Build Thread- Old Hurco MB11

[gtool]

I was interested in the the viper 200 drives.
The old mill I have uses 90vdc permanent magnet servo motors the x and y are rated at 43 in/lbs and a maximum torque of 216 in/lbs, the z is rated at 103 in/lbs and a maximum torque of 1008 in/lbs.
Each of the axis motors are operated separately from a 90vdc power supply provided by a 72 vac servo amp transformer.
The 3 servos use tachs on the end of the motor and linear scales to provide feed back it is my understanding that the tachs would be removed and the scales replaced with encoders in place of the tachs.
Will the viper 200's drive these motors and what additional boards would I need to hook them up to the pc using mach 3.
How would I control the spindle speed at the moment the machine has a 2 speed spindle motor with a mechanical variable speed drive and electrical clutches which provide a speed range from 125rpm to 3508rpm.

Kind rgds gtool.

[Larken]

A number of people have retrofitted similar hurco's with the same 90 volt motors using the V200s .They handle those motors easily.
Post some pictures of the mill and motors if you can.
You need a breakout board. PC4cnc has a bunch to choose from. You don't need a opto isolated one since the Vipers have a opto step/dir input.

You can put a VFD on the spindle if its 3 phase and leave the pulleys in the middle (1-1). but you still have to change ranges by hand.

larry

[gtool]

In relation to the spindle I was afraid of that.
I have another hurco a kmb1x which has the manual low high gear change over which can be controlled with the vfd, but the mb11 has no manual change over the controller selects either spindle-start-low, spindle-start-high, and a combination of low-clutch, high-clutch, and low-gear, high-gear and uses a proximity sensor to adjust the position of the v belt to attain a programed speed.
I am hoping to convert the smaller kmb1x using your drives first as this should be more straight forward.
Have you any other thoughts on the speed control of the mb11 as I would rather retro it with the same as the smaller mill but would have to go with a hurco type retro if the spindle can't be controlled.
Rgds gtool.

[Larken]

Do you have a diagram of actuators and connections for the spindle range shifting? I guess i don't understand what you mean.
Do you have pictures ?

[freak_brain]

Does the MB1 have a motor to adjust the speed up and down? I know my KM3P has a prox sensor on the spindle shaft with a small 3ph motor to adjust the rpm. Is yours the same?

I am finishing my retrofit using the viper200 and they worked perfectly on my KM3P. I'm not sure how much alike the KM3P is to the MB1 but if I can be of any assistance to you please let me know.

Also, renco sells off a lot of overstock encoders on ebay. Do you know what size shaft they will need to fit?


Allen