My voron legacy cannot print because the ptfe coupler goes flying as if it was never on
#M4 PTFE coupler Flies off when pushing fillament
flint scroll
cosmic stone
Hi, you mean ECAS? Or do you use one of the threaded couplers?
Can you post some photos?
flint scroll
I over exaggerated with the flying off but it’s still kinda annoying
I’m reprinting main mirrored so it might be that
cosmic stone
I’m reprinting main mirrored so it might be that
Hm there's also threaded option
https://github.com/hartk1213/MISC/tree/main/Voron Mods/Extruders/M4 Threaded
hearty kayak
@flint scroll first of all, how fast are you trying to extrude?
And once it pops out the FIRST time the part needs to be reprinted as it's worn out
I've been running m4 for a few years and had what you are seeing happen only once.
And that was a combination of my disabling klippers overfeed protection and adding a zero to my feed rate
So instead of 5mm/s I did 50
Now my v6 can't keep up with that so SOMETHING had to give.
flint scroll
10mm/s feed rate
hearty kayak
And what hotend?
hearty kayak
Material?
flint scroll
Esun PLA+
hearty kayak
So that is a flowrate of 22.698 which a revo at 220 with PLA simply cannot do
flint scroll
oh
hearty kayak
unless this is in the loading portion whcih is just even weirded
10mm/s =/= 10mm³/s
flint scroll
So that is a flowrate of 22.698 which a revo at 220 with PLA simply cannot do
I can’t lie I don’t know any of the math for flow
hearty kayak
10mm/s is moving 10mm/s of 1.7mm diameter rod into your hotend
that VOLUME of plastic has to be all metled
flint scroll
Yeah
mental zenith
I've been running m4 for a few years and had what you are seeing happen only onc...
it happened once for me, I used superglue to reattach the ECAS coupler, and then it happened again and I took it out and haven't rebuilt the M4 yet.
hearty kayak
(the volume being a cylinder 10mm tall, 1.7mm diamter) which solves as:
Volume Of Cylinder = Area of circle * Height
V = A * H
Area of a circle = π * r² = π * (1.7/2)² = π * 0.722 = 2.2698 mm²
2.2698mm² * 10mm = 22.698 mm³/second
flint scroll
Half ABS half Petg because i ran out...
hearty kayak
and how did you install the coupling first?
hearty kayak
Half ABS half Petg because i ran out...
what material is the part the coupler clips into made of?
if its PETG i'd bet that may play into it
hearty kayak
yep, thats most likely uyoutr problem
PETG is a bit softer and flexible than ABS
and especially if the motor is warm it can softer the PETG
If you cant print it in ABS i'm sure we can get you a part from our Rescue Ravens or #printed_part_thunderdome
flint scroll
yeah i can print abs, my enclosure is disassembled right now though
cosmic stone
10 mm/s feed rate to hotend yeah that may be too much
hearty kayak
Combined with a soft material in a potentially warm motor yeah that's most likely what's going to give.
flint scroll
5mm/s good?
hearty kayak
Normally two or three mm per second is a good starting point.
flint scroll
ah ok
cosmic stone
are you printing? Then it should adjust to your hotend volumetric flow rate
