My machine is a 1997 Hurco Hawk 5 with Ultimax single screen control. The machine has a 3 phase 5hp spindle motor, DC baldor servo motors, dc drives, a 486 computer that runs the control and hurcos proprietary ultimax software. The mill has variable speed via a variable ratio pulley system in the head of the mill. It works similar to a variable speed torque converter where the pulley rides up and down on a coned pulley to variate the ratio of the spindle to motor. I plan on pulling all of this out and going to a fixed 2:1 belt drive as the current belt drive vibrates a lot and is loud as hell. for this I opted to go with a variable frequency drive(VFD) to control the spindle RPM utilizing the analog output on the acorn board. My machine has a air controlled spindle break that I plan to keep using along with a breaking resistor to go along with the vfd. I will be utilizing flood coolant and mist coolant on this machine. Will also be providing power to the existing lube pump. The spindle will need a cooling fan added since it will no longer be running at a constant speed. I also plan on adding a rotary encoder for spindle positioning.
Here are some pictures of the machine and components that I have acquired for the retrofit.
I purchased the Centroid Acorn board utilizing cnc 12, DMM DYN4 Servo Drives, DMM 1.3KW A.C. Servo motors, a 7.5KW Huang Yang VFD with the breaking resistor option.
miscellaneous electrical components I have on hand so far are as follows:
- DIN rail, slotted, 35mm, 7.5mm height, 1m length x 2
Standard DIN rail support bracket, 25mm height, zinc plated steel
Eaton miniature supplementary protector, 50A, 480Y / 277 VAC / 96 VDC, 2-pole, C curve, thermal magnetic, 5kA SCCR, 35mm DIN rail mount (plan on using this to provide power to the servo drives)
Eaton miniature supplementary protector, 50A, 480Y / 277 VAC / 96 VDC, 3-pole, C curve, thermal magnetic, 5kA SCCR, 35mm DIN rail mount.(this will be providing power to the VFD which I plan to be feeding with 3 phase power from my phase converter)
Fuji Electric IEC contactor, 65A, (3) N.O. power poles, 24 VDC coil voltage(Using as the Emergency stop contactor for acorn)
LR series line reactor, 230 VAC, 10hp, 3-phase, 30.8A, 3% impedance
Eaton miniature supplementary protector, 15A, 480Y / 277 VAC / 96 VDC
Relay socket, 35mm DIN rail or panel mount. For use with 784 series cube relays.
Ice cube control relay, socket mount, 24 VDC coil voltage, 4PDT, 15A contact rating, 14-pin configuration, LED indicator, push-to-test
Roxburgh EMI input filter, 120/240 VAC, 1-phase, 1A (line filter for the signal side on dmm drives)
Mean Well EDR-120-24 Single Output DIN Rail Power Supply 24 Volts 5 Amps 120 Watt (provides power to the 65 amp contactor)
Schaffner FN2410-45-33 250VAC, 45 Amp Line Filter (power side line filter for DMM drives)