
burdickjp
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burdickjp last won the day on June 6
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I'm having trouble finding what is causing this. I've tried in Cura 4.1 and Cura 4.2. The first layer is over extruding to line widths of over 2 mm when they should be 1.2 mm. I checked my steps per mm by extruding 100 mm of filament. It was within 2%. I corrected it. I switched to a 0.8 mm nozzle and 0.6 mm layers and it seems to be behaving, so I'm thinking there's something buggy in Cura or I'm missing a setting somewhere. UMO_3DBenchy.3mf
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F688ZZ bearing fit to shaft?
burdickjp replied to burdickjp's topic in Modifications, third party add-ons & other hardware
Best that I can tell, it seems there are a few different fits for this form factor of bearing. I'm guessing robotdigg has chosen a part with the wrong fit for this application. I checked the rods that I ordered and they're supposed to be a g6 fit, which means they're supposed to be 7.986-7.995 mm in diameter. I guess I could chuck the shafts in the lathe and polish them down just where the bearing will be fitted, like you suggest. I'd much rather find a better fit bearing and shaft combination, though. I don't think these should have much interference at all, just enough that there is no radial play in the shaft. -
I purchased F688ZZ bearings from robotdigg and 8 mm shafts from Misumi. The shafts are 7.998 mm in diameter and the F688ZZ bearings are less than 7.98 mm inside diameter. Those seem to be too tight of a press fit for the application. What have other people's experiences been? I'm looking at buying bearings from Misumi, but don't see ID tolerances anywhere to know if they're going to be a better fit or not.
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UMO+ to Marlin 1.1
burdickjp replied to nullsibnelf's topic in Modifications, third party add-ons & other hardware
I saw that you changed your git repo name to something about an E3D lite6. Are you using a 5V fan for the hot end fan on an E3D hotend?