Sensorless homing with TMC 2240 on octopus pro v1.1. | Zero G | Page 1

prisma burrow Jul 28, 2025, 10:57 AM

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I'v tried configuring sensorless homing for 2/3 hours, but I have an issue. As soon as I hit "home all" button or type G28 X, the printer consider itself homed and send "Move out of range" while trying to home.

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sour flax Jul 28, 2025, 12:15 PM

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I think people generally recommend homing to the rear right on these printers. Looks like you have endstop set at 0, which would be left on x, but the printer appeared to move to the right - might have to invert the dir pin. Can you post pictures of stepper cable plugs in the board and tell what model steppers (e.g. 2504; stepper online model, etc.) you're using? And y stepper config

prisma burrow Jul 28, 2025, 12:25 PM

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Speedy power from LDO

prisma burrow Jul 28, 2025, 12:25 PM

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sour flax I think people generally recommend homing to the rear right on these printers. L...

I tried homing y axis only and its going to the back but never stop.

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sour flax Jul 28, 2025, 12:35 PM

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Do you want it to home to the front left (0,0) or the rear right (Max, Max)?

prisma burrow Jul 28, 2025, 12:35 PM

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I don't really care

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I want it to home

sour flax Jul 28, 2025, 12:38 PM

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Currently you're instructing it to home to the front left (0,0) and it appears to be going towards the rear right, so you should try inverting the dir pins on both x and y by putting a! '!' before the pin e.g. !PG1 on y. This should have the toolhead moving in the correct direction, then you move onto choosing endstop position and homing

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Be ready with the power switch in case something goes wrong

prisma burrow Jul 28, 2025, 12:40 PM

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But I mean for now, my y axis is going the right way (back right) but it won't stop if loosing step

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it keeps going

sour flax Jul 28, 2025, 12:41 PM

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prisma burrow But I mean for now, my y axis is going the right way (back right) but it won't s...

The point is, that is isn't going the right way. With your settings it should be moving to the front left. If you don't rectify that it will cause a lot of issues later. It's not stopping because sensorless homing isn't tuned yet.

prisma burrow Jul 28, 2025, 12:41 PM

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Okay I added a '!' and it is now going front, what's next ?

sour flax Jul 28, 2025, 12:47 PM

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I'll be home shortly, and continue to help

prisma burrow Jul 28, 2025, 12:47 PM

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okay

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thx

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Just so you know I followed voron doc to do the sensorless homing

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https://docs.vorondesign.com/tuning/sensorless.html

Voron Documentation

Configuring sensorless homing

Voron Official and Community Documentation

sour flax Jul 28, 2025, 12:56 PM

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-64 should be the most sensitive setting for 2240 sensorless by my reckoning, (i.e. it should immediatley trigger), so something else afoot

uneven zinc Jul 28, 2025, 12:56 PM

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Your homing far too slow, but also either need to run kalico or use homing override macros to lower the homing current

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Sensorless likes to home at around 100mm/s

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Endstop switches are still recommended for most add they just work though.

sour flax Jul 28, 2025, 12:57 PM

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Oh yeah if you havent done that yet the Voron guide you linked covers it near the top

uneven zinc Jul 28, 2025, 12:58 PM

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That's as much help as I can provide, just starting work

sour flax Jul 28, 2025, 12:58 PM

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prisma burrow Jul 28, 2025, 1:00 PM

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I did add the homing.cfg

prisma burrow Jul 28, 2025, 1:01 PM

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sour flax -64 should be the most sensitive setting for 2240 sensorless by my reckoning, (i...

even at -64 it doesn't stop

sour flax Jul 28, 2025, 1:02 PM

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Did you modify the macro to suit your drivers etc.?

prisma burrow Jul 28, 2025, 1:02 PM

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uneven zinc Sensorless likes to home at around 100mm/s

Every time people on this discord recommended to go not too fast with sensorless homing

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Yes ?

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But I might have missed something

sour flax Jul 28, 2025, 1:07 PM

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Looks ok, did you include a reference to it in printer.cfg? include [homing.cfg] not sure if needed

prisma burrow Jul 28, 2025, 1:08 PM

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yup

sour flax Jul 28, 2025, 1:10 PM

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try changing driver_SGT to driver_sgt - i dont expect it to be captial sensitive but lets rule it out. if that doesnt work try setting the value to (positive) 1 and/or 64 and see what happends (be ready on power switch)

prisma burrow Jul 28, 2025, 1:12 PM

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nop doesn't work

formal spire Jul 28, 2025, 1:12 PM

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Oof, don’t do 64, it will slam for sure. The voron docs show you to set homing_speed to 80. Set position_endstop to the same as position_max. Most TMC2240s will fall in the sensitivity range of -1 to 1

prisma burrow Jul 28, 2025, 1:12 PM

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I've tried 63 (64 send a error message) blocking it with my hand and doesn't stop

formal spire Jul 28, 2025, 1:13 PM

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https://klipper.discourse.group/t/understanding-x-and-y-axes-limits-and-homing/10779

