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BTT S42B V2.0 - will not enter calibration #43
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was dip 4 off not required for enabling writing the cal data to the flash area? not sure, how it is for v2. |
I've tried both on and off and regardless it won't enter a calibration state. It does nothing when selecting to calibrate. |
i had the same problem and remember reading that for version 2 you need to have dip 1 and 2 on and for another version was 3 and 4. so i just turned 4 off right now and turned on 1 and 2 and it worked. it went into calibration mode. But whats weird is the writting said to do that after you calibrate. so try that. it worked for me. so 3 and 4 down and 1 and 2 up. |
MOTHER OF GOD THIS IS THE ANSWER! |
Either the Dip switch is mounted backwards. 1 seems to be 4 and 4 seems to be 1. Dip 1 on 234 off its calibrating Now. So the PDF guide in the source code says Dip 4 on 123 off, sigh but in reality its Dip1 @milicigoran thanks!! i wasted so much time compiling and flashing because seriously how could ever BTT S42B V2.0 i got be bad??? |
I found it am accident because I have 2 other ones that it's dip 4 and they work perfect but I was in here this morning looking for a solution trying to compile with vs code. Not letting me. And I've had this new one for a few days but haven't touched it because i was waiting for my linear rails to get here and make my printer in to double z with linear rails everywhere. Anyway couldn't find a solution to my problem but your post was the last one i read before going to start the hook up process and sure enough it wouldn't calibrate. But my other one side just fine. And then i remembered reading on BTT website that for sale 1.4 turbo it's pins 3 and 4 and for 1.3 i think it's pins 1 and 2. But that's to run it after you calibrate. But since I saw that you guys tried everything else i said i might as well try pins 1 and 2. And sure enough. I was like a little kid. Didn't wait for the calibration. I went straight to the computer to let you know because I know how it is to want to do something but u just can't and hope someone else figures it out. I hate that feeling. Anywayblojfg story short glad i could help. Hope it works out for you. |
@milicigoran I got them all working on my test bench ramps with Pin 1 instead of 4 for calibration and pin 2 instead of 3 for closed loop enable. Pins 3 and 4 set the microsteps. It makes no sense that a different Main board for the printer would change the dip positioning needs. I still feel like my dip and your dip switches are just installed in reverse. The documentation is also lacking sadly. The PDF included with the V2.0 source shows a board layout for their old S42A with USB port still. |
Yeah it's probably reversed because I have 2 that work normal with 4 for calibration and just b1 that's pin 1. And this one that's backwards i got on Amazon for cheaper because it was a return. And I'm betting they returned it because they couldn't get it working. They were probably trying pin 4 and when it didn't work they sent it back. Actually just now writing this i realised another variable. This one that's like yours and backwards i got with the stepper as a plug and okay package. The other ones that are dip 3 and 4 i got just the board with the oled. Did you buy the package or just the board? |
Because it could be the package is different than if you buy just the board with the screen. |
I got the Full Kit with OLED with out the stepper from BTT's amazon store. Kind of weird. Seems like they might have had a production run that was reversed. |
Just picked up two of the motors myself from Amazon and found the same thing. Would not work in closed-loop mode but after reading the posts here, I tried reversing the number order. I think the issue is documentation and not a reversed switch as the orientation mark on the PCB seems to match up with DIP position 1. |
I've just purchased 2 of these from KingPrint on amazon.ca s42b v2.0 without stepper motor.. |
I am going through the pain right now............ I find I can do the calibration but end up with a stepper that when I give it 10mm moves about 7.8, looking at your comments I am going to test this theory |
Well so far the theory is correct with the switch positions but the problem still exists, pretty average company BTT |
I I ever solve this I will share it from the rooftops bloody annoying |
@NZ-Nitro I think that has to do with the steps per revolution, the S42B uses 256 steps instead of 200. (Which is 78%) |
It's poor design, look for my post with the answer |
Follow up comment from BTT |
You could better just say it's using 256 steps per rotation instead of the usual 200 or 400. For instance on Klipper, just configure with Anyhow, I have two of your modules that don't work properly and one that works most of the time, but not always. I think you could be much more responsive on updating your documentation and help your customers. |
So guys, sorry new to all this stuff. I finally got the stepper to calibrate by setting all dip switches to of then turning #1 back on. |
Putting this here in case someone else roams the internet for answers: Basically: The hardware/firmware changed, but the wires from the S42B to the motor didn't, so you need to pop the pins out of the cable connector and rearrange them as shown in the link above (the S42B's side of the cable is easier to deal with). The classic symptom of an improperly wired cable is when the calibration process thunks along and stutters back and forth rather than doing clean steps in one direction then the other. If the tiny screen module doesn't update in real time when you move the bed you can reset it to see the new degree. As for the DIP pins: 1 & 2 are supposed to match your chosen subdivision (microsteps) via the screen module. Sadly, like I said, BTT change things up inconsistently, so some people get their DIP pins installed in reverse, so 1 is calibration, 2 is closed loop, and 3 & 4 are microstepping. Some people have issues with the magnet being too deep inside of the motor encasing, so propping the magnet up on glued non-magnetic material might help with properly tracking the magnetic field. You can see such interference visually if you have a piece of magnetic paper. |
I've got 2 brand new BTT S42B V2.0 and I can't get either one of them to calibrate. They start up to say calibration OK but when I click calibrate with Dip4 on if does nothing, the K4 button works because I can use it to change every other menu option but selecting calibrate does absolutely zero. If i remove the magnet i get the 10 red led flash that is expected and if i click calibration with out the magnet i get a red flash again. with the magnet in i get no red led so it is seeing them magnet. I just cant calibrate the damn thing.
It's not functioning in closed loop either well it is but its acting just like it does in open loop.(dip4 off dip3 on). But it is working I can move the stepper It never corrects its self, the RPM always says 0000, error always 000.00 and degrees never change from the initial value when turning on the stepper. I've gone over the documentation several times its pretty sparse. What am I missing?
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