On Sunday 27 March 2016 16:35:22 Gene Heskett wrote: > Greetings; > > I just did some playing, tapping air with a 4mmx.7 tap, to see just > how fast I could run it without errors as I raised the spindle revs. > > With some diddling of accels amd such, I just tapped a hole 175mm > deep, at 1mm pecks with a 2 second pause at the top to allow the tap > to be blown clean and annointed with a drop of buttercutt, or whatever > you fav tap lube might be, at 1300 rpm. That puts my Z axis at about > 80% of its top speed with that fine a tap, .7mm pitch, which I think > is amazing all by itself. > > The G0704 seriously needs an air or gas spring counterweight scheme in > order to equalize its max up speed with its max down speed as its > about a 2/1 diff since the screw has to lift the 30+ lb head. So if to > match the xy speeds, that nema 34 needs to grow some real nema 34 > torque and that likely will need a higher voltage supply (60 now) to > get speeds like the XY have now. > > This motor crawls at its top speed, might be turning 400 rpms, and > fleabay can supply a stronger motor, but where can i source a psu that > would turn it at 1000 rpms under load? Those for steppers seem to top > out at 60 volts, but that qould probably need at least 100 volts at 7 > to 10 amps to get real speed, say 75 IPM out of it. > > So with the current Z drive, 4-5 hundred revs is about the limit on > bigger taps. I ran a 10mm tap at 200, ditto a 7/16 USS and that > worked, but even though I had the backgears in the head in low, it put > a serious strain on that 1HP motor. > > I thought I had my overtravel tally working like it does on the lathe, > but its acting as if it has no input, so I need to go play with > that .hal file again as apparently I did not copy/paste /all/ the > lathes stuff into it yet. At 1300 revs, I am guessing the overtravel > is close to two full turns. > > With that huge 5" 4 jaw on the lathe for mass that has to be turned > around, its over 3.5 full turns at 300 revs, a huge difference. > > My back is screaming, worked too hard trying to put our basement back > together far enough to be able to do some laundry, but didn't get it > done as I thought this might be a good time to fix the burned off > connection to one of the heater coils in the pan on the rear of the > drum. But before I pull the drum, I'll drop the card for a new one as > this one is 35 yo or more. It doesn't owe me a thing. Neither does > the top loading, never quite rinses all the soap out even with a 2nd > cycle with just water, Maytag of similar vintage so 2 new machines may > be on a truck by Tuesday latest. > > I am looking at the pricy SamSung offerings as being a cut above the > rest, anybody else have any other good recommendations?
No comments on washer/dryers? Gee... And I have another puzzle: My next door neighbor came down to see what I was doing, so I demoed that bit of code for him, but that didn't demo the vacuum cleaner controls I had added since he last saw it run. So I added an M8 after the M3 that started the spindle, and an M9 after the M2 at the end of it. And now it will not execute the program without a joint 2 following error at 500 RPM, let alone 1300 rpm's. Take those 2 commands back out, works a treat. The start spindle and flood (m8) is outside the while-endwhile that runs the loop so I haven't a clue whats going on. Does anyone have a suggestion other than putting the M9 in front of the final M2?, but heck, the M2 SHOULD stop it all so the M9 is probably superfluous anyway. Thanks all. And I hope you all that celebrate Easter, enjoyed the day _and_ its meaning. 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) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
