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 Post subject: Retrofitting Spindle Digital RPM meter to a Viceroy lathe
PostPosted: Thu 09 Apr , 2015 10:36 am 
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Joined: Sat 19 Aug , 2006 11:31 am
Posts: 221
Location: New Zealand Hardware/Software: Viceroy TDS 1/1GB lathe, Imperial, stripped down and rebuilt.
Viceroy Taper/Tracer attachment, Shop made cross slide tracer attachment, VSD.
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:
File comment: 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
IMG_4641 (768 x 576).jpg [ 32.34 KiB | Viewed 1569 times ]
File comment: A heavy duty bracket to hold the sensor.
IMG_4621 (768 x 576).jpg
IMG_4621 (768 x 576).jpg [ 32.98 KiB | Viewed 1569 times ]
File comment: The sensor mounted inside the headstock. It is bolted to holes drilled and threaded from outside the headstock.
IMG_4640 (600 x 450).jpg
IMG_4640 (600 x 450).jpg [ 78.82 KiB | Viewed 1569 times ]
File comment: A paper/cardboard mock up of the control panel with RPM meter to test ergonomics.
IMG_4644 (600 x 450).jpg
IMG_4644 (600 x 450).jpg [ 32.61 KiB | Viewed 1569 times ]

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Dazz
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 Post subject: Re: Retrofitting Spindle Digital RPM meter to a Viceroy lath
PostPosted: Fri 07 Apr , 2017 12:03 pm 
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CNC Expert
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Joined: Sat 19 Aug , 2006 11:31 am
Posts: 221
Location: New Zealand Hardware/Software: Viceroy TDS 1/1GB lathe, Imperial, stripped down and rebuilt.
Viceroy Taper/Tracer attachment, Shop made cross slide tracer attachment, VSD.
Hi
Here is the finished control panel.


Attachments:
IMG_4722 (600 x 450).jpg
IMG_4722 (600 x 450).jpg [ 40.19 KiB | Viewed 207 times ]

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Dazz
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