On Thursday 12 December 2013 19:27:55 Leonardo Marsaglia did opine: > Greg and Gene (this is to avoid quoting a lot of text because you were > talking about the same thing) > > I saw what the common process to make pieces out of a Delrin and Acetal > is to mold them with heat. I'm not familiar with this kind of material > but nylon 6 for example it's not complicated at all the thread and > machine on the lathe. Are Delrin and Acetal all that different? I mean, > is not possible to thread them in the normal way? > > Thank you! > > > 2013/12/12 Leonardo Marsaglia <leonardomarsagli...@gmail.com> > > > 2013/12/11 Dave Cole <linuxcncro...@gmail.com> > > > >> It sounds like you are greatly simplifying the machine. An MG set > >> (motor generator set) is a very old technology to create DC power. > >> That was probably obsolete when it was installed. > >> > >> Yes indeed, I really don't understand why a 70's machine would use an > > > > motor generator to feed a DC motor. > > > >> When the Parker Servo malfunctioned it was very obvious. It had a > >> > >> digital display on the front to show status and it would go blank > >> when the induction power was applied to the heating coils. It was > >> quite literally "lights out". I thought that I had lost power to > >> the drive due a wiring error or blow fuse. > > > > I hope I don't have that kind of trouble with the VFD. Sometimes I had > > noise moving my steppers on another machine when the MIG welder pulsed > > in high frequency. I don't know how is it going to be with the heater > > but may be using line filters could help. > > > > > > > > -- > > *Leonardo Marsaglia*.
I expect you can, but the heat method, where the screw is clean & has a coat of mineral oil on it prevent the acetal/delrin from sticking to a dry surface, gives you a thread that is about 40x more precise a fit _to_ _that_ _bolt_ than a tap ever could, because the taps and dies are sized for some dirt clearance etc. I'd make a SWAG and say that using a tap would be a very quick way to guarantee 10 thou or more of backlash. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> <Mercury> emacs sucks, literally, not a insult, just a comment that its large enough to have a noticeable gravitational pull... A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
