On Friday 03 February 2017 13:53:09 Chris Morley wrote: > No I wrote a python HAL program that used the serial port. I used a > converter to convert from rs232 to 485.I referenced Mitsubishi papers > for the protocol. I can add it to linuxcnc if anyone is interested. > > Chris M
Please do Chris. I went out on a limb and bought a 5 pack of usb<->rs-485 gismo's thinking I could use them to talk to the VFD I have on the Sheldon. Sure. Unforch, its a fake VFD, and despite a full, every bolt teardown, there is not a rs-485 port anyplace on its pcb's. So I have one of these things hanging on a 10 foot USB cable plugged into the Dell running the G0704, and wondering what to do with it, although it does make a decent night light. :) However, given the limitations of programming it from the front panel, it runs from a 10 volt signal from a SpinX1 just fine. I'm running the 7i90's PWMGEN in PDM mode, smooth as silk with the only noticeable lag being the startup lag of about 1.5 seconds because the current safety stop, its too slow, is only about 1/2 Hz below the first step of 100 revs, no back gear and 1st gear in the belts, stop is maybe .75 seconds from 200 hundred revs. I haven't measured the m3/m4/m3 vs any real speed above 100 revs yet. I don't want to unscrew that 7.75" chuck. :( But I have a clamp for that about half made when I blew up the 7i90, so thats the rest of the first swarf project/test. I have it rewired except for the stuff that plugs into the 7i90 as of about 20 minutes ago. I'll have to finish the 7i90 i/o wiring before I can power any of the motors as I put a couple 40 Amp SSR's, to be controlled by LCNC's motion.motion-enable signal, in series with everything but the 5 volts for the pi & 7i90. I put a 20 amp Brick Wall filter at the line input of the VFD, and a big ferrite clamp-on at the output of it, and ANYthing carrying switch mode power is now either in well shielded and single bolt grounded cable, or in well gripped for shielding continuity, conduit or BX. Next is go kill the main breaker for it in the service, mount the new 7i90, and see if I can control the SSR's. But its getting on toward nose bag time, so I better go see what the better half wants for dinner. :) [...] Thanks Chris M. 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> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
