On Sunday 05 August 2012 18:27:24 a...@conceptmachinery.com did opine: > Hi > I ask similar question before and now more narrow one > > In EMC2 -from the disc-- already program for 3 axis --X Y Z. > Need plug in drive. > Need plug in AC servomotor. > Need tune the AC servomotor and machine ready to work. > > That is how i build my machine. > Because new release of EMC2 -- > Question: > Is there are similar part in EMC2---to X Y Z axis --for the spindle > motor? > What i am asking is that is there part in EMC2 where i can plug in > amplifier for spindle motor, spindle motor and after tune-up the spindle > motor? > The same way as plug in amplifier and motor to each of axis X Y Z. > Many spindle motor have gear box, so need a part that will send signal > to solenoid that will change gear. > > Thanks > aram > There are quite a few ways to skin that cat Aram.
My mill is a toy, an HF micro mill, with (originally) a two speed knob that ran the gear shift, which could I imagine be converted to a solenoid control, but never have. It was also equipt with a 200 watt DC motor with a speed control pot. However, all that was contained in a drawer in the side of the gearcase, so any attempt to lube the nylon gears resulted in flying grease being deposited on the electronics. So when I put the spindle under linuxcnc control, I left the shattered fuse holder and reversing switch behind and mounted that controller card in a large radio shack project box, bought a PMDX-106 card to translate the pwm signal from linuxcnc into an equivalent analog signal that could be used to replace the original speed pot. The PMDX-106 opto isolates that because the controlling pot on all of these things I have run into so far, is at the hot side of the AC power. All in the same project box powered by a 1 amp wall wart. I purchased the extra manual speed control version and am glad I did as that allows me to control it manually too, for both directions, either from linuxcnc using m3 for CW and M4 for CCW rotation of the spindle. M5 of course stops it. Or I can do it by hand from the controlling switch and pot on the edge of the PMDX-106. The OEM VS card in the micro mill is very high gain, holding the set speed within 1 or 2% until it blows the fuse. Since I don't have feedback in the mills spindle from an encoder, nor do I use the PID module, there is not a way to tell emc the motor is about to stall or blow a fuse. So on the mill, I have a small bridge in series with the motor, and its output drives a 0-15 volt meter but without the voltage multiplier resistor, so it effectively is a 0-1.5 amp meter. As the speed isn't much of an indicator of loading, I watch the meter and shoot for about .75 amps when doing what that little mill calls a roughing cut. I did 2 or 3 other tricks with the relays for direction (with which I control some DPTD icecubes to do the real work), like a 20 ohm 20 watt resistor is dropped across the motor when its turned off, so spindle stop time from full speed in perhaps a long second. With the M5, G4p2, m4 in my gcode, so I can stop and reverse it from the gcode, but have never needed to do so. If I ever fit an encoder, I could do rigid tapping or thread cutting. The PMDX-106 is pretty decent, seems to have a very linear speed response in close enough to real time for anything I have wanted to do. Compared to other such cards I have tried, it is hands down the winner. Yes its more than the 'other' controller, but many times more capable IMO. No surprises, it Just Works(TM). I think in the future, my lathe, which does have an encoder with feedback on it, will work noticeably better when I install one of them. 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) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! I often quote myself; it adds spice to my conversation. -- G. B. Shaw ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
