denford triac rigid tapping

Ok. I think this is max speed for a rigid tap at 6mm diameter
1200 rpm
https://youtu.be/mhANVN6tvCI

Added one of my probes tonight :-)
Triac is coming on nicely now :-)
Even made the tapped probe plate on it ( small steps but huge to me)
https://youtu.be/gcapYA04i14

Quote:

---

Originally Posted by m_c

Are you sure your spindle only goes one way?
I'm pretty sure mine had a reversing relay, but I've not got the wiring diagrams handy to check.

For rigid tapping, you need reasonably accurate spindle control, along with accurate positional feedback, which the original DC motor definitely doesn't, and I'd suspect a VFD may struggle to respond fast enough, plus you'd struggle to fit a normal AC motor.
I fitted a 110 frame 1.25kw servo motor to mine, which involved making up a quite substantial adapter (I do have a thread on here with details/photos), as space is very limited.

I've still not got as far as trying rigid tapping, but that is one of the reasons I fitted the servo, instead of repairing/replacing the original motor and drive.

---

I have a 1990 Triac, i want to change the spindle motor aswell. Did you change the complet fanuc mainboard, or just huck the new servo in the fanuc system? It would be great if you show me how you did it.

I hope on your reply

best regards

Paul

most of us have put newer easier to manipulate controls in. hacking fanuc stuff is hard work!
mine is running uccnc on uc300eth motion controller.
if you can find an 80 frame size servo for spindle it will bolt straight on with a adapter plate.

Okay thanks. Did you keep the other motors? I have fanuc servomotors they work pretty well is it possible to keep them or is it better to throw all out and put a new controllboard and servomotors and drives inside?

Thanks a lot for your support.

I retrofitted mine with a Dynomotion KFlop.

Details of the new spindle motor are buried somewhere in this thread - http://www.mycncuk.com/threads/10344...ofit-thread%29

Quote:

---

Originally Posted by PaulMucCNC

Okay thanks. Did you keep the other motors? I have fanuc servomotors they work pretty well is it possible to keep them or is it better to throw all out and put a new controllboard and servomotors and drives inside?

Thanks a lot for your support.

---

i re used the fanuc red cap motors but used new programmable drives to achieve this. works very well.
the drives are not easy to set up. but ok if you know exactly what your doing.
if not probably easier to buy matched motors and drives and swap them over.