![]() ![]() Functions include mm/inch, radius or diameter display, tool offsets, taper measure and 200 SDM zero memory.Supplied with the M-DRO MDC720 2 axis console offering high performance with dedicated turning functions.A robust non contact system with the encoder being fully sealed to IP67 and flexible armoured cable.High precision 5 micron resolution magnetic encoders on both the cross slide and carriage (higher resolution upgrades are available, please contact us).High quality CNC machined encoder brackets with all the required bolts and fixings supplied.Simple install and removal of encoders, to restore the machine back to factory original specification.NO DRILLING or lathe modifications required.2 axis DRO kit designed to fit directly onto the Super 7 with 31" between center bed. ![]() ![]() Mounting holes can be drilled and pulleys can be bored or shafts turned, but watch out for shaft height. ![]() A larger motor, like 1 HP, and a slower motor, like 1150 RPM, will probably have a larger frame with 7/8" shaft. The 56 frame describes a certain set of mounting bolt dimensions on the base, the shaft height, and the 5/8" shaft diameter. Totally enclosed VFD's are scarce, but it is simple to enclose and cool them so chips will not get in. Similarly, you have to keep chips out of the VFD. That is why you need a TEFC motor around machine tools. Single phase motors have exposed hot components inside around the centrifugal starting switch. Possibly the old GE motor failed because it ate some chips. I won't go into the reasons here, but I would look for a 3 phase 1 HP 240 V 1150 RPM motor and VFD to replace a 1/2 or 3/4 HP 1725 RPM single phase motor.Īs for source, I just watch eBay for low prices on motors and VFD's with the specs I want. I also prefer a lower nameplate speed on the motor. I prefer to use a larger HP motor than originally called out for the machine when using a VFD. The motor can be rated from 208 to 240 and will still work OK. VFD's are very tolerant of voltage variations on both input and load. For the benefit of someone who is unfamiliar with three phase and VFD controls: Several VFD makers (also called AC drives) make a VFD that will run a 220 V three phase motor of 1 HP or smaller off an ordinary 110 V household outlet. ![]()
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