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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: SHAPER ACCESSORIES
29/10/2019 13:16:02

Is there a design available anywhere for a hacksaw attachment to a shaper?

Regard ll,

Wychwar

Thread: M & W DR961 Micrometer
13/10/2019 16:51:10

Can anyone help?

I have a Moore and Wright DR961 0 – 1” micrometer.

This is a direct reading mechanical as opposed to electronic mechanism. It reads to 0.0002” with the thou’s showing as numbers in the viewing window in the thimble.

This is a favourite micrometer of mine due to the direct reading so I was upset when it fell out of my overall coat pocket when I picked up the coat to put it on. The micrometer fell onto a concrete floor with the result that the thimble sprung off the knurled operating knob. After a lot of attempts I have managed to relocate the thimble back in the correct location. The direct reading figures and graduations are correctly located within the transparent window in the thimble. Unfortunately when the thimble with the attached spindle is screwed back into the body of the micrometer and the thimble located at either the “0” or the “10” graduation on the body the spindle is exactly 0.030” clear of the anvil or 1.030” (using a 1” test disc from my M & W 0 – 4” micrometer set) at “0” and “10” respectively. After weeks of trying I cannot find what is wrong. The thread is 50 TPI with one revolution moving the spindle 0.020” . It looks to me that the spindle need extracting 0.030” from the knurled operating knob. But how? Just short of where the spindle ends and becomes the threaded part of the component there are two black areas. One about 1/16” wide and the other 1/32”. If this should be a join where the spindle is threaded to the operating thread it should be possible to add shims to extend the length by 0.030”. But again how?

I have contacted Bowers Group who have Moore and Wright as one of their companies. A Mr Alex Glover Repairs & Calibration Manager (in-house lace w:st="on">UKlace>) e-mailed me to say “Unfortunately we don’t have literature for these mics, due to their age and update of our electronic drawings / system. I’m sorry, I’m unable to help in this instance”.

If anyone on the forum can help I would be extremely grateful

Regards,

Wychwar

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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