I’m also making lots of mistakes with UBL. It’s my own fault, and I don’t really want to add 10 minutes to each print time by using bilinear to measure it each time. It would help if I had more than a half hour every other day to work on it.
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I’m with you on this. I was just playing with UBL today and getting a little frustrated with the results. I decided the problem was actually two things not related to UBL: 1) the BLTouch mount was being torqued every so slightly as the X axis moved due to the wires running from the head and 2) the touch Z offset had also drifted by 0.15mm over time.
If I’m not messing with the printers every day, it’s easy to lose track of all the non-obvious variables at play.
I set linear advance to between 0.35 and 0.5 depending on the part. But usually it’s at 0.4
Related to a comment above about adhesion … I ended up sanding the plastic film on the WhamBam bed and this helped.
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Today, I had what I think was a filament partial jam. It was manifesting as 50% extrusion for a bit and then 150% extrusion. So I took out the ptfe tube and while I was yanking on stuff my bltouch mount broke and the thermistor pulled out. But the jam seems cleared. I am going to print a new bltouch with some cross braces and I will check my thermistor then. I am considering getting a genuine V6 heater block, heater and thermistor. I thought that was a worthwhile upgrade on my other printer.
The 0.35-0.5 range is useful. I’ve had it at 0.7 for the last few weeks and it has been ok, but it really affects speed. I’m not sure if it is a property of one of the associated accelerations or what. But I tried turning it to 0, and the thing just flew.
you can crank up the acceleration quite a bit. these are my conservative settings:
[19:46:19] [1:8,0:0] ==> M503
[19:46:19] [1:8,0:0] <-- echo: G21 ; Units in mm (mm)
[19:46:19] [1:8,0:0] echo:Filament settings: Disabled
[19:46:19] [1:8,0:0] echo: M200 D1.75
[19:46:19] [1:8,0:0] echo: M200 D0
[19:46:19] [1:8,0:0] echo:Steps per unit:
[19:46:19] [1:8,0:0] echo: M92 X80.00 Y80.00 Z400.00 E100.00
[19:46:19] [1:8,0:0] echo:Maximum feedrates (units/s):
[19:46:19] [1:8,0:0] echo: M203 X200.00 Y200.00 Z10.00 E25.00
[19:46:19] [1:8,0:0] echo:Maximum Acceleration (units/s2):
[19:46:19] [1:8,0:0] echo: M201 X3000.00 Y3000.00 Z100.00 E20000.00
[19:46:19] [1:8,0:0] echo:Acceleration (units/s2): P R T
[19:46:19] [1:8,0:0] echo: M204 P3000.00 R3000.00 T3000.00
[19:46:19] [1:8,0:0] echo:Advanced: B S T J
[19:46:19] [1:8,0:0] echo: M205 B20000.00 S0.00 T0.00 J0.01
[19:46:19] [1:8,0:0] echo:Home offset:
[19:46:19] [1:8,0:0] echo: M206 X0.00 Y0.00 Z0.00
[19:46:19] [1:8,0:0] echo:Unified Bed Leveling:
[19:46:19] [1:8,0:0] echo: M420 S1 Z0.00
[19:46:19] [1:8,0:0] Unified Bed Leveling System v1.01 active
[19:46:19] [1:8,0:0] Active Mesh Slot: 0
[19:46:19] [1:8,0:0] EEPROM can hold 32 meshes.
[19:46:19] [1:8,0:0] echo:PID settings:
[19:46:19] [1:8,0:0] echo: M301 P30.65 I3.53 D66.45
[19:46:19] [1:8,0:0] echo:Z-Probe Offset (mm):
[19:46:19] [1:8,0:0] echo: M851 X-30.00 Y0.00 Z-3.25
[19:46:19] [1:8,0:0] echo:Stepper driver current:
[19:46:19] [1:8,0:0] echo: M906 X760 Y760 Z800
[19:46:19] [1:8,0:0] echo: M906 T0 E1100
[19:46:19] [1:8,0:0] echo:Hybrid Threshold:
[19:46:19] [1:8,0:0] echo: M913 X201 Y201 Z10
[19:46:19] [1:8,0:0] echo: M913 T0 E0
[19:46:19] [1:8,0:0] echo:StallGuard threshold:
[19:46:19] [1:8,0:0] echo: M914 X255 Y255
[19:46:19] [1:8,0:0] echo:Driver stepping mode:
[19:46:19] [1:8,0:0] echo: M569 S1 X Y Z
[19:46:19] [1:8,0:0] echo:Linear Advance:
[19:46:19] [1:8,0:0] echo: M900 K0.40
I also ended up getting the genuine V6s. One thing that’s easy to overlook but critical: check that your set screw on the filament drive gear is always tight (and on the flat). It can work itself loose and give you no end of trouble that’s really hard to diagnose. For that matter, make sure all the screws on the drive head are tight. This is far more important on bowden drives than direct drives.
