Denford Triac VMC with ATC Conversion / Fix

[Chaz]

OK, so first pics. There is something missing in the top left of the cabinet ...... and then on the top right of the ATC. Any idea what this could be? The wiring diagram doesn't seem to show what this is (shows as empty in the commissioning data). Will have to trace the wires to see where it goes. The rest look like pneumatic tubes or similar.

[Chaz]

OK, this is the ATC wiring diagram. I am assuming that its a servo on the basis that there is some encoder wiring. Would this be correct? The panasonic unit seems to be some form of geared motor.



For the missing bits, the cover of the ATC is off but I dont think anything goes into the cover, not sure, will check when I get home.

[Chaz]

These look to be the XYZ drivers. Assuming that they are in working order, are they usable / decent?

http://www.irtsa.com/IMG/pdf/me1300re.pdf

[Chaz]

Spindle Controller is http://www.sprint-electric.com/techn...0Man-iss-h.pdf

Sprint 1200.

Any thoughts on the quality of this? Unless its faulty, will aim to reuse this.

[JohnHaine]

Hi Chaz,

Well, looks like a good buy with some nice extras! You don't need power to open the latch, there is a discrete hole somewhere round the back where you can insert a thin rod to activate it. I can't remember exactly where and not at home at the moment to look. I think I probably looked up the latch on the web to find out about it. If I remember I'll have a look at home this evening.

As this mill uses AC servos rather than steppers I suggest that you also join and post an enquiry at the Denford site http://www.denfordata.com. They have the wiring diagrams there and you should be able to get information on the servo drives. If the problem is the PC OS not booting I'd suggest the first place to start is there, and try to see if you can use the mill as-is, if necessary with a new PC.

[Chaz]

Hi Chaz,

Well, looks like a good buy with some nice extras! You don't need power to open the latch, there is a discrete hole somewhere round the back where you can insert a thin rod to activate it. I can't remember exactly where and not at home at the moment to look. I think I probably looked up the latch on the web to find out about it. If I remember I'll have a look at home this evening.

As this mill uses AC servos rather than steppers I suggest that you also join and post an enquiry at the Denford site http://www.denfordata.com. They have the wiring diagrams there and you should be able to get information on the servo drives. If the problem is the PC OS not booting I'd suggest the first place to start is there, and try to see if you can use the mill as-is, if necessary with a new PC.

Thanks. That will be the first attempt. An issue I have is no 3 phase at home. Is it worth buying an inverter if the items might be changed later? From what I can tell from the wiring diagram (which I have), the only thing that runs from 3 phase is the coolant motor and perhaps some of the secondary voltages from a primary fed 3 phase transformer. I need to double check however.

I wasnt aware the PC was 'standard'. Ill research about how to sort, I have a number of older motherboards / ram / CPU that will be more than good enough for this. Also got the original CDs.

This uses the Fanuc system I think? So if I draw something and create the G Code, is this where the post processors come in?

Thanks for your response.

[JohnHaine]

You could probably replace the transformer with a single phase one provided the overall rating is sensible. Or replace the whole PSU.

If it is a DC motor with the usual thyristor controller then that will probably run happily from single phase with some careful re-wiring. Actually checking the manual you referenced above it has a single phase mains connection anyway!

The coolant pump is more of a problem but its power is probably low and you can run 3 phase motors from single phase using some capacitor trickery - or use a cheap inverter - or replace the motor - or dispense with pumped coolant!

[Chaz]

You could probably replace the transformer with a single phase one provided the overall rating is sensible. Or replace the whole PSU.

If it is a DC motor with the usual thyristor controller then that will probably run happily from single phase with some careful re-wiring. Actually checking the manual you referenced above it has a single phase mains connection anyway!

The coolant pump is more of a problem but its power is probably low and you can run 3 phase motors from single phase using some capacitor trickery - or use a cheap inverter - or replace the motor - or dispense with pumped coolant!

Yep, this might not paste well, but apart from coolant pump, nothing else uses 3 Phase.

	Control Logic	Voltage	Current	Controller / Driver	Comments
X Axis	+/- 10V	220V		IRTA 1306
Y Axis	+/- 10V	220V	Fuse	IRTA 1306
Z Axis	+/- 10V	220V		IRTA 1306
Spindle		220V	10A	Sprint Electric 1200	DC Motor - 12 Amps?
ATC Motor		220V	3.15A
Coolant		415V
Lighting		12V			50VA
Monitor		220V

[Chaz]

This is the coolant pump. Id like to have this option if I can. Small power, so must be an option to sort this. Id like to upload the schematic (in pdf somewhere) and then link it for reference to anyone interested.