Re: Superfly Crash...and recovery
Originally Posted by
sansbury
FWIW, while I like mine, I've had a hard time using it for what I originally got it for, which was milling off leftover stock from the backside of parts after flipping them. If you're taking any real DOC, it applies a LOT of force to the part, so it needs to be held really, really well to prevent it from lifting the part. I've had setups that were fine for moderately aggressive milling with a 1/2" EM that the Superfly yanked the part right out of. Would probably be fine with soft jaws, but I'm doing mostly prototyping so I try to get away with as little part-specifc workholding as possible.
Hah! This is true. The only part launch I've had came doing exactly that with 2" 45* facemill. I had a row of like 10 small parts on a stock base that I needed to mill the base away from. Everything was great until the final pass. Once the stock disconnected from the first part and it was now a long thing springboard, it bounced around, flipped up into the cutters and ripped the remaining parts out of the vice and into the wall. Thankfully it went to the back wall because of cutting direction. That moment sobered me up quite a bit too. It hit that wall with some force. I've found thus far that unless my vise can get a really solid grip on the finished part it's dangerous to try to facemill off that stock base. It also seems too that a significant DOC is better, That final bit of stock is far less flexible up if its .050 or 0.060 deep or better.
CNC: Making incorrect parts and breaking stuff, faster and with greater precision.