Extruder skipping, extruder motor overheating?
My extruder (LGX Lite) recently started skipping. This started happening overnight: one day it was fine, and the next it wasn't.
It can currently extrude at 8mm/s (not mm^3/s), but not beyond, or it skips
What I've tried so far:
1) Changed the nozzle (just in case 😅)
2) Tried several other filaments, with various temperatures as well
3) Cleaned the hotend, some filament was a bit stuck, but removing it didn't change anything
4) Checked the PTFE tubing, no issue seen, replaced anyway
5) Tried running the extruder without anything else, and pulling on the filament in the opposite direction, and the extruder is still able to pull the filament, no issues
6) Checked the gears, they look brand new
7) Visually checked the wiring, which looks fine?
The motor is very hot to the touch, even when idling, which makes me suspect that it may be the issue, but I'm not entirely sure. I'm fine with swapping parts, I'd just like to avoid doing so if it's not necessary.
Please help :upsidedowncry:
4 Replies
Check that you don't have a buildup in the extruder causing a jam. Check your filament path. No resistance to the filament coming in. If there's a kink in the line it has to pull through that.
I've checked inside the extruder, nothing is blocking. I've actually removed the input line for my tests to rule that out altogether
extruding w/o the nozzle works fine, but that makes sense since there is no resistance on the other side
If you have another motor lying around I would try swapping it, as it should not get hot when idling unless you have set a very high hold current.
you need firstly know your motor datasheet, if it is really overheated, magnets will die.
https://www.bondtech.se/downloads/TDS/Bondtech-13013A-classH-36H020H-1004A-001.pdf
According to datasheet it must not. (H class)
After that, you need to correctly configure current for the motor, depends on datasheet and set correct Rsense for drivers if they are configured by UART.
(if not you must check Rsense physicaly on the driver and calculate current)
About extruder itself, it must be capable of lifting 1kg spool from the floor, literaly. You can disconnect extruder from hot end and just check if it has enough torque.
if it is fine, you have problem in some different place.
About 8 mm/s - that means nothing because with 1.75 filaments there is a flow of 8 * (1.75/2)^2 *3.14 = 19 mm/s which is large enough for volcano V6.