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Thread: Adding EIA to T2 mazatrol
03-21-2017, 02:12 AM #61
That post I linked to is no good, it's for a later model integrex or similar.
It looks like the generic fanuc post is a good place to start.
I was making progress on worked and what didn't and my spindle drive or motor took a crap. Really frustrating.
I might abandon the mitsi freqrol and go with a cheap inverter spindle drive.
03-22-2017, 02:46 PM #62
03-22-2017, 04:13 PM #63
The stuff that is likely to fail in the high current portion of the drive would be:
Main Rectifier diodes
DC Link Capacitors
You can check all of that with a quality DMM, even without a spec sheet.
Just be sure to check for high DC voltage in those big capacitors before you do ANYTHING else. They can store upward of 600 volts.
Make sure the cap is close to the value printed on the label in uf.
Make sure the TMs are relatively close to each other in their resistance values between E, B, C terminals.
It is tough to get good readings without taking out the bus-bars, etc.
That's where your digital camera will save you. Take good pictures before pulling anything out.
If one of those parts is failing softly due to heat, you can swap in a new component before it goes completely and burns up other stuff.
You might be able to save that drive with some inexpensive parts.
If you know someone with a megger, disconnect your spindle motor and check it too.
I've saved a Fanuc spindle drive with a $10 resistor.
cnctoolcat liked this post
03-22-2017, 05:32 PM #64
03-22-2017, 05:51 PM #65
That's a good way to think about it. You have to figure the old drive will die out completely someday.
I'm interested in seeing the conversion process unfold. Sounds like a fun project (as long as the machine isn't holding up any paying work).
03-22-2017, 06:05 PM #66
You can find the DK434 chips on Ebay.
With an oscilloscope, it is possible to determine which firing circuit is bad on the SE-IO1 main board. This is what MEAU does, as they only replace the minimum necessary components.
I have successfully rebuilt a SE-IO1 by replacing -all- the main components in the firing circuits: DK434, and all the related: capacitors, transitors, diodes, and resistors.
The transistors are a PAIN because you have to de-solder the heat sinks first.
But, I too am interested in a "best spindle-drive retrofit" practices for Mazak's with T2/T3 controls.
cwtoyota liked this post
03-22-2017, 06:16 PM #67
03-23-2017, 02:38 PM #68