Hello
I found a Chinese supplier of cheap digital tachometers specifically designed for machine tool applications.
The trigger 1 pulse per revolution and measure the period between pulses. This means good update times even at low rpm.
They are available in red and blue. I fitted a blue one to the Viceroy to match the colour scheme.
I was able to modify an existing bushing on the spindle to fit a trigger magnet. The bushing retains the rotating components on the spindle and is not loaded.
I was able to mount the sensor on a bracket within the headstock.
CNC Expert
Attachments:
- The existing bushing modified by potting a magnet in a milled slot. A similar slot was milled on the other side to balance the bushing.
- IMG_4641 (768 x 576).jpg (32.34 KiB) Viewed 20849 times
- A heavy duty bracket to hold the sensor.
- IMG_4621 (768 x 576).jpg (32.98 KiB) Viewed 20849 times
- The sensor mounted inside the headstock. It is bolted to holes drilled and threaded from outside the headstock.
- IMG_4640 (600 x 450).jpg (78.82 KiB) Viewed 20849 times
- A paper/cardboard mock up of the control panel with RPM meter to test ergonomics.
- IMG_4644 (600 x 450).jpg (32.61 KiB) Viewed 20849 times
Regards
Dazz
Dazz
CNC Expert
Hi
Here is the finished control panel.
Here is the finished control panel.
Attachments:
- IMG_4722 (600 x 450).jpg (40.19 KiB) Viewed 19487 times
Regards
Dazz
Dazz