Charmilles Wire

[bamavick]

Can anybody that uses Charmilles wire machines tell me what kind of Tec file ( # of cuts and what settings) they use on Revision parts. We just started doing revisions on them and I am having problems getting a part out to size when we don't bury the wire. (Ex. We are cutting H13 hardened steel taking off .015" using .010" zinc coated wire.)

[Del.]

most if not all wire machines underburn when the wire is not buried deep enough. I would just take the last skim pass you use and repeat it with the same settings except up your offsets a tenth or two.

[bamavick]

Thanks... Thats actually good to hear. I thought I was just going crazy when I would program it to take off a certain amount and it would be way under. Seems like taking (baby) cuts is the most precise way when you can't bury the wire.

[Del.]

The biggest problem is that you lose your flushing. I use to always try to make sure i had whatever the diameter of the inside of the flush cups were per side.

[Jerry_P]

Charmilles have an E4 that you can use when cutting like you are just replace the E2 with an E4. In some cases you might want to increase the wire speed a couple of notches. there factory setting have it running pretty slow and that can cause some problems

[Oppiz]

One thing you didn't mention was the height of your cut. I have parts that I often skim off .01 to .015. The height of my cut is 4". I ran into issue of them bellying and the final pass would go to contact. What I did to solve the problem was I dropped my comp on the 1st cut a tenth or two and backed off on my flush. The high flush would cause my wire to deflect on the roughing pass. I run Mitsubishi EDM's.