On Monday 11 November 2013 12:35:44 aaron moore did opine: > Thanks for all your help on this one. As a result I have improved > performace a bit and maybe a more powerful z stepper driver will make > it even better. Thanks again > Aaron
Gah! Can't you train that GMX Web Mailer to do quotes better? First off, its throwing away all line feeds. No one but me now knows where Andy's message ends and my reply begins. Thats not good netiquet. Worse than GoogleGroups even except they triple space everything after throwing away all the original line breaks. We don't normally "top post" as you did above, but usually reply by mixing our replies into the "conversation". As I'm doing here. > ----- Original Message ----- > From: Gene Heskett > Sent: 11/10/13 02:58 PM > To: [email protected] > Subject: Re: [Emc-users] (no subject)Rotary problems > > On Sunday 10 November 2013 09:38:22 andy pugh did opine: > As I appear > to have been ignored... > > The problem probably is linked to the > limited lookahead, but if you > only notice it when the rotary is > involved, then it may be that the > rotary acceleration is much too > low. > It is acceleration that limits how fast a particular segment is > > allowed to run, and the lowest-accel axis will dominate. > > Angular > axis acceleration numbers are relatively enormous as a > consequence of > the units. Tens of thousands of degrees/s/s I didn't go that extreme, > but I am likely too low too, I was considering that the table has no > inertia since its geared down 90 times, and was more concerned with the > added mass of the all steel couplings I had made, which probably weigh > about the same as the 425 motor's armature, and are about the same > diameter. Some day I should make a new motor mount, sized 2" shorter, > and using one of the alu flex couplings which would be ounces lighter. > I bought a pag of them on fleabay when I started on the lathe. But I > would also insert ball thrust washers for worm end play which I do not > now have. That made a large difference in how much movement power > actually got to the XY tables. Using those, hidden in the bearing hubs > on the xy tables, with factorylike 20 tpi 10mm acme screws, a stalled > spindle will break off a 1/4 solid carbide end mill, ditto if it plugs > up cutting dead soft alu. I need more spindle revs and horsepower, > about 10x more, badly. 200 watt motor, 2500 revs wide open, sucks. Its > a toy. 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) It is indeed desirable to be well descended, but > the glory belongs to our ancestors. -- Plutarch A pen in the hand of > this president is far more dangerous than 200 million guns in the hands > of law-abiding citizens. Now, because it stripped all line breaks, it has also broken any signature detection. Normally, the "\n-- \n" that WAS after the "Cheers, Gene" above is the quoting mechanisms stopper so we don't endlessly repeat signatures in a long conversation. Please try a different email agent, maybe thunbderbird? > ----------------------------------------------------------------------- > ------- November Webinars for C, C++, Fortran Developers Accelerate > application performance with scalable programming models. Explore > techniques for threading, error checking, porting, and tuning. Get the > most from the latest Intel processors and coprocessors. See abstracts > and register > http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.cl > ktrk _______________________________________________ Emc-users mailing > list [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > Re-Form Furniture > Aaron Moore > Conileigh > Skinners Bottom > Redruth > Cornwall > TR16 5DY > > Tel: 01209 890084 > Mob: 07805686188 > Email:[email protected] > Web: www.re-formfurniture.co.uk > ------------------------------------------------------------------------ > ------ November Webinars for C, C++, Fortran Developers > Accelerate application performance with scalable programming models. > Explore techniques for threading, error checking, porting, and tuning. > Get the most from the latest Intel processors and coprocessors. See > abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.cl > ktrk _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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) audiophile, n: Someone who listens to the equipment instead of the music. A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ November Webinars for C, C++, Fortran Developers Accelerate application performance with scalable programming models. Explore techniques for threading, error checking, porting, and tuning. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
