Thelaunster wrote: ↑
15 Feb 2020, 23:18
I too have been experiencing issues with my B2X300 frying multiple extruder stepper drives on me.
I first stepper driver died mid-print. The extruder would not turn during manual extrusion mode. The TMC2130 driver had a clear burn mark where it was soldered to the chip. After sending a picture to customer support, they deemed it faulty and sent out a replacement.
I also bought a few spares online. Troubleshooting this problem I have fried 3 more. All exhibited small black burn speck from where they failed.
I triple checked all my wiring, made sure the power was grounded, carefully installed all new drivers, and unplugged the USB tether to my PC.
After running the diagnostic test, it has been smooth sailing.
My best guess for my situation is that the USB cable may have been getting power from my PC as it power cycled on/off or wake/sleep. This may not entirely apply to you, but it was giving me a headache for months. Printing gcode files off the SD card has proven to be much more reliable for me.
Hope this helps!
This is interesting, my printer has been burning extruder stepper drivers like crazy (except I haven’t been using it tethered to my computer so the only source of power is the power supply & while assembling it I made to use decent amounts of dielectric grease on the main power connectors to ensure there isn’t any arching). Even went as far as upgrading the fan just in case the drivers were getting hot.
I’ve been trying to get in touch with BVC about this for a bit with no luck...
1st stepper burned right after loading E2 for the first time (interestingly enough most of the drivers can complete filament load fine then die shortly after starting the first print).
2nd stepper randomly died on E1. The extruded I had been using since the get. I believe it had been after changing filaments.
All future stepper drivers are Watterotts (tried bigtreetech tmc2130 in SPI mode with no luck):
3rd stepper I believe was a similar situation as to the first two.
It’s at this point where things are working generally OK, but I’m noticing occasional grinding from the extruders. A forum post suggest BMGs as good upgrade & one of the easiest to perform. I install BMGs (while still using the oilers), Capricorn bowdens - cut to same length, & add a buildtak sheet. I had already swapped the Heatsink fan & managed to fit some silicone socks.
Steppers 3-6: edited FW to change steps/mm to 415 (to be safe I changed the values for pre production and production b2x300 printers both to 415 using the BVC file that marlin reads for those values.
After doing so the display still showed the extruders as set for 101.5 (or whatever it is) so I changed it manually on the device as well - lot of turning....
E1 loads up filament just fine, correct amount of filament is extruded during loading (meaning about the same as before the BMG mod). Just to play around with it I try extruding a fair amount extra filament with one of the steppers - all fine.
I also tried manual loading with some of the drivers - fine as well.
Load up the g code for the BVC filament support wheel shaft.
Primer line is put down totally fine, same extrusion as normal. (Interestingly enough every time the head moves over to the center there is a bit of scratching that I believe is coming from the head and the buildtak - haven’t been able to test much, but assuming it’s me setting nozzle height for bare glass which is too low for buildtak).
First couple circles are extruded fine, pretty much perfectly with little to no gap between the lines.
After this extruded ALWAYS stops working - some filament comes out as the hotend is hot and there is some pressure on it.
I thought maybe the tighter bowdens could be a factor, but so much filament has gone through them by now that they are well lubed & using a thermal camera the driver temps are quite low 35-40 C at their hottest points.
Going to try emailing... again....
Have another 4 wotterott drivers coming today, but I don’t want to put them on for the machine to eat them right away... that’s over $100 I’ve spent on stepper drivers AND I HAVENT EVEN FINISHED PRINTING THE FILAMENT SUPPORT YET!!!!