Rigid Tapping and Spindle Orientation

[Ben Colby]

As my tech searches for drives to interface with my existing Sanyo motors
on my Brother TC-221 machine tool that will be run by Camsoft Pro, it has
occurred to me that the spindle drive has to be able to orient the spindle for
tool changes and has to be able to rigid tap.

I assume there must be some sort of encoder or feedback on the spindle motor that accomplishes these things. We need recommendations on a spindle drive for the spindle motor that specs out at:

Max Rigid Tap speed 3000 rpm ( this isn't a must, but it's what the machine)
(was capable of before refit)

Spindle Motor 3.1 KW (continuous) 4.1 KW (for 30 minutes)
Rated output: 3100 Watts
Max torque: 120 kg.cm
Rated spindle Speed: 3000 Rpm
Rated Voltage: 140 volts
Rated Current: 36 amps
Max Spindle speed: 6000 Rpm

thanks in advance,
Ben
COBRO Mfg.

[Ben Colby]

Number of encoder pulses = 1024 P/R (line driver output)
Tako gene output voltage = 1V/ 1000 rpm

[Al_The_Man]

If this is a form of 3 phase induction motor type spindle, for both rigid tapping and spindle orient you need an encoder on the final spindle shaft.
For a top of the line Spindle drive, Mitsubishi would be my choice, or a cheaper alternative is a high quality VFD that has a PG, pulse generator on the motor or a encoder equivalent.
Does the present motor have a PG or encoder on at present?
I see you mention a Tach, would this be a DC motor? If so you could use a AMC 100A40(AC) or B100A40(AC).
The (AC) gives you built in power supply.
Al.

[ampedup]

Al,
The spindle motor is a Sanyo Denke servo motor. It has a 1024 PPR encoder on it but I want to refit it to a 2500 PPR with 5V (instead of 15 volt) hall sensor from encoder products.

Our budget can't afford the AMC drives, $2400 for the digital and $1800 for the analog. I am going with an Anaheim Automation analog unit for the spindle and the 3 axis.

As for the rigid tapping part, that should be more of a function of the controller and software than the motors, drives and encoders?

Any additional input is always appreciated.
Al

[Al_The_Man]

For rigid tapping the Z axis servo is geared to the spindle shaft encoder.
If you replace the encoder with one with with hall tracks you not only need to know the pole count but you have to align the encoder with the relative poles, I have posted methods of doing this in earlier posts.
Al.

[ampedup]

For rigid tapping the Z axis servo is geared to the spindle shaft encoder.
If you replace the encoder with one with with hall tracks you not only need to know the pole count but you have to align the encoder with the relative poles, I have posted methods of doing this in earlier posts.
Al.

And I am looking forward to reading those!