Topics created by oryhara

@dc42 Yes. My idea is having a solid strain relief anchor point on top of the direct extruder. As I am routing 23 wires to the hotend (heaters, fans, extruder, smarteffector and accelerometer) I am using a 2x12p Microfit and from there routing the wires in bundles to the molex KK and JST. I expect those connectors downstream of the Microfit will not suffer any stress because all is taken by the Microfit. I agree that the Microfit is not an easy connector to deal with. I bought a cheap extractor from aliexpress that seems to do the work

So I ended up getting a Amazon basic ceramic space heater and hooked it up to a ssr this thing works great

@oryhara said in Duet maestro cooling in a passive heated chamber:

My question is this: will 45C air temp be a problem for the duet maestro?

That depends on what motor currents you are using. With a higher ambient temperature, the drivers will obviously get hotter at a given current setting.

It's more usual to put the electronics outside the heated chamber.

Free as in speech AND as in beer? Damn, I wish I lived in Texas!

it's an anycubic predator. they're optical endstops. and the probe is a smart effector.

I'll have to PID tune the heater. thanks for the heads up.

@Phaedrux Not in the predator frame. It's got a triangular pancake space up top. That's where the controller lives. The cover plate is off in that picture, but the height is limited to the space between the outsides of those two 20mm T-slot extrusions visible at the edges of the picture.

Angling the fan downward has fixed the issue. I see no more temp warnings.

ah thank you very much. I don't know how I missed that before.

@oryhara

In case anyone else encounters this issue in the future, I thought I'd add a recent finding:

I've been having this issue frequently near a BMG extruder outlet. I'd cut the tube a couple of times to give it fresh material to clamp onto, which did help a bit, but the issue was slowly getting worse.

I had a couple of the E3D Bowden fittings spares laying around and thought I'd try replacing the inner fitting. I cut 1/4 of it off to get it out, but was actually fairly surprised when I got it out.

Bowden Fitting Covered with PTFE Residue

The original tube (also from Anycubic) had left some residue on the Bowden clip - you can see it in white. This was essentially coating the clip in PTFE as well, which substantially reduces the friction holding the tube in place (PTFE on PTFE has the nearly the lowest friction coefficient possible). I switched the tube to some leftover Capricorn tubing and changed out the fitting - I've noticed the difference immediately despite the smaller outer diameter of the Capricorn.

TLDR?
Public Service Announcement: Throw away your Anycubic PTFE tubing and replace the Bowden insert if you're having this problem.