Using a metal cutting burr with a router...?

[noyloj]

Ok seeing that you are not so abrasive.

I cut a slot in my table about 4mm deep


and the table twisted by about 2mm with the stress being relieved then I had to take it to engineering place to have it trued up and the top skimmed.

So beware as I did not expect that to happen.

Perhaps this resource could be useful...

STRESS RELIEF OF GRAY CAST IRON


dtic.mil/cgi-bin/GetTRDoc?AD=AD0620556 · PDF file


I don't know how to insert links so go easy on me....

[mekanik]

http://www.dtic.mil/dtic/tr/fulltext/u2/620556.pdf

[Boyan Silyavski]

That's just the kind of advice I need! I don't know why you bothered to write anything! It is a complete failure of logic to imagine that just because I want to use Nema34 motors that I got cheap that I somehow am incapable of hearing anything else. It's depressing.

Obviously he is warning you and again giving you a free advice. But it seems you are from the people that think that if 34 is bigger than 23 is better, stronger and faster. Are you by chance an American?

If you ask in forums then listen to the experience. If you know better, then why you are asking?

[komatias]

Machining the castings is somewhat irreversible since the parts are hand finished to fit. You can just buy a saddle but you will need to get it reground and fitted which, unless you have all the equipment to do, is rather expensive.

Most cheap chinese castings are not stress releived, as Jazz has pointed out. That means if you take a cut on the parts, you are heading for trouble fast. I know....been there and had to learn to scrape.

That is why I am spending on custom parts, so people will not need to machine anything.

Now can we all just make up and get on with CNC talk?

[noyloj]

If you ask in forums then listen to the experience. If you know better, then why you are asking?

I didn't ask in the forums. AND I never said I knew better! AND I'm not American!