Caveats: 1:I'm not a 3d printer user, but I may become one after reading this thread: Thanks (I think<grin>)
2:I have very little experience with Openscad. Serve the required grains of salt with the following as required Gene Heskett wrote: >1; Which is a measure of the OD of the rendered pulley, those areas of >the preview gfx are blank, although the scale marks are there, they are >drawn behind the sprocket image. so one could get a very rough idea of >the total radius of the finished gear in mm. Am I missing a font, or is >this a more serious concern that will need me to make the gear before I >can determine how it fits? Melted plastic contracts as it cools, so getting something on size is an iterative process Print, measure, calculate percentage shrinkage and reprint that percentage oversize. I understand that most slicer software includes an easy way of doing this (at least I hope so). Rinse and repeat to get something that meets tolerances. I don't know the answer to the openscad rendering question, but don't you have the parameter values for everything drawn? >2; This motor runs uncomfortably hot, and I've not found anything to >indicate the controller goes into a low current mode at balance, I left >it running at about 1500 revs for half an hour and cannot lay a hand on >it to pick it up, and an extended stop didn't seem to cool it any, and >since that heat will telegraph up the motors 8mm shaft to the PLA, is >this going to be a life of the sprocket limiting factor because the PLA >will soften and eventually cold flow to a loose and likely out of >concentricity warpage? That's something that you can figure out now, melt temperature and (I just found out from the link below) glass transition temperature 111 to 145F. Can you squeeze a metallic hub in? Or maybe an aluminum heat sink on the shaft between the motor and where the gear will sit? https://www.creativemechanisms.com/blog/learn-about-polylactic-acid-pla-prototypes >3; I have the pi3b I took off the Sheldon, and another of those 5v5a >supplies, and I've downloaded the octo-pi image that includes that >slicer. So that I think solves the slic3r problem of having to compose >a working multi-variable config for slic3r. Unless someone has a slic3r >config to drive an Ender that they can share. Nope, but a google search found this-any good? https://www.youtube.com/watch?v=3yIebnVjADM I hope some of that helps? Martin _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
