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Gallery, Projects and General => How do I?? => Topic started by: slowcoach on January 30, 2010, 07:52:43 AM

Title: Tacho on a lathe
Post by: slowcoach on January 30, 2010, 07:52:43 AM

Hi All, I have been looking around for a Rev/Rpm digital counter to fit onto my lathe. The reason being, I have a phase inverter to power my lathe, it has the facility to dial in any speed I want, but I have know way of knowing exactly what speed the lathes running at  :scratch:. Does anyone out there know of a suitable unit?

Cheers
Rob  :thumbup:

Title: Re: Tacho on a lathe
Post by: andyf on January 30, 2010, 08:52:45 AM

Rob, The cheapo version: to calibrate a variable speed knob on my mill I used a £9 Echowell Star bicycle speedo from Halfords. Ian (boatmadman) put me on to it. Set it so it reads kph rather than mph, and so it thinks it's sensing a magnet fixed to a spoke on a 1667mm circumference bike wheel. Readings from 0.0 to its maximum 199.9 kph translate as 0 to 1999 rpm. Just to check it against my lathe's built-in tacho (with which it agreed) I stuck a tiny magnet into a cork and the cork into the outboard end of the spindle. Doubtless you could devise something more sophisticated, but I know someone who uses a cork all the time unless it gets in the way of long stock etc.

Andy

 

Title: Re: Tacho on a lathe
Post by: ksor on January 30, 2010, 10:34:50 AM

Take a look here:

http://mkctools.com/ (http://mkctools.com/)

Title: Re: Tacho on a lathe
Post by: slowcoach on January 30, 2010, 11:36:51 AM

Thanks Guys,

Ksor, Its exactly what I wanted  :thumbup: I have sent mkctools a email asking for a shipping price  :D

Thank you both again  :beer:
Rob

Title: Re: Tacho on a lathe
Post by: John Rudd on January 30, 2010, 12:39:43 PM

Rob,

Lester Caine does a kit ( no electronic assembly req'd) for a tacho designed by Tony Jeffree...

http://medw.co.uk/wiki/index.php?page=Tachometer


Worth a look dont ya think?  :beer: and he's in the UK..

Title: Re: Tacho on a lathe
Post by: slowcoach on January 31, 2010, 07:24:30 AM

Cheers John, I will look into that one  :thumbup:

Rob