Does anyone know what tells the feeder to stop feeding when the filament reaches the printhead, when you’re loading a fresh filament?
Currently, mine is continuing to try feeding filament once it reaches the head, & I can’t figure out why.
As best I can figure the “load filament” macro runs the pusher until the runout sensor in the tool head switches true.
If I’m right and the feed tube breaks or comes out of a fitting it COULD push the entire roll onto the floor. OR if the switch doesn’t trigger run until it grinds thru the filament and keep on running.
So there’s a runout sensor in the printhead too?
No, there is not a sensor in the toolhead. The toolhead is the same as the Zero.
Maybe this can help you out.
Cheers. I’ve had a read through that. Nothing mentioned in that article seems to be an issue. The feeder works fine in general. It’s merely when loading, it’s as if it’s trying to feed filament for several seconds more than it needs to. Currently I depress the gear lever on the feeder once the filament reaches the extruder, until it stops feeding. Be nice if I could find out how to get it behaving again though.
Still not figured out the issue as yet, but I haved used it as an excuse to print & fit this enclosure file I downloaded, today. Figured that’d allow me to check & monitor all the mechanism in operation, & with the added benefit of making it easy to vacuum out any filament dust/shreds which may accumulate in there.
Found out why it’s trying to continue feeding when it reaches the printhead. With me slowing the feeder down in the config, it wasn’t tripping whichever sensor detects stoppage. I’ve upped the speed to ⅔ of the default speed, & that appears to be enough to get it behaving as it ought.
Velocity seems to be the setting which can quieten the buffer without affecting its ability to feed fresh filament. I put accel back to its default setting of 5000, & the filament fed fine from that point on. I now have velocity set to 30, rather than its default of 150. Doesn’t seem to have any adverse effect with regard to buffering/feeding, but it does make a notable difference to the noise level.
Have you run a “max volumetric flow” test? If the buffer keeps up you’re golden.
If It can’t keep up it’s no big deal. Just remember if you speed up or switch to a bigger nozzle you need to speed up the buffer.
I haven’t. I just tend to monitor by eye & go from there.
I do run lower speed settings than standard, so others may need to set it slightly higher than I.
On a complete tangent, another very minor thing I found worth doing was applying some tape, (heatproof fabric tape), to the magnetic door catches. Softens the contact when one closes the doors. An inconsequential point, as such, but hearing that clang when you’re closing a glass door this large always makes on a tad nervous.
I’ve ordered the combo set from this listing for the Max.
Not because I have any issues with the feeder. Simply in order to enable auto feeding/continuation of upto 4 spools, for larger prints.
Fitted these, the other day.
Ran one successful test print.
Some 18V battery holders.
Suffered an extruder jam/clog when testing for filament runout & second filament takeover, & ended up cracking the heater on the heater on the hotend whilst sorting that, so awaiting a replacement hotend before further testing.
The mounting plate is simply a piece of plywood. Front mounting holes match/use the original feeder fixing points. I have drilled through the side panel to allow a third fixing screw at the rear of that mounting plate.
The little grey units attached to the side panel below the feeders are Fystec auto filament cutters, for if there’s a spool jam, tangle etc. They may or may not stay.
FYSETC 3d Printer Filament Cutter.