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« on: June 27, 2013, 10:31:25 PM »
Mike,
Just so you know I wasn't doing cheap. I've built this machine from lots of surplus and some new parts. 4 THK GL20n linear bearing slides with 5mm balls screws and 18" travels, one is a spare. Table is a hand scraped 24" x 24" Cast iron surface plate with 5" ribs. 4-800 in/oz stepper motors with a common 1500 watt 68 volt power supply, and 4 Leadshine 7 amp drivers, one 8.5 amp driver. 80/20 style aluminum base frame with complete 3' x 5' enclosure, LED lights and sliding plexiglas doors. Two nema 4 steel electrical enclosures. All shielded Igus energy chain cables. It has everything properly fused and grounded. All wiring in place for an extruder stepper motor, heater and thermister, plus a 12" square heated bed to allow 3D printing. It has a DL06 20 input 16 output PLC with a 4 channel analog input card for I/O. There is an air filter regulator and 4 gang manifold with 4 way air valves installed, and a cooling fan for the electronics. I also have a mini lathe bed with headstock and tailstock and that I am driving the spindle with a large stepper to provide turning and 4th axis positioning. The mill spindle was a Sherline but is being converted an R8 spindle with treadmill motor and TTS tooling. The spindle can be rotated to make it a horizontal machine for long parts or deep pockets. I have tapped 144 holes in the table for holding down and I have two 4" CNC vices and two good size angle plates.
Don't ask me how much I've spent, my wife might find out! Oh yeah, I'm doing this with my 9 year old grandson. We did our first paying job last week, 200 plastic wheels with holes and pockets in them. He ran the machine one night. The next day when I got home from work he already had the PC fired up and the correct G-code program loaded to finish the job!