Ah. Thanks. I drilled it out and helicoiled it tonight, looks good, but who knows what effect I have had on the heat transfer portion. Fits nice and tight though. Will test it out this weekend and hope for the best.
If I didn't have about 30 rolls of unopened 3mm filament I'd just switch to 1.75 
It looks like one is a 3mm variant while the other is a 1.75
Yep, that's sadly the problem. Didn't realize the 3mm version is thinner than the 1.75mm one. Really can't see why it'd be like that, but it's true. Looks like 3mm is a M6 thread and 1.75mm is a M7 thread.
I'm going to try boring out the heatsink and putting in 6mm helicoils to see how that works, as there's no other option for those of us wanting to use 3mm filament.
Other thing I though of would be boring out a 1.75mm heatbreak, or cutting off the top of a groovemount and using a die to put on M12 threads.
I wanted to update this to say that the diameter of the volcano heatsink hole and the diameter of the one provided in the PCB kit are NOT the same. My volcano heat break does NOT work (heatbreak is it's too thin). I'd say it's at least 1-2mm off.
Yep, still doing it. Peak valley peak valley, alternates every other sample, even with 20mm spacing.
Rerunning that corner now: M557
Grid: X-150.0:0.0, Y-150.0:0.0, radius 150.0, spacing 10.0, 256 points
And exactly the same thing. High along rows of X, then low along a row of X, then high, etc.
Is it possible there's something mechanically causing it to be low when it's moving one way and high when it's moving the other? That's the only thing I can think of.
By the way, here's what a large square looks like (first layer) WITHOUT mesh leveling - prints pretty good, I'm just trying to get rid of the lumps. Definitely no peak/valley surface.
It's aluminum plate with black spraypainted PEI glued on top with the 3M tape. Let me run it again with 20mm spacing and see what happens…
It's one of your mini IR sensor boards. The probe works well for autoleveling - haven't had any issues there. Also, the three peaks in the graph really are there (there's three bumps in the surface of the print bed). But the alternating portion in that are isn't real, at least as far as I can feel and see.
Hello,
I'm having a really hard time getting the mesh leveling to do something reasonable on my printer. I get a very odd alternating high/low pattern in the Y axis as it probes. Here's the picture:
And my heightmap file:
Any thoughts on what might be causing this odd behavior?
Found a bug with the DWC - when I enter in my webcam URL for the "Webcam Surveillance" preview, only every other "refresh" displays an image. For example, if I say update every 10 seconds, for 10 seconds a picture is displayed, then for ten seconds a broken image is displayed, then 10 seconds of a new correct image, then 10 seconds of a broken image…. etc. By broken image I mean an invalid JPEG, the browser won't display it.
M92 X800 Y800 Z800 ; Set axis steps/mm
Seems really high. Shouldn't it be more like 160 for your setup?
DC42, on my delta I don't use any XY offset for your IR probe when running G30 autocalibration and it works fine. When I run G29 grid levelling after, should I have entered an XY offset via G31 first or not? My probe is offset about -40mm in the Y direction.