Re: Stroboscopic effects on lathe

On 23 Jan, 00:25, Boo <reply_to_group_not_me@xxxxxxxxxxxxxxxxxxx>
wrote:
door.   I've tried winding the lathe spindle speed up and down from 40 -
2000 rpm and I can't get this to happen,  almost at around 300 rpm,  
certainly not at 50 rpm.

100Hz is 6000 rpm so a 3 jaw chuck will sync at 2000 (or 4000 or 6000) rpm and a
4 jaw at 1500 (or 3000, 4500 or 6000).

--
Boo

Some years ago we bought a large industrial strobe unit with remote
lamp to shine onto a grinding wheel doing 3,000 rpm to 'stop' it so
the operator could see better to freehand grind some small drills.
It worked very well. Later we bought a Christian drill grinder and the
strobe was redundant.

I 'obtained ' it with the idea of shining it down inside some skeletal
housings on the lathe with loads if internal fins to 'stop the housing
so i could see better to pick up an existing feature and make it
deeper. At 15 " which is as close as I could get it it hardly worked.

I have tried many times with VFD controlled equipment to get a chuck
to stop under florry essence lighting but have never managed it.

In theory it should work but I personally have never met anyone who
has experienced this phenomenon and tend to regard it as an unproven
old wives tale.

JS.
.

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