Quote:
Originally posted by nicozeg
I know the conversion is ok. I mean .03 inches is too much slope, that's about 1/32, it should be more like .003"
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Oh, my bad. But still I belive it is .03. Especially on a mill that has any amount of hours on it. The more it is used the more slop it gets. I well kept up mill shouldn't loose to much but still it wears. My mill is about 1/64th right now and going fast.
Thats why I stopped using copper. The software is set to compensate. But that is mainly for strait cuts. Curved cuts is a whole different set of problems as it is putting pressure in more than one direction. it wouldn't be so bad if you were not trying to cut fins and channels in 1mm encraments, but trying to keep that many channels that precise is not an easy challenge. I know I couldn't do on my mill even if I used aluminum. Well a 1mm endmill needs to spin around 16,000 RPM anyway which mine only tops out at 3,000rpm.
This will take expensive mills that are very tight which are only going to come from very expensive shops.
Also if you go to a machine shop make sure you have a drawing that they can use to make the G code with or they will charge you around $500-$2000 for a drawing fee. And they will want to make at least 25-50+ at a time or they will not do it unless you got the bucks to cover their time which is usually $50-$200 an hour. It will take a good hour or two to get it setup just to run it. And of course they are going to add in a few hours of prep and clean up. So if you just want one done expect around $800+ if you have a usable drawing, unless of course you know someone in a good machine shop that is willing to try and do it for you.
You maybe lucky and find a shop that is low on orders and cut you a hell of a deal though.