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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Ping Iggy. Advice needed. [Long]
Hi Iggy.
I inherited a year or two ago, a nice Shizuoka ST-N CNC mill. This is a 3-axis machine with a nice large CNC rotary table giving it a 4th axis. It was given to me by a good friend who couldn't fit it into his workshop. It has low hours and was only ever used for machining acrylic. This Japanese machine was originally sourced from and fitted out by a UK company, Matchmaker, who fitted an unknown control system with arm mounted CRT and button panel. The only thing we can easily recognise in the bird's nest that is inside the control cabinet is the 4qty, Westamp PWM servo amp model no. 30060-3. I take it that this means we have servos rather than steppers? This makes sense as they (large) motors have 4 brushes. I think they have 2-wire tachos built in too. I'm not sure what encoders we have yet as they haven't been stripped out for identification. The control system is dead. The CRT is dead, and I don't trust the Westamp boards. However we'd probably keep the big DC PSU, buy 4 new servo drives and fit a variable freq drive for the spindle. This brings me to the big question. What controller should we choose? We'd like to do as you have done, and use EMC2 on a (Linux?) PC, but don't have any idea of what controller we need for the 'bit in between'. I'd appreciate your advice on this if can spare a moment. Many thanks in advance. JB |
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