Re: new A20M couple of problems
Posted: Mon Jan 13, 2020 10:30 am
Hi Jarda
I used the second thingverse version that you suggested above (by KayIOA). I used the one labeled Geeetech_lever_FDM. I tried the one labeled "..._smallerTolerances", too; but I had less luck with that one.
I printed in PLA (.4mm nozzle, .2mm layer height). If I was printing another one, I'd try PETG, which KayIOA seems to recommend. But I always find PETG is more flexible, and I'm not sure that's a good thing in this case. Also, I get a lot of warping with it, and that also seems problematic when dimensional accuracy is so critical.
Initially I made a mistake in the disassembly; there are a few metal collets that you might or might not want to remove, but eventually I realized the unmodified Geeetech_lever_FDM.stl from KayIOA was what I wanted -- if I handled those fussy little metal collets correctly. I also had to do a little scraping to free up the "opposing wheel" or whatever it's called that presses the filament into the toothed gear. I had a few prints that caused that wheel to stick and wouldn't work at all, but the last one I did was marginal, and with a little scraping out, it worked just fine.
I also had to be careful how much to tighten down the cover -- tightening down all the way will lock up the extruder. So my printed lever is clearly marginal, from a technical point of view.
But I also think that a part shipped in the product cracks in the first 30 days from normal use, Geeetech should replace it (the part, not the whole printer in this case) -- and from my PMs with William, that's what I fully expect will happen. Without arguing over Geeetech's decision to ship the current plastic version of the extruder; I'd also like to be able to buy an all metal extruder kit; much like Creality sells for their Ender 3 (and other printers). That one is about $12 on Amazon, so, why not give a similar option for the A20M? And, of course, there's what I think you called "Geeetech's zero cost option" to add STL and/or gtech files so we can print our own as needed without the kind of search and hack that we've run into.
But at least my printer is working for now; thanks for your recommendations.
I used the second thingverse version that you suggested above (by KayIOA). I used the one labeled Geeetech_lever_FDM. I tried the one labeled "..._smallerTolerances", too; but I had less luck with that one.
I printed in PLA (.4mm nozzle, .2mm layer height). If I was printing another one, I'd try PETG, which KayIOA seems to recommend. But I always find PETG is more flexible, and I'm not sure that's a good thing in this case. Also, I get a lot of warping with it, and that also seems problematic when dimensional accuracy is so critical.
Initially I made a mistake in the disassembly; there are a few metal collets that you might or might not want to remove, but eventually I realized the unmodified Geeetech_lever_FDM.stl from KayIOA was what I wanted -- if I handled those fussy little metal collets correctly. I also had to do a little scraping to free up the "opposing wheel" or whatever it's called that presses the filament into the toothed gear. I had a few prints that caused that wheel to stick and wouldn't work at all, but the last one I did was marginal, and with a little scraping out, it worked just fine.
I also had to be careful how much to tighten down the cover -- tightening down all the way will lock up the extruder. So my printed lever is clearly marginal, from a technical point of view.
But I also think that a part shipped in the product cracks in the first 30 days from normal use, Geeetech should replace it (the part, not the whole printer in this case) -- and from my PMs with William, that's what I fully expect will happen. Without arguing over Geeetech's decision to ship the current plastic version of the extruder; I'd also like to be able to buy an all metal extruder kit; much like Creality sells for their Ender 3 (and other printers). That one is about $12 on Amazon, so, why not give a similar option for the A20M? And, of course, there's what I think you called "Geeetech's zero cost option" to add STL and/or gtech files so we can print our own as needed without the kind of search and hack that we've run into.
But at least my printer is working for now; thanks for your recommendations.