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-   -   One for the machine shop engineers (https://www.the75andztclub.co.uk/forum/showthread.php?t=317030)

macafee2 30th December 2021 18:12
One for the machine shop engineers
 
Cant understand a word this chap says. I have seen similar some years ago but I still like this

https://www.youtube.com/watch?v=RF-B0ZqDBZE

macafee2

stevestrat 30th December 2021 18:18
Kinda lost interest trying to watch what he was doing and read subtitles at the same time.

COLVERT 30th December 2021 22:33
Quote:
Originally Posted by macafee2 (Post 2914383)
Cant understand a word this chap says. I have seen similar some years ago but I still like this

https://www.youtube.com/watch?v=RF-B0ZqDBZE

macafee2
Look again at about 10 minutes . The cutter is running backwards.---:shocked:

steve-45 31st December 2021 09:12
Quote:
Originally Posted by COLVERT (Post 2914417)
Look again at about 10 minutes . The cutter is running backwards.---:shocked:
Perhaps he is putting material back on !

macafee2 31st December 2021 09:33
Quote:
Originally Posted by COLVERT (Post 2914417)
Look again at about 10 minutes . The cutter is running backwards.---:shocked:
Twist drills look to run clockwise but the triangular bit runs anti clockwise

macafee2

BRG75 31st December 2021 10:00
I don't think that it is running backwards.

Look at it at start up, and then when it come to a halt. Both are running forwards (with respect to the cutting edge)

When at speed, it appears to run backwards, well known synch problem with rotating wheels etc, being filmed.


Easier to see this if you watch the chuck, rather than the milling bit.

Regards

Mike

roverbarmy 31st December 2021 10:28
Quote:
Originally Posted by COLVERT (Post 2914417)
Look again at about 10 minutes . The cutter is running backwards.---:shocked:
Also, never use flourescent light in a workshop! I tried to explain it to a H&S guy from the County Inspectorate but until he saw a stationary wheel that wasn't, he didn't understand it!!! :icon_rolleyes: We got new (non flourescent) lights soon after!

macafee2 31st December 2021 10:41
Quote:
Originally Posted by roverbarmy (Post 2914456)
Also, never use flourescent light in a workshop! I tried to explain it to a H&S guy from the County Inspectorate but until he saw a stationary wheel that wasn't, he didn't understand it!!! :icon_rolleyes: We got new (non flourescent) lights soon after!
Go on, explain, never heard that before. Never noticed an issue in my garage.

macafee2

COLVERT 31st December 2021 18:19
Quote:
Originally Posted by BRG75 (Post 2914453)
I don't think that it is running backwards.

Look at it at start up, and then when it come to a halt. Both are running forwards (with respect to the cutting edge)

When at speed, it appears to run backwards, well known synch problem with rotating wheels etc, being filmed.


Easier to see this if you watch the chuck, rather than the milling bit.

Regards

Mike
Very true and if the lights are florescent the cutter can appear stationary.

COLVERT 31st December 2021 18:24
Quote:
Originally Posted by macafee2 (Post 2914461)
Go on, explain, never heard that before. Never noticed an issue in my garage.

macafee2
It's a stroboscopic effect.---( As for ignition timing lamps for engines. )

If the strobe flickers at the same rate as a revolving object the object will appear to stop moving.---VERY dangerous.

Seeking that effect in your garage you just have to spin your missus around a tad faster to match 50 cycles of the mains supply.---:shocked:


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