Optical Centre Punch - #TMC2020

[MachineNZ]

Hi Everyone,
This is my entry for the #TMC2020 :

For those of you that don't know Emma Ritzen (Youtube Channel: Emmas Spareroom Machine Shop) is running a tool making competition on Youtube.
Type #TMC2020 into Youtube to watch videos from creators who have entered.

Regards
Kevin Campkin

[th62]

Interesting! I made one some time ago but couldn't get a convex shate good enough to magnify clearly so I just polished the end flat and scribed crosses top and bottom. To get the cross hairs as fine as possible i used a sharpened hacksaw blade. I also lit mine with an LED.

[MachineNZ]

Interesting! I made one some time ago but couldn't get a convex shate good enough to magnify clearly so I just polished the end flat and scribed crosses top and bottom. To get the cross hairs as fine as possible i used a sharpened hacksaw blade. I also lit mine with an LED.

Hi there, yes the lens has to be a particular shape thats why I researched online using one of the many Lens calculators.
Yours looks cool with the LED

[th62]

How did you get the curve, just by eye?

[Altair]

Thanks MachineNZ! We've added your Optical Center Punch to our Measuring and Marking category,
as well as to your builder page: MachineNZ's Homemade Tools. Your receipt:

Optical Center Punch by MachineNZ

tags: punch

[Altair]

Thanks th62! We've added your Optical Center Punch to our Measuring and Marking category,
as well as to your builder page: th62's Homemade Tools. Your receipt:

Optical Center Punch by th62

tags: punch, centering