Retrofitting Spindle Digital RPM meter to a Viceroy lathe

Read what other Denford users are doing with their machines and software.
Educational resources, ideas and courseware.
If you have a Denford related success story, please tell us about it here.

Moderators: Martin, bradders, Steve, Mr Magoo

Post Reply
User avatar
dazz
CNC Expert
CNC Expert
Posts: 230
Joined: Sat 19 Aug , 2006 11:31 am
Hardware/Software: Viceroy TDS 1/1GB lathe, Imperial, stripped down and rebuilt.
Viceroy Taper/Tracer attachment, Shop made cross slide tracer attachment, VSD.
Location: New Zealand

Retrofitting Spindle Digital RPM meter to a Viceroy lathe

Post by dazz » Thu 09 Apr , 2015 10:36 am

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.
Attachments
IMG_4641 (768 x 576).jpg
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 3044 times
IMG_4621 (768 x 576).jpg
A heavy duty bracket to hold the sensor.
IMG_4621 (768 x 576).jpg (32.98 KiB) Viewed 3044 times
IMG_4640 (600 x 450).jpg
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 3044 times
IMG_4644 (600 x 450).jpg
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 3044 times
Regards

Dazz

User avatar
dazz
CNC Expert
CNC Expert
Posts: 230
Joined: Sat 19 Aug , 2006 11:31 am
Hardware/Software: Viceroy TDS 1/1GB lathe, Imperial, stripped down and rebuilt.
Viceroy Taper/Tracer attachment, Shop made cross slide tracer attachment, VSD.
Location: New Zealand

Re: Retrofitting Spindle Digital RPM meter to a Viceroy lath

Post by dazz » Fri 07 Apr , 2017 12:03 pm

Hi
Here is the finished control panel.
Attachments
IMG_4722 (600 x 450).jpg
IMG_4722 (600 x 450).jpg (40.19 KiB) Viewed 1682 times
Regards

Dazz

Post Reply