On Wednesday 11 January 2017 20:34:58 Gene Heskett wrote: > On Wednesday 11 January 2017 12:18:54 Nicklas Karlsson wrote: > > Yes it is way to slow, hardware counters are cheap and work well, do > > you have them in you PI board? > > This is my first pi project,its a raspi 3b, and I am learning as I go > while I bring this machine to life. > > ATM its sitting there, with the back gear engaged, belts in lowest > gear, turning at about 1/2 an rps as the vfd is sitting at about 20.5 > HZ. More to put time on a minmax looking for some huge bursts of speed > from .5 rps, to 25k revs either way. I hope I have that fixed, and > that all I have to do with the x/z steppers when I finally bring those > up, is more of the same that seems to have been the magic twinky to > shut the vfd up. > > First time I've ever had to deal with an spi bus thats running at > 32Megabaud when the noise from the switching psu, or the driver itself > is at 32megabaud, and the noise bouncing around is at 50 to 150 > megahertz. 3 volt p-p buss, noise is faster than the buss and 6 volts > or more p-p... > > It certainly enforces the idea of a single point ground, with BIG, > Wide conductors. So far , thats working.
And two hours later its still lazing along at about a third of a turn per second, and no noise bursts have been caught by the minmax module. Thats encouraging. So tommorrow, do the same thing with each stepper driver and exercise it for odd motions. Then I can start nailing down home & limit switches one axis at a time. Then grab the taper rig out of the back of the GMC, and use its edge of the bed anchor to hold a hinge so I can close a swarf cover over the chuck to contain the swarf, make me a tool tip height gage, round up some more tools and tool holders, and put it to work. I note there are some (4 or so) 1/2" holes in the chip pan but haven't looked for suitable drainage fittings to recover coolant, which will be needed for serious work. One thing at a time though. They currently would drain into the left and right drawers in the pedestal, which would not be a GOOD THING. 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> ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today. http://sdm.link/xeonphi _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