Klipper

Understanding X and Y Axes Limits and Homing

The X and Y Axis Klipper needs to know from its printer.cfg settings how far the X and Y axes can safely move without hitting the printer’s frame. It also needs to know where the origin (X=0 / Y=0) is. This origin is the beginning of the usable printer bed. In the following, we assume a Cartesian printer that follows the conventions of a Car...

prisma burrow Jul 28, 2025, 1:13 PM

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This ?

formal spire Jul 28, 2025, 1:13 PM

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Home to position max is what people typically use

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Yes

prisma burrow Jul 28, 2025, 1:14 PM

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Doesn't change the fact that the printer doesn't stop 😅

formal spire Jul 28, 2025, 1:14 PM

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What is your sensitivity set to right now?

sour flax Jul 28, 2025, 1:14 PM

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did you try -1/1?

prisma burrow Jul 28, 2025, 1:15 PM

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-63

prisma burrow Jul 28, 2025, 1:15 PM

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sour flax did you try -1/1?

no

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let me try

formal spire Jul 28, 2025, 1:16 PM

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Set it to 0 on both and try again

prisma burrow Jul 28, 2025, 1:18 PM

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Seems to work for x (not sure) but not working on y

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formal spire Jul 28, 2025, 1:18 PM

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Ok did Y move at all?

prisma burrow Jul 28, 2025, 1:18 PM

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yes it moves

formal spire Jul 28, 2025, 1:18 PM

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Ok, set Y to 1 and try again

prisma burrow Jul 28, 2025, 1:18 PM

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x didn't move a lot

formal spire Jul 28, 2025, 1:19 PM

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Oh, so X didn’t home all the way?

prisma burrow Jul 28, 2025, 1:19 PM

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nop stoped in the middle

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and with 1 y not working

formal spire Jul 28, 2025, 1:20 PM

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Did Y at least move towards home some?

prisma burrow Jul 28, 2025, 1:20 PM

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Yes it still move but don't stop, the motor keep loosing steps

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(New color !!)

sour flax Jul 28, 2025, 1:21 PM

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prisma burrow

that means the homing current macro is working correctly, which is good - looks like the values you need will be somewhere between 1 and -1 as bsleep said. You need to trial and error to find the value that consistently homes correctly

prisma burrow Jul 28, 2025, 1:21 PM

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which would be the most sensitive ?

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I mean 1 for y is doing the same than 63 and -64

formal spire Jul 28, 2025, 1:21 PM

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So Y moved towards home and then kept moving until to emergency stopped

prisma burrow Jul 28, 2025, 1:21 PM

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formal spire So Y moved towards home and then kept moving until to emergency stopped

exactly

formal spire Jul 28, 2025, 1:22 PM

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-64 is most sensitive, 64 is least

sour flax Jul 28, 2025, 1:22 PM

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so try 0 on y

formal spire Jul 28, 2025, 1:22 PM

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So you want to go down from -64

prisma burrow Jul 28, 2025, 1:22 PM

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That's what I tried but -64 is giving the exact same result as 63

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=> loosing steps

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until emergency stop

formal spire Jul 28, 2025, 1:23 PM

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So when you set Y to -64 it homes and then keeps moving?

prisma burrow Jul 28, 2025, 1:24 PM

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yes

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I don't let it go to the end of the rail I stop it with my hand but yes the motor keep loosing steps until I hit Emergency stop

prisma burrow Jul 28, 2025, 1:25 PM

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prisma burrow

This is what you can see here

formal spire Jul 28, 2025, 1:26 PM

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how are you changing SGT? Are you updating config and restarting every time?

prisma burrow Jul 28, 2025, 1:26 PM

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yup

formal spire Jul 28, 2025, 1:27 PM

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if so, don't do it that way. Let's use the command from the voron docs to set SGT

prisma burrow Jul 28, 2025, 1:27 PM

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formal spire if so, don't do it that way. Let's use the command from the voron docs to set SG...

Result is the same

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I first tried this way

formal spire Jul 28, 2025, 1:27 PM

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SET_TMC_FIELD FIELD=SGT STEPPER=stepper_y VALUE=-63

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G28 Y

uneven zinc Jul 28, 2025, 1:27 PM

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Do not define hold current

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And .49 is very low homing current

prisma burrow Jul 28, 2025, 1:28 PM

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I did not, it does by itself define the hold current I don't know how to remove it

formal spire Jul 28, 2025, 1:28 PM

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you'll edit the homing.cfg

prisma burrow Jul 28, 2025, 1:28 PM

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uneven zinc And .49 is very low homing current

That's Voron value, what should I put ?

