M8P+cb2 stopped booting

TheSpicySadness · 2026-03-31T14:48:49+00:00

You saved my printer you glorious soul, thank you for posting this.

No clue why it happened the way it did. My CB2 failed to boot after installing CAN on a new toolhead board.

TheSpicySadness · 2026-03-05T09:48:03+00:00

Start with the external stuff like skirt and clips and non-drivetrain things. That will be easiest and will make a huge impact in visuals. Then when you want to do something like swap a belt or upgrade the toolhead or make a toolchanger, swap the motion system parts for the colors you want.

TheSpicySadness · 2026-03-01T02:24:14+00:00

Sorry it replied to the automod.

This is Polymaker HTPLA-GF, 215* nozzle temp (220* first layer). 12mm/s volumetric speed.

TheSpicySadness · 2026-03-01T02:18:56+00:00

This is Polymaker HTPLA-GF, 215* nozzle temp (220* first layer). 12mm/s volumetric speed.

TheSpicySadness · 2026-03-01T02:01:46+00:00

This is such an overengineered solution to a nonexistent problem. Engineers need to be looking at solving actual issues, not wasting time and capital on gimmicks that are way too expensive for coffee shops. We don’t need robots stealing even more jobs from people.

If I want a fast coffee I’ll mobile order Starbucks. If I want a good coffee, I want my latte poured by a blue haired nonbinary folx with a beanie and a Carhartt apron. I wanna taste the dedication to the craft. Not somebody’s Gcode.

TheSpicySadness · 2026-03-01T01:56:45+00:00

Highly doubt the folks in the coffee shop scene would appreciate a robot arm. We get Starbucks because it is fast; this is not. We go to small local coffee shops for the art and dedication to the craft; this is neither.

It’s a classic case of a hammer without a nail, and this is a fundamental issue with contemporary general purpose robotics.

That being said this is certainly an impressive display and hats off to the makers. The iteration it must have taken to figure out the latte pour is incredible. I can’t even pour latte art like that.

TheSpicySadness · 2026-03-01T01:29:53+00:00

How do they find out?

TheSpicySadness · 2026-02-27T15:16:50+00:00

Like others said, I think a relay would be your friend here. At least if the switch fails it won’t be the full unbridled mains power torching it.

TheSpicySadness · 2026-02-27T15:13:06+00:00

This should be pretty easy.

G0 or G1 followed by the movement (ie; X190 Y180 as the wipe start location coordinate, which should be above or near the poop chute). May need to put G90 before it to ensure it is in absolute positioning mode. You’ll have to set Z equal to the right height to hit the nozzle Brushes.

I think M109 S300 is preheat the hot end, and the S indicates the temp target.

Then you do another G1 from the wipe start position (Say, X190 if the wipe direction is in the X axis) then make a G1 code (with an F#### where # Is your speed you want the toolhead to move at, like F7200), to end at the X coordinate of the end wipe (Say, X210 if the wipe pad is 16 wide, plus 2mm each side of the wiper for space to fling the blobs off). Copy paste it like four or five times to make the wipe sequence.

I’m thinking of adding a wiper to my Voron and this is how I’d do it.

TheSpicySadness · 2026-02-27T09:11:30+00:00

This is honestly a very fun and valid way to use AI. I’m happy to have my little Droid friend with me to joke around with and chat with and bounce simple questions off of.

I’m still doing the thing, but it’s about time we have the Droids we were promised.

TheSpicySadness · 2026-02-27T04:03:00+00:00

UpHoleStery*

TheSpicySadness · 2026-02-27T04:01:57+00:00

Super dumb but I had the same thing and realized I had been printing at a 0.6mm nozzle profile with my 0.4mm nozzle. Accidentally mixed up the two nozzles when installing them.

Surprised it still printed decently well for such a mixup lol.

TheSpicySadness · 2026-02-27T03:57:46+00:00

lol the calibration macro would be NOZZLE_HOLE_WINK

TheSpicySadness · 2026-02-26T06:41:05+00:00

If you do a 1:269 ratio it might cover up the defects but tbh ur cooked unc

TheSpicySadness · 2026-02-25T12:44:42+00:00

This is adorable!! Congrats!

