johnm
06-05-2006, 04:23 PM
Folks -
Okay, next! Still don't have the material to cut the branding iron job, but had another one project come my way... Copper!
I have a prospect that wants us to cut out jewelry bangle blanks with engraved lettering. I am using some scrap sheet copper, I don't know what gauge it is, it's just shy of 1/32" thick.
Anyway, what would you recommend for cut feed speeds and a bit? I need to cut out an oval approximately 1" x 2" and I am going to * try * using the vacuum hold down for it. How much should my stepdown be on each pass? From my earlier post re machining aluminum and brass, .4 to .7 is what I was going with for feed speeds, and .1 .2 for z moves. I was going to use a 1/4" end mill for cutting and a 90 deg vee bit for the engraving. If any of this is a huge red light, please holler! I'd really like some idea of a prudent step-down rate.
As always, thanks in advance, at the time, in arrears....
John & Rose
Okay, next! Still don't have the material to cut the branding iron job, but had another one project come my way... Copper!
I have a prospect that wants us to cut out jewelry bangle blanks with engraved lettering. I am using some scrap sheet copper, I don't know what gauge it is, it's just shy of 1/32" thick.
Anyway, what would you recommend for cut feed speeds and a bit? I need to cut out an oval approximately 1" x 2" and I am going to * try * using the vacuum hold down for it. How much should my stepdown be on each pass? From my earlier post re machining aluminum and brass, .4 to .7 is what I was going with for feed speeds, and .1 .2 for z moves. I was going to use a 1/4" end mill for cutting and a 90 deg vee bit for the engraving. If any of this is a huge red light, please holler! I'd really like some idea of a prudent step-down rate.
As always, thanks in advance, at the time, in arrears....
John & Rose