Hardinge HNC retrofit and where to start

andy


I do think that is the case on the third resolver, I have not taken the cover off of the resolver on the spindle but I am pretty sure that is what it is


what is the average cost of the d525 pc and where should I buy one.



Bob

The spindle has a resolver and a pulsecoder,which is 12v,so you really want to replace the both with a single encoder.If you want a handwheel ,you will need an encoder input for that also.You could get a 5i23(i think) a 7i33 and a resolver board and keep your resolvers,which are admittingly more robust then encoders.You will still need some sort of i/o.The machine with out any operator interface is about 16 inputs,10 ac out puts and about 6 dc ouputs.You could use encoder to resolver boards.You would be WAY ahead of the game to buy some inexpensive encoders,a 5i20,a7i33.You then would have two 50 pin connectors available for i/o.

If you want to keep the stock amps and ditch the refridgerator size cab,you will to add an auxillary cab on the back of the machine.You will have to replace the for/rev contact system with some sort of VFD.Trying to integrate the vari drive and brake is an exercise in aggrivation.

An HNC was a a NC machine,not a cnc.Trying to find some one who can still fix the 550t is also an exercise in paitence.If it was me,id buy some used amps for 150 each,a ac motor for 300,a vfd for 500 and encoders for 300 or so.You will beat your head against the wall using all that old stuff.You would no longer need a mechanical spindle brake,you can add a braking unit and use the braking function in the drive.

Below are pics of my cabinents.The wiring on the i/o is a bit messy.Hopefully most of it will be replaced with a usb cable....

other cab

as promised I will try to upload more photos of what I have to work with.

Andy


check this out talk about lots of wiring

I assume this is the turret encoder, all I have seen online have the insulation removed

is that necessary or is it for repair?

Bob