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This ?

formal spire Jul 28, 2025, 1:30 PM

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you should be able to comment these lines out under the gcode macros for X and Y

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{% set HOME_CURRENT = 0.49 %}
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={HOME_CURRENT}
SET_TMC_CURRENT STEPPER=stepper_y CURRENT={HOME_CURRENT}

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wait no that's wrong

prisma burrow Jul 28, 2025, 1:31 PM

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the 3 lines ?

formal spire Jul 28, 2025, 1:31 PM

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don't do that. Let me look over it a little more

prisma burrow Jul 28, 2025, 1:31 PM

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okay xD

uneven zinc Jul 28, 2025, 1:31 PM

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I only use kalico now for sensorless

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It's far easier, no macro needed

prisma burrow Jul 28, 2025, 1:33 PM

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Do you think it is worth it going for kalico ? I absolutly don't know how kalico works and what it is

uneven zinc Jul 28, 2025, 1:34 PM

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If you insist on using senseless instead of endstops I do

prisma burrow Jul 28, 2025, 1:34 PM

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Would you help use it ?

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That means I have to change the whole firmware ?

formal spire Jul 28, 2025, 1:36 PM

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{% set HOME_CURRENT = 0.49 %}
SET_TMC_CURRENT STEPPER=stepper_x CURRENT={HOME_CURRENT} HOLDCURRENT=0
SET_TMC_CURRENT STEPPER=stepper_y CURRENT={HOME_CURRENT} HOLDCURRENT=0

uneven zinc Jul 28, 2025, 1:36 PM

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I cannot for 9 hours or so, I'm at work

formal spire Jul 28, 2025, 1:36 PM

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that would be the only way to change the holdcurrent with that command

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so in the homing.cfg where you see those lines, add HOLDCURRENT=0 to the end

prisma burrow Jul 28, 2025, 1:37 PM

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uneven zinc I cannot for 9 hours or so, I'm at work

Sad cause in 9 hours it will be very late in France 😅

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I'll try with klipper and the macros

formal spire Jul 28, 2025, 1:37 PM

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you can also change the current where it says 0.49. Maybe bump it up to 0.6

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I'm about to have to go to work myself

prisma burrow Jul 28, 2025, 1:39 PM

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formal spire Jul 28, 2025, 1:39 PM

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ok, remove that then

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hold current will just have to remain set

prisma burrow Jul 28, 2025, 1:41 PM

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I don't understand why it's not doing the same on x axis and y axis

formal spire Jul 28, 2025, 1:41 PM

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so instead of only letting Y move a little bit, have you tried just letting it go all the way back?

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because in that video you're not letting it move very far

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or at least let it go back further than that. Let it get closer to home

prisma burrow Jul 28, 2025, 1:42 PM

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no difference

formal spire Jul 28, 2025, 1:42 PM

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ok

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and it's set to -63?

prisma burrow Jul 28, 2025, 1:43 PM

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0 now let me try with -63

formal spire Jul 28, 2025, 1:43 PM

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ideally -63 won't move hardly at all

prisma burrow Jul 28, 2025, 1:44 PM

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Moving all the way to the bumper

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and not stopping

formal spire Jul 28, 2025, 1:44 PM

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what model is this TMC2240? Are the BTT TMC2240s?

prisma burrow Jul 28, 2025, 1:45 PM

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https://biqu.equipment/collections/motor-driver/products/bigtreetech-tmc2240-v1-0

Biqu Equipment

BIGTREETECH TMC2240 V1.0

BIQU&BIGTREETECH | Premium 3D Printing Components & Upgrade Parts Manufacturer. Get precision-engineered buildplates, displays, mainboards, modules, drivers, and hotends for Bambu Lab, Creality, Prusa, Anycubic, Voron & other major 3d printer brands. Upgrade your print ecosystem.

