Re:Hardinge CHNC 1 Lathe

Well it looks like the Hardinge CHNC 1 Lathe I bought is going to get converted to EMC. Robh has been working with me to try and get the original control to work. It looks like the PLC opto might be blown. Everything else seems to work.

image missing http://i47.photobucket.com/albums/f163/johnplctech/Hardinge/P1010020.jpg

Here is a crummy video of the axes moving about using some switches for enable and direction and my lab power supply to supply a small voltage to the velocity inputs.



Working on a 10hp phase converter for this one. I should start another thread for that project even though it will be mounted in one of the electrical cabinets of the Hardinge.

John

I'm jealous of your spindle. I have a threaded spindle which makes me a little nervous. If you get any information on how to convert a threaded spindle to A2-5 or if you have a lead to a CHNC spindle, please let me know.

I have a rotary phase converter, and have only one machine left that uses it. A VFD is much easier to deal with. A phase converter actually gives you single phase and a funky in between phase (0 , 180, 270 degrees). I suppose it works but it's not ideal. My HNC works well on 240 VAC single phase with a spindle and coolant VFD.

www.wallacecompany.com/cnc_lathe/HNC/00023-1a.jpg
www.wallacecompany.com/cnc_lathe/HNC/

I hooked up a 3hp VFD to try and run the electrics but it kept letting the smoke out of some suppressors so I took it off and hooked up a small phase converter for now. Does your VFD give you a sine wave output? jmkasunich told me that most VFD's use a PWM output and not to use that for the controls. My spindle drive is a siemens drive and very touchy about the voltages on all three legs being even. This lathe is 1987 or 88 model with more safety interlocks than you can shake a stick at.

John

Nice to see some pics up here John
this will be one very quick swift retrofit if needed and will be a quick little machine also, ether way on control side.

dont forget the spindle and axes do a 3Phase to DC buss conversion on the voltage, so a phase converter does not limit the machines performance (only in fact you need to supply enough voltage/amps on spindle starts), his spindle looks happy on a laggy 3rd Phase leg (10% error margin you can have on voltage and phase i believe is the max)

once i get the spindle data manual you can get spindle going too

Rob,

Glad to see you on here too. I need to figure out how to enable the interface board and or some other way to turn on the cr's so I can release the spindle brake instead of sticking a nail in the solenoid of the valve. I figure this would be a good place to cover the EMC integration of the Hardinge.

Thanks
John

I had noise suppressors on the spindle motor leads. These smoked the first time I tried to run the motor with the VFD. I removed them, and the motor and VFD work fine. They smoked because the VFD has a PWM output which has a high frequency component, which these suppressors were designed to suppress, and gave there all doing it. I did need to put a noise suppressor on the input to the VFD. From the other posts, it sounds like your setup is different than mine. I have EMC2 give me a spindle speed value, then a DAC voltage to my VFD, then VFD output to the motor, easy peasey. The VFD has a three phase input, but I cheat, and give it single phase. The only other three phase bit is the flood pump motor, which has its own VFD. My original control power supply ran off of two legs of the three phase. It now runs from the two leads from single phase 240 VAC. It sounds like you have some other three phase stuff? If you have control electronics on three phase, my guess is it gets converted to some other voltage before it gets used. You may have input voltage and phase options on the control supply. My guess, as robh indicated, if this three phase input gets converted to DC, the input diodes and capacitors will be stressed more as you get away from true three phase. Some VFD's have over sized input circuits to allow for three or single phase input. This is mostly me thinking out load, so take it with a grain of salt.
--
Kirk Wallace
www.wallacecompany.com/machine_shop/
www.wallacecompany.com/E45/index.html
California, USA