> From: Roland Jollivet [mailto:roland.jolli...@gmail.com] > To throw in my two cents; > > I build a lot of prototypes, and get my parts laser cut, but a CNC turret > punch would be a great have. > > I've toyed with the idea a lot and came up with this strategy; > - machine designed to up to 3mm sheet metal only, maybe half a full sheet > (1.2 x 1.2m) > - build a high speed nibbler rather than a turret punch > - the machine has two fixed tools, a 2x2 square punch, and a 2mm round punch > - high speed nibbling will allow almost any profile to be generated with > these two tools > - the machine would be a fixed gantry style, 2.4m wide, and the gantry beam > is simply loaded up with extra mass to prevent oscillations > > The mechanism would be hydraulically driven, with the pumps on the floor, > and tubing up to the two cylinders > The 'pump' is an eccentric piston, and free runs all the time, pushing and > pulling oil into the tank. The volume is low > When a punch operation is required, a pin will shoot into the oil line, > redirecting the flow to one of the cylinders > The pin will stay in position if continuous nibbling is required, or can be > timed at intervals according to the sheet position > (yes, you don't want to side load the tool too much) > > While the explanation is laborious, I think it's a simple setup to make.. > > Roland
I think I understand that explanation. However, for me the cost would be easily $80K. Why so much? The cost of the bigger shop to fit something that large. But I agree that only a few punch sizes are required. John _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
