On Tuesday 16 February 2016 12:55:38 Mark Johnsen wrote: > I have a converted Anilam Crusader M to linuxcnc and I was looking at > the Westamp Servo amplifier and I'm not sure which model Anilam put in > the machine. I think it's a 10amp cont/22amp peak, but not sure. > > I have been able to find a manual for the amplifiers, but the manual > uses a different part numbering scheme and I cannot discern which > model is in the machine. > > AMPLIFIER PART NUMBER(s) > ASSY 30059-75 (Part number on the blue circuit board with '75' > hand-written in) > MODULE 30060-75 (Part number on the sheet metal sticker - entirely > hand written) > > MANUAL PART NUMBERS - The manual lists THREE MODELS: > A651x-10C: 10amps cont/15amps peak. Switching freq 16Khz > A651x-10E: 10amps cont/22amps peak Switching freq 5Khz > A651x-10F: 10amps cont/30amps peak Switching freq 5Khz > INPUT POWER (all models): 10VAC to 70VAC Bus power, 120Vac at 2amps > Bias Power. > > SEM MT30M4-59 MOTOR specs: > Cont Stall Torque: 3Nm > Cont Stall Current: 5.6amps > Torque Const: .54Nm/A > Peak Stall Torque: 14Nm > Peak Current: 30 AMPS > Motor volt gradient: 59V/1000rpm > Max armature Voltage: 140V > Max RPM: 2400rpm > Tacho Gradient: 9.5V/1000rpm > > Since I have the motor specs, knowing exactly which amplifier I have > isn't that important, but as I started looking into this, I'd like to > understand what the designers did... > > Here's a picture on ebay of the amplifier: > http://www.ebay.com/itm/131240516302 > I specifically showed that one because they reference the Servo > Dynamics SD1525-10 (15amps cont/25amps peak). My understanding is > that when Westamp closed, the engineers moved to Servo Dynamics and > their SD1525-10 is a replacement for the aforementioned Westamp board. > > LINK to MANUAL for A6511: > https://sites.google.com/site/bmklawt/home/westamp-documentation/westa >mp-manual This manual is from an Anilam conversion by "Bmklawt" with > the help of Jon Elson. On the website, there's also links to a > circuit diagram of the system. > > On page 18 of the A6511 manual, there is a picture of a board layout > with the part number: 30059-___. This is the right manual... > > Since my amplifier 'squeals' something awful (assuming switching freq > 5Khz) and the motor has a 30amp peak current rating, I'm making an > assumption that the amplifier is an A6511-10E (22amps peak) or -10F > (30amps peak). > > ************* MEASURED INPUT POWER TO AMPLIFIERS********* > The measured spec confuses me - I measured 80Vac at the transformer > output and the amplifier manual says that input power should be 10VAC > to 70VAC, there might be a 15% 'overage' allowed? Or I have something > wrong here? > > ACTUAL MEASUREMENTS > 120Vac before the transformer > 80Vac after the transformer > 113Vdc at the Capacitor and input to amplifiers. > > One thing to note is that the amplifier board has a rectifier wired in > and attached to the sheet metal. > > ***************** WHAT REPLACEMENT DRIVE?? *********************** > Also, for someone wanting to replace one of these older amplifiers, > what is a good replacement? John Elson had recommended a Copley 422 > on a previous mailing list. > His own servo amp, intended for an ultrasonic PWM input, has a 160 volt, 20 amp rating. I am amazed at what that amp can do with a 126 volt DC power supply, to a 1HP rated PMDC motor that came on this Grizzly G0704.
The OEM driver, a triac driven unit, ran it at around 2300 rpms wide open, but only 600 in reverse. Running on wall plug 126 volts AC. I ripped it off, box and all, and put one of Johns amps in in its place, driving it at about 30 kilohertz, pwm. I have the keap current limit set for around 16 amps if it should get stalled. Jon's amp runs it a bit over 2800 revs, either direction. At 2500 revs, I can enter an M3 to start it, or an M4 to reverse it. I put a rate limiter in the hal to slow the reversal down, bujt even with the rate limiter, it can switch from running 2500 FWD, to 2500 reversed in nominally 1 second flat. Doing rigid tapping at 200 rpms, the turn around at the bottom of the stroke is just a click. If I had the sheckles to convert everything to servo's, Jons amplifier would be my obvious choice. I am using 2 of them as the spindle motor in that toy lathe is now a 1HP treadmill motor. I had to slow the reversal way down on that machine else it slipped the teeth right off the drive belt AND the smaller pulley. 3 times so far. $pen$ive. > I would agree that if the Westamp amplifier is the -10E > (10cont/22peak), then the Copley 422 is perfect at 10amp cont/20amps > peak, but if Anilam used the -10F (10cont/30peak), then the 423 > (15cont/30peak) is a better choice. I suppose a question is, how much > of that 14Nm do you really need?? > > On ebay there are some inexpensive AMC 30A8V amps, but they're only > rated to 80Vdc input, too low:-( > > *************** WHICH ONE IS IT? ***************************** > If anyone has some info on which westamp drive is actually in the > system, I'd love to know. > > On a side note, I saw that the 29794 transistors are on ebay for > between $25 and $45 each... The parts might actually be worth more > than the board... > > Regards, > Mark > > PS - it turns out I have some Copley 800-992, which are factory > configured 422's... Might be nice to make a switch. > ---------------------------------------------------------------------- >-------- Site24x7 APM Insight: Get Deep Visibility into Application > Performance APM + Mobile APM + RUM: Monitor 3 App instances at just > $35/Month Monitor end-to-end web transactions and take corrective > actions now Troubleshoot faster and improve end-user experience. > Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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> ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
