FlowJet AWJ help

[boom]

Hello guys,

I realize this is more of a DIY forum, but maybe someone has experience at operating FlowJets.

I cut a part on a Flow and I noticed a small blemish. The lead in lead outs are visible on the part and actually cause my small holes to become slightly oval. Is this a common trait to most AWJ? Is there an adjustment I overlooked?

I reduced the lead in-outs to a size smaller than the holes. I also specified the side of cut correctly and even though the picture suggests otherwise, the two piece are very close in overall dimension. The top being the stamped piece I tried to reproduce, albeit with a bit of weight savings.

If anyone knows of a more appropriate forum for AWJ users please share as well.

Thanks in advance.

[InspirationTool]

It sounds like a orifice or abrasive clump problem, but I'm not a waterjet operator, I just buy alot of waterjet parts. Having the jet take an extra bite is a common problem, but I think it can be reduced with high quality abrasive, maintenece, and maybe some programming changes.

The place to ask is over at the http://waterjets.org/ yahoo group:

http://groups.yahoo.com/group/waterjets/

-Jeff

[Ron22]

First as Jeff said http://groupyahoo.com/group/waterjets/ is the best place to look.
Personally I am not a fan of Flows software to run their machines. I think it limits the operator too much. I would prefer G& M code any day.
For your problem
Is the problem worse on the bottom or only noticeable on the bottom?
Do you have an option not to have a lead out and still use a lead in?
Do you have different options for lead in/out (like arc)?

[DEW]

Looks like the part might be moving on you while your cutting.
Regards,
Doug

[Hogpaw]

Can you do a static pierce or a straight lead in? Static pierce should only leave a small dimple and the straight lead in may leave a smaller dimple or no mark at all.

[DEW]

You can do both just depends on what result you want. Try recutting that piece clamped down solid to the table and then compare the two. It's an easy way to find out what your problem is.
Regards,
Doug