Pulley grub screws! It is a common (based on the truth) joke around here to check the grub screws. I will check them again next time I get half an hour.
I wonder if part of my problem is that I had the LA too high, which was slowing down my prints, and when I cranked up the speed I didn’t get much benefit. Now they are too high. I was using 9000 for my xy accelerations and my P accel.
Is your Z offset really -3.25 or is that just a good default? That seems very large. Mine is -0.5 or - 0.6.
The BLTouch, when extended, is 3mm below the nozzle. Unless I have that backwards and it’s 3mm above when retracted. Not with the printer right now.
I could have sworn there was a spec that said the bottom of the bltouch case needed to be exactly 8.4mm below the nozzle, and so I adjusted mine that way. It trips just before the nozzle, which is fine, as long as the nozzle is warm. If it has a blob of cold plastic, it can cause problems. It won’t ever catch the BL touch on a curled print corner though, that’s for sure!
I had a wiring issue with the hotend fan. I think that was causing my jam. That seems to be fixed, and the thermistor is holding for now. I installed the stronger bl touch mount. I have the linear advance back down at 0.4 and that’s working well enough. Grub screw was tight.
I think I’m getting the hang of this.
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My bltouch is 3.77mm.
I printed a big handle today. I had a great first layer:
There was a little trouble with under extrusion on the close side. The overhang over the close hole also curled up and the part shifted. I am not sure if it was the steppers, but I think it was actually the magnetic sheet shifting.
The part is definitely useable. It took 5.5 hrs to print, which I think is going to be right about midrange for this printer. The top and bottom finish are good. I think the biggest barrier to more speed is the retraction settings. This must include the linear advance settings. It printed the front edge really quick, and the finish in XY is good. But when it does infill, it sort of stops and starts. I haven’t bought the geniune e3d v6 hotend, and I am considering instead buying a hemera for it. I am also still thinking about buying a new bed, but I still really want to like this one.
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Warping starts later, if at all. But of course, such a foundation is essential.
FLP for sure
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@jeffeb3 @vicious1: Can one of you share a link? I’ve been looking around for it but haven’t had any luck.
I will see if I can find one.
Such serendipity though. I was literally coming here to post a pic of what that vase had become:
It’s been sitting in ny desk so I printed a cover for it and it now holds some spare tools that were on my desk. And some pencils.
It’s good plastic after bad, but I think it will make me happy to see it on my desk.
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I’m not sure anyone is interested in the lid, since it fits my stuff. But I can push that somewhere too.
Ha, ha. Awesome, thanks. I’m really impressed with your printer! I’d be interested in your lid part as well.
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Here is the onshape file (so you can mess with the dimensions and make your own holes):
https://cad.onshape.com/documents/8aca1e0d405481e9a8558ad6
And here is the stl I used:
lid.zip (403.0 KB)
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I go so inspired by this thread so I have to build one too. I’ve got an Ender 5 with extras and I don’t like it very much. I will use your (and Steve’s) builds as a reference and make some tweaks here and there. I have a SKR e3 2.0 and thought of a SKR 1.4 for this build but I stumbled on a Duet2 wifi. I’ve never used Duet/RepRap before and only heard good things about it, so it’ll be fun trying that out on this build.
In fact, I ordered most everything for this build this morning, so now I just have to wait for the parts to show up. Temped to make the cube and plate a little larger as I bought 500mm extruders but I may stick with the 450mm measurements. And go with SSR instead of internal voltage.
Jeff (or anyone else that built it), do you have any video on your printer when it’s in action?
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I have a few, but none recently. My part cooling fan came unhooked and I got a nasty clog. While trying to clear it, I ruined part of the extruder, so it is out of commission for a few days.
Stewart is very active in the gridspace forums and there is a budding couple of folks working on gridbots there.
Shit happens. Thanks for the tip on Gridspace forums. Didn’t know about it before.
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