KTP
04-28-2008, 02:18 PM
Hi guys,
I am trying to throw together a small precison mill that I can loan out to friends. I want to use only parts I already have, because I need to reduce the volume of junk in the house/garage. I have made some preliminary cad drawings and will be using three KR-33 series linear stages (the cute little ones with a ballscrew and carriage in a steel frame, with nema 23 mount) supplemented by linear rails and carriages in all three axis. I happen to have just enough rails and carriages except that I need one more IKO LWHS25 carriage for the x axis. The complete part # is LWHS25 SL on the carriage and LWH25 SL on the rail. Anyone have one to sell or trade?
I will post pictures of the build as I go...about to start machining the baseplate today or tommorow. I scored a huge slab of mic6 ground plate at boeing a few years ago (36 inch by 44 inch, 1 inch thick) so that should mostly do me for metal. Total travel will be 10 inches Y, 14 inches X, and 12 inches Z. I plan on using nema23 brushless servos by API motion since I have 4 of them already. They are rated at 1.6Nm stall torque, so quite peppy. The machine should do around 500 to 1000 IPM rapids, maybe a bit more.
I am thinking of using a Taig headstock and a 1kW brushless motor for the spindle. I have a motor that can do 5000 rpm, and gearing up 2 to 1, should put me at the 10000 rpm max for the taig. Plus, since the spindle motor will be under servo amp/computer control, it can do interesting things.
I am going to machine a thick, wide dovetail into the baseplate so the z-axis can be quickly removed and attached while maintaining alignment. This will allow me to split the machine up into two fairly heavy, but moveable parts when loaning out to friends or taking on the road. Hopefully I can keep each piece under 150 lbs or so.
I am trying to throw together a small precison mill that I can loan out to friends. I want to use only parts I already have, because I need to reduce the volume of junk in the house/garage. I have made some preliminary cad drawings and will be using three KR-33 series linear stages (the cute little ones with a ballscrew and carriage in a steel frame, with nema 23 mount) supplemented by linear rails and carriages in all three axis. I happen to have just enough rails and carriages except that I need one more IKO LWHS25 carriage for the x axis. The complete part # is LWHS25 SL on the carriage and LWH25 SL on the rail. Anyone have one to sell or trade?
I will post pictures of the build as I go...about to start machining the baseplate today or tommorow. I scored a huge slab of mic6 ground plate at boeing a few years ago (36 inch by 44 inch, 1 inch thick) so that should mostly do me for metal. Total travel will be 10 inches Y, 14 inches X, and 12 inches Z. I plan on using nema23 brushless servos by API motion since I have 4 of them already. They are rated at 1.6Nm stall torque, so quite peppy. The machine should do around 500 to 1000 IPM rapids, maybe a bit more.
I am thinking of using a Taig headstock and a 1kW brushless motor for the spindle. I have a motor that can do 5000 rpm, and gearing up 2 to 1, should put me at the 10000 rpm max for the taig. Plus, since the spindle motor will be under servo amp/computer control, it can do interesting things.
I am going to machine a thick, wide dovetail into the baseplate so the z-axis can be quickly removed and attached while maintaining alignment. This will allow me to split the machine up into two fairly heavy, but moveable parts when loaning out to friends or taking on the road. Hopefully I can keep each piece under 150 lbs or so.