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So yes BTT drivers

formal spire Jul 28, 2025, 1:46 PM

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what is X set to right now?

prisma burrow Jul 28, 2025, 1:46 PM

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I set both at -63

formal spire Jul 28, 2025, 1:46 PM

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ok

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Do you have homing_retract_dist set to 0 on both stepper_x and stepper_y?

prisma burrow Jul 28, 2025, 1:47 PM

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prisma burrow Jul 28, 2025, 1:48 PM

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formal spire Do you have homing_retract_dist set to 0 on both stepper_x and stepper_y?

not on the y axis

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let me retry

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same result

formal spire Jul 28, 2025, 1:50 PM

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[force_move]
enable_force_move: True

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you added this to your printer.cfg?

prisma burrow Jul 28, 2025, 1:50 PM

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yup

formal spire Jul 28, 2025, 1:50 PM

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and you're sure you have the jumper on the right pins

prisma burrow Jul 28, 2025, 1:50 PM

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hmmm yes should be

formal spire Jul 28, 2025, 1:51 PM

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can you send me a picture of the jumper pins you have set on the board

prisma burrow Jul 28, 2025, 1:51 PM

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formal spire Jul 28, 2025, 1:51 PM

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yep, I'm at a loss here

prisma burrow Jul 28, 2025, 1:52 PM

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😅

formal spire Jul 28, 2025, 1:52 PM

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we might be able to get X working

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but I'm not sure what's going on with Y

prisma burrow Jul 28, 2025, 1:53 PM

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X is moving 2 times before stopping, either with -63 or 0

formal spire Jul 28, 2025, 1:54 PM

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set X to 5 and try

prisma burrow Jul 28, 2025, 1:56 PM

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Moved to the right and kept loosing steps until emergency stop

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looks better

formal spire Jul 28, 2025, 1:56 PM

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ok, so X will work, just gotta find the right sensitivity

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try 1 on X

prisma burrow Jul 28, 2025, 1:57 PM

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X working

formal spire Jul 28, 2025, 1:57 PM

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nice

prisma burrow Jul 28, 2025, 1:57 PM

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it came back a little bit

formal spire Jul 28, 2025, 1:57 PM

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it's supposed to do that

prisma burrow Jul 28, 2025, 1:57 PM

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Don't know why

formal spire Jul 28, 2025, 1:57 PM

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that's part of the macro

prisma burrow Jul 28, 2025, 1:57 PM

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okay

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okay okay

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but for y

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😭

formal spire Jul 28, 2025, 1:58 PM

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for Y, I have no idea

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it seems to be ignoring what you're setting the sensitivity to

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with -63, it shouldn't move at all, or if it it does, it will be just barely

prisma burrow Jul 28, 2025, 1:59 PM

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yup I undertand

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hmmmmm

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why is it possible

formal spire Jul 28, 2025, 2:01 PM

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you can probably set it to anything, the driver will most likely ignore it though

prisma burrow Jul 28, 2025, 2:01 PM

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okay

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May I try on voron discord 🤷‍♂️

formal spire Jul 28, 2025, 2:09 PM

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Can you show me your tmc_2240 stepper_x and stepper_y config sections

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@prisma burrow

prisma burrow Jul 28, 2025, 2:10 PM

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formal spire Jul 28, 2025, 2:11 PM

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Ah

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for Y you have diag1_pin. Change that to diag0_pin

prisma burrow Jul 28, 2025, 2:12 PM

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Okay....

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It's working

formal spire Jul 28, 2025, 2:12 PM

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Yep

prisma burrow Jul 28, 2025, 2:12 PM

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but why did I put 2 jumpers if I only use diag0 ?

formal spire Jul 28, 2025, 2:13 PM

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Remember I told you yesterday in your other support ticket to watch out for that

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Different motors

prisma burrow Jul 28, 2025, 2:13 PM

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but same name ?

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okay

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why not

formal spire Jul 28, 2025, 2:13 PM

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You set a jumper for motor 0, diag0 pin for motor 0

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Same for Y

prisma burrow Jul 28, 2025, 2:13 PM

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formal spire Remember I told you yesterday in your other support ticket to watch out for that

yeah but did not fully understood what you meant

formal spire Jul 28, 2025, 2:13 PM

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Each motors diag pin is referenced as diag0

prisma burrow Jul 28, 2025, 2:14 PM

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okay okay

formal spire Jul 28, 2025, 2:14 PM

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Now set sensitivity to 0 and home Y

prisma burrow Jul 28, 2025, 2:14 PM

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Thanks for your time and this journey through building a mercury 😂

formal spire Jul 28, 2025, 2:14 PM

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lol

prisma burrow Jul 28, 2025, 2:15 PM

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By any chance do you know where I can find the mercury one.1 profile for orca slicer ?

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I'm too lazy to configure the whole profile by myself

formal spire Jul 28, 2025, 2:16 PM

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#1081001088037163088 message

prisma burrow Jul 28, 2025, 2:18 PM

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You are my saver

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don't know if this is correct english but...

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yeah

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It's working !!!!!!!!!

prisma burrow Jul 28, 2025, 2:48 PM

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Damn

#Sensorless homing with TMC 2240 on octopus pro v1.1.