ok, first attempt using sketchup 8

[irving2008]

what size rsj were you planning to use and how long?

[deannos]

irving2008;33697]what size rsj were you planning to use and how long?

On the gantry the rsj is 178mm x102mm x19mm and is 1720mm long

[deannos]

Ok, now we are talking about the weight issue and moving the mass around and me still a complete novice at this. My question is would the steppers i already have be ok for the job. They are nema 23, 3nm (M60STH88-3008DF) and the drivers are MSD542 with a 48v power supply. I'm thinking that i would just have to change the drivers and get a 70v power supply