#BiquH2 extruder is SO SLOW after firmware update (Ender3v2)

1 messages · Page 1 of 1 (latest)

vapid dawn
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Issue

When I have my hot end heated, I use the printer UI to extrude some length of filament so that I can calibrate my e-steps. The printer successfully extrudes material, but it's incredibly slow - As in it might take a minute to push 5mm of plastic. Prior to my fixing & upgrades, that length of plastic would be pushed in just a few seconds.

Background

I recently fixed my Ender3v2 modified with a Biqu H2 direct drive extruder after it had sat for a long time after having a very bad leak and clog. I had to replace quite a bit of hardware as part of my fix. I replaced:

  • Heat block
  • Heat cartridge
  • Thermistor
  • Heat break
  • Nozzle
  • (Added) Filament runout sensor

With the update, I also updated to the latest MRISCO professional firmware (based on Marlin) with support for my CR-Touch, Linear Advance, and Input Shaping. I think that the firmware before didn't support Input Shaping.

Before the upgrade, I didn't think of writing down and saving all my printer settings (Like motor acceleration and max speeds). I was able to calibrate my e-steps by waiting a very long time for it to push 100mm of plastic to do the math - but I can't think of how my upgrades would make my extruder so slow. The X, Y, and Z motors are all moving the same as they did before.

Attempted troubleshooting

  • I dramatically increased the max speed and max acceleration settings for the extruder motor much higher - but that didn't seem to impact the speed much, if at all.
  • I tried asking the extruder to move without any filament loaded and it was also incredibly slow.
  • I have not tried using Octoprint to send commands yet, and I haven't tried sending a print file to the printer yet.
merry prairieBOT
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AI Help

It sounds like the issue may be related to the extruder calibration, especially since you've replaced several components recently. Here are a few troubleshooting steps you can try:

  1. Check Extruder Steps/mm: Since you mentioned calibrating e-steps, double-check that the steps/mm for your extruder are correctly set in the firmware. Incorrect steps/mm can lead to under-extrusion or slow extrusion rates.

  2. Check Filament Diameter: Ensure that the filament diameter setting in your slicer matches the actual diameter of the filament you are using. Using the wrong diameter can affect extrusion rates.

  3. Inspect for Clogs: Even after replacing components, there may still be a partial clog in the hot end or extruder. Make sure the filament path is clear and there are no obstructions.

  4. Check Motor Wiring: Ensure that the wiring for the extruder motor is correctly connected and there are no loose connections that could be affecting its performance.

  5. **Test with OctoP...

WARNING: This response is AI generated and may contain errors.
unkempt orbit
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Did you correctly set up the gear ratio for the new extruder? I believe that the H2 extruder uses a 7:1 gear ratio.

vapid dawn
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I'm running a firmware based on Marlin - Is that something that I set in the settings?

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I don't recall having set that when I first set up my BiquH2... I really only remember changing my e-steps.

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Which is dramatically higher than the stock Ender3 extruder (~960 steps/mm vs ~95 steps/mm)

unkempt orbit
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That is easily explained by the gear ratio. The low gear ratio makes it move slower and less steps/mm then earlier

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I thought you were running klipper

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As long as you have it set correctly now it should be fine.

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The sudden decrease in speed and distance is explained by the gear ratio, which I suppose wasn't there earlier.

vapid dawn
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Hm - I'll try to look into if that's something I set in Marlin or in the Ender 3 settings.

I had the BIQU H2 working just fine for months before the leak and clog and I just don't recall setting a gear ratio somewhere.

Maybe it'll get mentioned in an initial set up video guide

vapid dawn
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The BV3D setup video I watched didn't mention anything aside from e-step calibration

unkempt orbit
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Mhm, so the problem only started after the clog? That's weird.

merry prairieBOT
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vapid dawn