Hello Guest it is June 20, 2021, 08:35:50 PM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - oskars

Pages: 1
1
dear oskar
Hi,could you say me what you mean about "a lot of problems",please.
Thanks
F.khalaj

Problems solved.
We bought OEM industrial machining center CNC with integrated PLC and now everything looks good. I think in one month I will have something to show you. Of course this is not cheap way for home desktop mill/lathes but to retrofit industrial grade Mazak machining center - acceptable way to go. We also changed all motors and drives. Including spindle motor with drive.  Good value for invested money. As soon as we will finish I will post a short report about used electronic and cost.

Regards,
Oscar

p.s. Now Mach will go to plasma cutter. Mach - best value for invested money ;-)

2
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












3
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

Pages: 1