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Show"N"Tell ( Your Machines) / Help! Hardinge CHNC Retrofit
« on: July 07, 2007, 10:33:38 AM »
Ok.
I have a Hardinge CHNC (serial # CNC 532) and it is very clean and nice and was apparently holding super tight tolerances before the control failed (a blessing I'm sure :-).
Anyhow, I have cleaned it up, and am in the process of getting it ready to work.
My plan:
-use Mach 3 turn to drive it
-I have an Axxus DB1 parallel port breakout board
-I have a 12V MPG (I know 5V is preferable)
-use the still mounted DC servos (ElectroCraft 660) with some GeckoDrive G320 or G340 drives
-pull the resolver/tachs off and put encoders on X and Z. Since I want 0.0001" positioning, and the ballscrews are 0.2" pitch, 500 CPR encoders in quadrature should give me that.
-figure out some inexpensive method for controlling the turret. I'm all ears.
-Get a drive for the DC spindle motor. Not sure how many KW, but it looks like 3+ KW or so. It is a permanent magnet DC servo, 3500 max RPM. Anybody have specs on this and drive recommendations where I can control speed/direction from Mach 3?
I'm open to suggestions on how to best get this thing up and running (turret, spindle, ...).
I've attached a couple of pictures of what it looked like when I got it (NOTE: brown stuff is not rust, but some kind of oil buildup/enamel), after a little bit of elbow grease/WD40/rags/..., and the DC spindle motor.
More pictures are available and I will have followup posts as I make progress.
Thanks!
-Ralph
I have a Hardinge CHNC (serial # CNC 532) and it is very clean and nice and was apparently holding super tight tolerances before the control failed (a blessing I'm sure :-).
Anyhow, I have cleaned it up, and am in the process of getting it ready to work.
My plan:
-use Mach 3 turn to drive it
-I have an Axxus DB1 parallel port breakout board
-I have a 12V MPG (I know 5V is preferable)
-use the still mounted DC servos (ElectroCraft 660) with some GeckoDrive G320 or G340 drives
-pull the resolver/tachs off and put encoders on X and Z. Since I want 0.0001" positioning, and the ballscrews are 0.2" pitch, 500 CPR encoders in quadrature should give me that.
-figure out some inexpensive method for controlling the turret. I'm all ears.
-Get a drive for the DC spindle motor. Not sure how many KW, but it looks like 3+ KW or so. It is a permanent magnet DC servo, 3500 max RPM. Anybody have specs on this and drive recommendations where I can control speed/direction from Mach 3?
I'm open to suggestions on how to best get this thing up and running (turret, spindle, ...).
I've attached a couple of pictures of what it looked like when I got it (NOTE: brown stuff is not rust, but some kind of oil buildup/enamel), after a little bit of elbow grease/WD40/rags/..., and the DC spindle motor.
More pictures are available and I will have followup posts as I make progress.
Thanks!
-Ralph