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Topics - oskars

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Shortly about machine:

XYZ motors
I will try to use original motors + UHU servo controller + original transformers DC 140V. I think that XY is around 1,5 - 2 kW each, Z - 3-4kW, high torque motor with 8 brushes.

Spindle motor
Original - Mitsubishi DC 220V, 7,5kW motor with controller. On place, but I think to remove, because no docs and nobody here can make it working. Maybe good but...
Solution -  11kW asynchronous ~380V 3000rpm motor + VFD (0-10V control)

Spindle gearbox
Two gear gearbox. Hydraulically switched.

Tool changer
20 tool tool changer. Difficult part :-) Hydraulically switched (at the moment no ideas how it works, but that is question of time :-),
With help of 5 proximity switches return information to PLC about current tool.

Here is my idea how to set up machine:

Motion control:
Mach3- Multifunction CNC Board - UHU drivers - motors
Multifunction CNC Board  from http://www.cnc4pc.com/Store/osc/product_info.php?cPath=33&products_id=48

Spindle rotation and speed control
Mach3 - Multifunction CNC Board ( 0-10V)  - PLC (control gearbox, depending on speed from Mach, PLC will switch to 1. or 2. gear) - VFD (0-10V) - 11kW motor + encoder on spindle (return to PLC spindle rpm to adjust rpm)
I may purchase very cheap PLC 48DC IN / 28 DC OUT + 4 analogues IN (0-10V, 4-20ma) + 2 analogues OUT (0-10V, 4-20ma)

Tool changer
Mach3 - Modbus Serial Server - PLC ( control toolchanger, spindle position, drawbar) - return signal to Mach after tool change

info about Modbus Serial Server  -  http://www.cnc4pc.com/Store/osc/index.php?cPath=39
+ expansion board

After all it looks quite expensive conversion. But in my opinion this is cheapest way to get all working.
Please advise, is my selection correct or I have mistakes?

And last question - will be possible to set up Mach to control all these features:
- Spindle speed and direction control in my case?
- tool changer, signal from Mach to PLC about tool change and then return "OK" signal from PLC via Modbus to Mach to continue work?

I really appreciate honest advise before I bought expensive hardware!

Regards,
Oscar












2
Third party software and hardware support forums. / low cost 72 I/O card
« on: December 01, 2007, 03:44:08 PM »
Is it possible to integrate this card in Mach?

http://www.futurlec.com/PCI8255.shtml

a lot of problems may be solved - tool changers, spindle gearbox etc.

Or maybe there already is similar card integrated?

Regards,
Oscar

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