I am having problems with my Flame cutter, and need some advice.
For the most part everything is working good, just not great. The reason I need it to run great is I am going to buy a Hypertherm 85 and hook to it.
The problem is only on the x axis, and this is a gantry style-- so there are two drive servos.
The problem is there is a shutter when the x axis moves in either direction. This only happens when the axis moves from a complete stop and accelerates.
I can move the x axis in the ++ direction, let it stop, then move it in the ++ direction again and the shutter happens again.
I can move it in the -- direction, let it stop, then move it in the -- direction and again it shutters.
I have looked everywhere for something loose, and can't find a thing.
I have tuned the servos, and Mach until I am blue in the face. Still shutters.
I am using Thomson duratru gearboxes that are 5 to 1, with a 2.5 diameter pinion on a gear rack.
I am also using 1125 in. oz dc brushed motors.
My gantry weights about 300-400 pounds, but the force to pull it is less then 10 pounds. I used a pull guage to measure this.
is it posible that the weight of my gantry is overpowering the servo due to inertia?
I am thinking a larger gearbox would help? Any suggestions? I have a price quote for 15 to 1 , and 25 to 1 gearboxes
I use this table for structural steel fabrication, so I don't need high rapid speeds, but I dont want to have it crawl either.
Give me some suggestions PLEASE!!!!