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General Mach Discussion / Beaver nc 5 atc
« on: June 13, 2011, 09:35:54 AM »
Hy all
I recently came by a run down nc5 which I've decided to convert to mach 3.
Specs are, x,y,z axis use anilam 140vdc brushed servos with 3nm constant stall.
z used anilam rotary encoder for position, x and y use linear scales, all 3 use tachs.
The mill has a 30 tool atc which is arranged as a ring around the column.
My main issue is with the spindle, it has a 4kw 3phase motor.
This drives an idler shaft via a wide timing belt which in turn drives the spindle through 1 of 2 seperate timing belts.
I can see one clutch which I am assuming is electric and I assume there's another on the spindle to select between belt 1 and 2.
I can see no other mechanical means to alter the spindle speed so I again assume that a vfd or the like was used to give different speeds.
I intend to strip the head as the z axis won't move up and down.
I intend to remove the tool changer as I have no need for one.
I intend to use the original motors, ballscrews and nuts, power supply and anything else that can be found to be operational.
The mill has 4 servo amps so I hope to replace these with 4 viper200 drives to give me the chance to add a 4th axis.
I will incorporate us digital encoders 1000liine.
If anyone has any info on this type of mill I would be very greatful .
rgds gov.
I recently came by a run down nc5 which I've decided to convert to mach 3.
Specs are, x,y,z axis use anilam 140vdc brushed servos with 3nm constant stall.
z used anilam rotary encoder for position, x and y use linear scales, all 3 use tachs.
The mill has a 30 tool atc which is arranged as a ring around the column.
My main issue is with the spindle, it has a 4kw 3phase motor.
This drives an idler shaft via a wide timing belt which in turn drives the spindle through 1 of 2 seperate timing belts.
I can see one clutch which I am assuming is electric and I assume there's another on the spindle to select between belt 1 and 2.
I can see no other mechanical means to alter the spindle speed so I again assume that a vfd or the like was used to give different speeds.
I intend to strip the head as the z axis won't move up and down.
I intend to remove the tool changer as I have no need for one.
I intend to use the original motors, ballscrews and nuts, power supply and anything else that can be found to be operational.
The mill has 4 servo amps so I hope to replace these with 4 viper200 drives to give me the chance to add a 4th axis.
I will incorporate us digital encoders 1000liine.
If anyone has any info on this type of mill I would be very greatful .
rgds gov.