The illusive Boxford 260vmc

[GeorgeD]

Yep,thats a RPM timing sensor.

[irving2008]

Irving, your wish is my command.....
...
Does this help?

Yes. with that number of holes was probably used for closed loop spindle speed control rather than just speed measuring. Have you retained the spindle speed controller and do you plan to reuse it? Even at this age it would have been 0 - 8v or 0 - 10v control signal and MACH3 can drive that through a suitable speed interface and that might be a lot easier than finding a suitable replacement speed controller. Any idea what the max spindle speed might be?

Yep,thats a RPM timing sensor.

Thanks for that in-depth insight...

[Ricardoco]

Yes. with that number of holes was probably used for closed loop spindle speed control rather than just speed measuring. Have you retained the spindle speed controller and do you plan to reuse it?

The Controller for the spindle is a Lenze 534. I will be keeping this on the machine.

Even at this age it would have been 0 - 8v or 0 - 10v control signal and MACH3 can drive that through a suitable speed interface

Ive ordered an interface for mach control from cncdoctor and yes it is 0-10v

Any idea what the max spindle speed might be?

The motor has the numbers 370-4000 engraved on it however with gearing i think we are looking at around 3000rpm max at the tool, probably 2500-3000rpm. The spindle pickup was wired directly to the old main board so i can only assume it was processed there but as that is now gone i need an alternative and it would be nice to have the side effect of a display on the machine itself.

Thanks for that in-depth insight...

:lmao:lol that made me really laugh!!

[Ricardoco]

For the life of me I cant understand why we dont have a Usefull little circuit like the Trexon Tachulator from MKC Tools here on a UK site, or if there is?? why it is so difficult to find, Buy it, Fit it, Use it, Enjoy it, simplezzz. (obviosly not)