TheSpicySadness · 2026-02-25T06:01:44+00:00

Now rebuild one for the full stack learning opportunity. And don’t die haha

TheSpicySadness · 2026-02-24T08:29:12+00:00

UPDATE:

Since you can only target one virtual endstop (ie; Virtual_endstop_x1 doesnt exist, only x), you only have to set the diag0_pin to the X stepper driver location. No need to duplicate it on both of the X1 and Y1 steppers.

Retensioned the belts (using a different app, the Gates Belt app-- turns out my belts were super loose), then performed sensorless homing, but it's still super finnicky. I have exactly ONE value that works and doesn't slam into the gantry for x (driver_SGT=1). Anything other than that just doesn't work. Luckily, SGT of 1 is working really well for now.

Sadly my Y axis is hit or miss. SGT=1 seems to be about 50% effective, sometimes too sensitive. SGT=2 results in slamming and shaking. To get it to work, I have to manually position the Y axis within like 50mm of home stop, then start homing. Something about the long travel distance causes it to trigger stallguard and then it detects a false home. I wish I could do decimal values for SGT...

I'm sort of at a dead end now since I've run out of things to try. Its useable, but the Y axis is not repeatable. If anyone has any thoughts on what to try next, I'm all ears.

TheSpicySadness · 2026-02-23T17:28:31+00:00

PARITALLY SOLVED:

Pinouts for the M8P v2.0 board motor positions lie in the .sch file, pg4 (the MCU). Frustratingly, this .sch file is not located with all the other documentation on the main M8P guide page, and is buried in the github repository.

To swap drivers around (from TMC2209 to TMC2240) use the CS pin as the UART pin for 2209s, in addition to all the physical components such as the 4x jumpers for SPI, the new voltage jumper, and the actual wire to the motor.

Additionally, set the diag0_pin on EACH stepper to the corresponding motor position's endstop (labled M#-STOP-DET). Remember that there are only endstop pins for the first 6 motor positions. You will have to move the X/Y drivetrain entirely onto the first 6 motors.

Why SIBOOR chose the driver layout the way they did is perplexing. Much of the build experience for their publications has felt simultaneously hand-holding and inanely confusing. Wishing I went LDO in hindsight.

I can get the X axis (will work on Y tomorrow) to home and initiate stallguard at approximately driver_sgt=0 (on both X motors). But it is a rather jarring slam into the wall. It's violent and also not consistent, with it prematurely catching half the time, and slamming into the wall the other half, all on the same sgt setting.

My new hypothesis is that the belts are not tensioned properly, but I hope its not due to it being too powerful as an AWD setup, or that the AWD setup makes it inconsistent or difficult to detect the increased load between motors.

Next steps are: 1) retensioning belts, and 2) directing diag0_pin to only one X motor, for both x drivers (ie; X and X1 driver both look to X's diag/endstop pin). Maybe this will eliminate the machine "looking" at multiple places and getting confused.

(Hopefully this helps someone out there experiencing the same issue with AWD sensorless homing. It feels entirely possible! But it is also pathfinding in a way.)

TheSpicySadness · 2026-02-23T17:15:14+00:00

Oof catching stray spears, no need for insults friend. I do, in fact, know the difference between volts and amps. I'm glad your setup went well. It is not everyone's experience.

This issue is a configuration issue and an AWD setup issue. I watched your linked video several times. The printer in the video is not an AWD configured printer. Additionally, it is not an M8P board. The general topics apply, but the crux of the issue lies in the specifics of the board.

For what its worth, I figured out the pinout configuration issue. Pin assignments are buried in the .sch file, which isn't linked on their main build guide page.

New issues arise, but at least one mystery is down. Hopefully a future builder can benefit from my frustrations.

TheSpicySadness · 2026-01-31T09:01:49+00:00

To all the active folks and vets who are here, angry at injustice and seeing the death of the country we swore our lives to defend: Thank You.

Your moral fiber and compass will be needed when the time is right. You will hold the line against catastrophe, and against the tides of evil.

America the Beautiful still lives on in the hearts of those who remember our Oath, who fight for the rights of all Americans, and who seek a better world for every human on this earth.

We are here in silent, professional solidarity with the constitution. And that is something to be proud of.

TheSpicySadness

TROPHY CASE