to do without causing a mess of config for you and pain

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After you've done that, you can do your IS

muted flax
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Kipper version is v0.12.0-85

tacit comet
# muted flax Oops sorry.

Consider zip tying up the two green wires and also the bowden together to minimise multiple sources of vibrations so there is a single path. Ensure that there is sufficient not too tight of a bend for the bowden near the toolhead though

tacit comet
muted flax
tacit comet
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Soon™️ I strongly suspect in the new year, it might not be safe to update klipper - watch this space

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At least without also upgrading the klipper on your toolhead board

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Doable but a hassle

tacit comet
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@muted flax how are we doing?

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Another thing I recommend you install is TMC autotune which should significantly improve your vibrations profile graph amongst other things; possibly your IS as well. Install from here: https://github.com/andrewmcgr/klipper_tmc_autotune - reference motor_database.cfg. My setup looks like this so you want something similar in your printer.cfg:

[autotune_tmc stepper_x]
motor: ldo-42sth48-2504ac
tuning_goal: auto
voltage: 48

[autotune_tmc stepper_y]
motor: ldo-42sth48-2504ac
tuning_goal: auto
voltage: 48

[autotune_tmc stepper_z]
motor: oukeda-ok42hc40-204a306n84
tuning_goal: auto
voltage: 24

[autotune_tmc stepper_z1]
motor: oukeda-ok42hc40-204a306n84
tuning_goal: auto
voltage: 24

[autotune_tmc stepper_z2]
motor: oukeda-ok42hc40-204a306n84
tuning_goal: auto
voltage: 24

[autotune_tmc extruder]
motor: ldo-36sth20-1004ahg
tuning_goal: auto

Customise to your specific motors/voltages etc

worthy yew
tacit comet
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I agree @worthy yew and if you read my subsequent comments that should be obvious

muted flax
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okay, so i cant figure out the whole tmc autotune... i have my drivers at 1.5 A and i used the accel_per_hz: 100 and these are the new graphs. accels dropped drastically, i dont know why though.

inputshaper_20241202_225321_X.png
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i dont think i should run it at 1.5 a anymore

image.png
muted flax
tacit comet
muted flax
tacit comet
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do NOT copy pasta the entire motor_database.cfg file data into your printer.cfg file - that is looked up and handled by the TMC_Autotune klipper plugin.

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Your motors are rated for 2A. This is probably not RMS. Therefore, multiply that number by 0.707 first... this gives us 0.707 x 2 = 1.414. Then to be conservative I wouldn't go above 1.35A; you're running at 1.5A which is likely too high, especially if they aren't actively cooled steppers. To be sure you don't overheat I would go with a maximum of 1.3A and see where that gets you.

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Reth may be able to offer advice on whether these motors are RMS rated at 2A or not but I suspect not. I obtained this data from here: https://magicphoenix.xyz/product/moons-ms17hd6p4200/

MAGICPHOENIX
MOONS' MS17HD6P4200 - MAGICPHOENIX

● High Torque, Low Losses, Small Size, High Efficiency ● Low Temperature Rise: Ideal for 3D printers, significantly less heat than other extruder motors ● Quieter & Smoother: Improved manufacturing processes makes these motors have a higher precision and more stable

muted flax
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like right under this section?

hearty needle
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Hmm, does he really need 64 microsteps guys?

worthy yew
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If you can do 64 micro steps without the mcu giving errors then go for it.
If as you increase speed mcu gives errors change to 32

muted flax
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so is 32 microsteps better for increasing speed?

muted flax
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nope nevermind.

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64 is better

proper vortex
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More steps is quieter and smoother but less torque and is harder for the MCU to run. But if the MCU handles it go for it.

tacit comet
trim iron