Originally Posted by
crtroyer
Greetings,
I am currently in the planning phase of retrofitting my 1989 Lagunmatic 310 control.
I recently purchased this machine from someone who had bought it from an auction, running at the time of the auction, and then stored in a garage for two years. It was well cared for in storage, and after the usual heartaches and $$ to move and set up and clean, the DynaPath20 control worked long enough for me to learn enough about it to really like it. But an unclearable E-Stop condition has convinced me to upgrade from the 26 year old control hardware. I'm grateful that the control worked long enough to demonstrate the mechanical soundness of the machine, as now I know that the machine is worth some investment of time and money.
My current plan is to use LinuxCNC running on a TBD desktop computer ( on my way to the computer store to do some latency testing today), with a Mesa 6I25, connected to a 7I77 with the 7I77ISOL (there's a lot of TIG and stick welding in the shop, and the 7I77ISOL seems like a sensible precaution.) As I understand it, the 7I77 card will control a 7I29 H-Bridge to provide the power to the Baldor brushed DC servos. The X and Y axes are Baldor MTE-4090-FL-5B servos, and the Z axis is an MTE-4070-FL-7B. The rotary encoders are BEI-Duncan E206-500-1 units, and seem to be working just fine.
Currently the only issues I see with this plan are the current unavailability of the 7I29 (out of stock on 5/16/15), the time required, and my general ignorance of electrical engineering. I'm a long time Linux user, so the command line and .ini files don't frighten me.
Any and all constructive input will be cheerfully accepted.
Thanks, Cyprian.