On Sunday 16 August 2020 13:51:37 Bruce Layne wrote: > On 8/16/20 1:07 PM, Gene Heskett wrote: > > the guy on y-t showing a razor blade being used in a jig, > > hopefully to get a square cut. Not having a razor blade, or the jig > > he was using, I cut it about half a mm long and took the hot block > > with it sticking out to a piece of 320 sandpaper and sanded it flat, > > reversed the tubing and sanded the other end flat. > > The extruder on my 3D printer uses a short piece of 4mm OD PTFE tubing > as the heat break between the hot end and the cold end. This part > needs to be replaced when clearing a clogged nozzle. I designed and > 3D printed a miniature miter block that guides an X-Acto knife to make > a clean perpendicular cut so I could make a pile of replacement PTFE > tubes.
Finally, SUCCESS at making it run on minimum current and heating of the motor. Seems I had the bearing carrier upside down, which placed the bearings too deep in the flexgear. And that raised the motor loading. Turned it over, which put the bearings at about the middle of the internal splines ring, ran it on half power for about 15 minutes to warm up the motor, then switched it down to minimum current, and its sitting on the kitchen counter doing about 30 output revs just to see how hot it gets in 2 or 4 hours. So all is not lost yet! And that one has the biggest carrier I made in it, the other 2 are about .5mm smaller and have more backlash because they aren't quite bottoming the splines at max engagement. Now that I know it can work at non-destructive temps, the project is back on. Time for some din-din and make more coffee, that pot has had 2 days to cool. Thanks all. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
