Well.. like I said: "unless I am missing something" :) Thanks for pointing my error out, it makes sense now. A couple of other questions if I may: -I see some photos where the chuck has some protective cover right behind it. Some short round tubing painted in Denford green and black stripes. My Orac...

Well, I haven't measured the pulley reduction, but if the VFD goes up to 87Hz, the motor should spin at (87 / 60) * 1400 = 2030RPM. The spindle pulley being larger then the motor pulley, it would still not hit 2000RPM at the chuck. Unless I am missing something.

How exactly does the Orac spindle get to 2000RPM if the motor is only 1400RPM? Not to mention the pulley reduction.

Hi, I am using probably the cheapest BOB you can buy. It looks just like this one: http://www.ebay.com/itm/CNC-5-Axis-Interface-Breakout-Board-For-Stepper-Motor-Driver-CNC-Mill-MACH3-DX-/251728061990?hash=item3a9c296626 A poorly written manual can be found here, if you need an overview: https://www....

I still have the original drivers and they were working in the original setup. However, as I read on some other thread in here, they don't take 5V signals for step/dir. At this moment the Orac is running using some TB6600 based drivers. These don't provide the expected amps and only go up to 40V as ...

Hello,
Has anybody managed to use the original spindle sensor(s) on the Orac for a Mach3 conversion? I would need to know what voltage they need to be powered at and if that PCB next to the spindle will output 5V signals for my BOB.
Thanks

Hello, I just purchased a Denford Orac and I am trying to convert it to more modern electronics. Before I tear it apart, is there anything that can be reused? Such as the drivers: do they take common step/dir signals so that I can use them with a parallel port breakout board? The VFD: can it be cont...