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This is a film prop im replicating actually, but ive hit a snag. There are these crescent shaped reliefs of the finger tip joints I cant seem to replicate. They arent perfect half-circles that can be done with a rotary table, they taper a bit toward the round. Its almost like someone machined a gradual V, then rounded it off. I wouldn't be skeptical of this needlessly elaborate process if the visual effects guys weren't so huge into making things as simply and easily as possible. I need your help in uncovering the possible methods I may simply not know about. Thanks to all!
It's can sometimes be difficult to re-create a casted part with machining, but
From what I can determine from your photo, without having the actual part in my hands,
I believe the red circled section could be cut with a CNC Mill
The blue section looks like it was cut on a lathe
Rockcliff Machine Inc.
www.rockcliffmachine.com
Originally Posted by rockcliff
It's can sometimes be difficult to re-create a casted part with machining, but
From what I can determine from your photo, without having the actual part in my hands,
I believe the red circled section could be cut with a CNC Mill
The blue section looks like it was cut on a lathe
Yes, ive made this part exactly except for that relief (on the lathe and mill). I do have a bit of info on the original part and it is actually machined, rather than cast. Yep, im stuck
My experience making movie stuff has been that they like it good, fast, AND cheap...but they'll go with good and fast most of the time.
In front of the camera is one animal, behind the camera is a whole 'nuther deal.
Yes, for sure! This is the finger tip of a Terminator, machined rather intricately, but simply from what I can tell from the rest of the hand- certainly not CNC stuff. I just cant see why they would go through the effort of making a complex curve on an obscure area if it werent done as an afterthought since it was easy. They could have made it a perfect concentric cut and it would look almost the same. Mysterious
looks fairly straight forward to me. a end mill with a corner radius on a rotary table. it is an arc by the look of it for about 160 degrees, then carries on straight.
so youd rotate it on the rotary table, then move in a linear axis to complete it.
thats probably a terrible explanation haha. in the image the blue is linear axis motion, the red rotary table motion.
ihavenofish could have used the word tangent or tangential.
Jon
Sliding down the razor blade of life.
i could have, but big words scare me.
i could have, but big words scare me.
Sliding down the razor blade of life.
Get it close and file...
bob
Oh I totally follow what you're saying, its what ive tried. The results were fairly bad, not nearly as clean as the original. I should probably pick up a round needle file here pretty soon and keep chugging at it....I just felt certain I missed an easier way to pull this off.
CNC
i dont see any other better ways for manually cutting that curve. you need a nice precise rigid setup.
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