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Member postings for Roger Harvey

Here is a list of all the postings Roger Harvey has made in our forums. Click on a thread name to jump to the thread.

Thread: PIDDINGTON TOOLHOLDER
13/06/2018 13:15:41

Many thanks Ady1 the photographs of the Model Engineer pages is exactly what I have been looking for.

Roger

06/06/2018 19:30:24

Has anyone got the articles from Model Engineer by David Piddington describing making his extended toolholder for the Myford Dickson toolpost?

Thread: ELECTRONICS
05/10/2009 14:14:59
Hello All,
Back in Issue No.  147, Mike Crossfield wrote an article describing a low cost rev-counter. This used a disk with 60 slots to generate 60 pulses per revolution of the spindle.
Is there an electronic device, or a circuit using such a device, that would amplify/multiply the pulses generated by one similar opto switch once per revolution by 60 times. i.e one pulse per revolution increased to 60.
Regards
Wychwar
 
Thread: ELECTRONICS
05/10/2009 13:51:32
Hello All,
Back in issue No. 147 of MEW Mike Crossfield wrote an article describing a low cost rev-counter. He used a discs with 60 slots (or the 60 tooth Myford Super 7 bull wheel) to generate 60 pulses per revolution which directly read off as a frequency. Is there a device or a circuit incorporating such a device to allow one pick up ber revolution to be amplified exactly 60 times?
Regards,
Wychwar
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