My gut feeling is that the machine may be the problem. Had something similar occur on a DMG 5 axis once that "looked" like chatter and workholding, but ended up being a B encoder.

There are a few ways to smooth the motion in the programme, can you share the file?

Bruce

A little of both. As an example I have a "general steel" library that has cutting parameters for each tool that are at the bottom of the manufacturers recomendations for carbon steels as default. I then alter to suit condition and actual material. This way if I forget to check my speeds and feed the worst that happens is a longer cycle time, not a smash. I have other libraries for Ally and plastic, etc, etc.

Bruce

Personally I never use MC's SF calulation. I work out what works best fo a tool and save to a separate library.

Bruce

Nice.

If I were you I would stop now and not spend any more time on it until the customer coughs up this info.

Fiddle with MC until you get how multi start works, but cut nothing until you know.

Bruce

You will need to know more. What is the thread form and class? UN or Whitworth?

If you have the mating part it might help this time, but thread standards were developed for a reason. See if the customer knows more.

HTH

Bruce

I like the helido and have one of the new style feedmills, but I think I will just leave these faces un-machined. I was only really doing it to save on balancing further down the track, but if it takes half a day to save a couple of hundred $$ it isn't worth it.

Might get myself prepared next time with some ceramics or some other idea that comes to mind between now and the next batch.

Bruce

Ahoy!

I have a job from cast H7A Stainless that has a very hard outer skin.

Tried being conservative with standard Iscar HOF face mill, but am blowing up too many inserts.

Iscar on their way in to have a look, but thought I would ask if anyone has a better method. This part may be on the boundary of using ceramics????

Bruce

Garr VRX area available with or without corner rad and perform really well.

Bruce

Sounds like a good job. About 12 months ago, before opening my own shop, I was considering a move to the US for a couple of years.

Some days I wish I had

Bruce

Received.

Toby,

Having trouble with home email. Can you send it to:

newbrendaleshed :at: live :dot: com

thanks

Bruce

Depending on what "shadows" there are in the part, then yes it can be done. Flick me an email with the model and I will have a look.

Bruce

Have a file you could share?

Bugger.

Did anyone EVER make drill that long with that angle?

Bruce

I should have said Flex Aggregate.

http://www.emastercam.com/cgi-bin/ultimate...t=029860#000000

Bruce

The Garr ones are carbide, just not through coolant.

Bruce

I had the same question a while back. There would need to be a post mod to add the aggregate info. Inhouse would probably be the best bet.

Bruce

Ahoy!,

Looking for any advice on the difference betweent the two from a machining point of view. Looking at the chemical comp it looks both harder and more abrasive than 316?????

Bruce

I do know of 118 degree catalogue drills. 1200 and 1200H series from Garr. Not TSC though.

Bruce

Send them pages from the tooling catalogues and ask them to point out the drills that are 120.

We had the same thing with JSF stuff. You could 90% tell that the catia jockeys were either old school types bootstrapped into the software, or noobs straight out of uni with no real depth of manufacturing experience. Either way some of the stuff that made it into a model...

Almost a stereotypical complaint, but I don't think I am too far off.

Do you have any contact with that projects programme co-ordinator? Might be the only way to get a systemic change in the design office???

Bruce

Hmmm. DMG are great so long as the machine isn't in a hot humid environment. That was my experience at a previous employer. Haven't used a Hermle, but I can say that if you get a TNC control you won't be disapointed. I have seen a variaxis 630 against a DMU-50e and from an operators point of view I would personally prefer the DMG than the mazak. Programming either in MC is no different really.

My AU$0.032c

Bruce

118 is old school jobber tooling.

Best thing you could have done David was act dumb and say nothing. Now they have an excuse to add an ispection process to all your parts. But hey! It's all tax dollars paying for it in the end

What sort of feature is it Dave? Hopefully not a tapped hole!

Bruce

Looks like it is a ladder problem in the control. We have started using "normal" fanuc tapping cycles rather than the i-guide ones and apparently the machine wasn't setup to use them properly.

Bruce

I occasionally draw it up, but never ever use "undefined". Why are some of you using it?

Bruce