Re: Stroboscopic effects on lathe
- From: Richard Shute <sharkface.pilot@xxxxxxxxxxxxxx>
- Date: Fri, 23 Jan 2009 09:59:21 +0000
On Thu, 22 Jan 2009 16:42:55 -0800 (PST), John S
On 23 Jan, 00:25, Boo <reply_to_group_not_me@xxxxxxxxxxxxxxxxxxx>
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).
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.
The most pronounced effect I have seen is a very blurred slight
'banding' or 'shadowing' of the surface, but the suggestion that the
chuck had 'stopped' is fantasy.
Just a week ago I put some white sticky tape stripe across the end of
a (1500 RPM) motor shaft to check it was running at the proper speed.
We were just about able to distinguish a fuzzy cross of less dimness.
This was a background no natural light at all (10 PM) and all light
from florries. It served out purpose, but in no way did the shaft
- Prev by Date: Re: 6mm inline coupling and shaft: equal to 1/4" imperial?
- Next by Date: Re: Stroboscopic effects on lathe
- Previous by thread: Re: Stroboscopic effects on lathe
- Next by thread: Re: Stroboscopic effects on lathe