[Kiwi]

It was the intermediate point I was referring to.
I would assume the start and end points would be shown on the drawing.

[Motherlode97]

Maybe stated a different way... "An arc which passes through any three points". Yes any point which lies along the path of the arc would work. The start or end point would not define an unambiguous arc. I know. Just pick a point which is easy to define.

ML97

[julio_gyn]

now that make sense to me, I will try this when the jig is ready for machining

thanks,

julio

[julio_gyn]

well, I had enough problems with hurco for that job, i spent 1 day and nothing... then I moved the job to another machine (DAH-LIH with FANUC) and in 5 hours i had my samples, perfect, rsrsrsr... the problem with hurco is, if I need to ajust something I have to go to the computer and change, then I have the new center for the arc, this is out of question, the job is 2 jigs with blades, I have to machine the top (2 arcs) and then in a second jig mill the land (2 more arcs) inclinated 30 deg... the material is not perfect flat, so, when is more warped I have to increase or decrease de hights... but I'm running another job on the machine, simple blades, 15 deg chuck no arcs, just 1 line... there is something good on that machine, the amount of coolant delivered....

[Motherlode97]

I understand. Unless you have the optional 3-D mold software you have to calculate the points & center manually. The Option runs $3k if memory serves. I might still have one somewhere if you're interested.

ML

[julio_gyn]

maybe sometime I will try small tests.. but for now I will run this kind of job in fanuc or mazak controls, the nc is more eficient for fast programs and ajusts... we have 4 disks, one is the 3d mold, I don't remember the last 3

[Motherlode97]

When you're ready let us know. The 3D option is pretty easy and very powerful. It's not for all 3D stuff but can do some very amazing feats.

ML

[julio_gyn]

ok, soon as I start another trickie job on that machine I came back...

[Rally]

3D Arc will work fine for this!! Ron Meyer is absolutely correct.