Counter balance

[sml2010]

Hi to all


Can you please help me for calculate and select Pneumatic Counter balance for Z axis in cnc machine?



Thank you

[RICHARD ZASTROW]

By pneumatic counterbalance I assume you mean an air cylinder.

load to be countered= L 100 lb. ex.
Area of piston in cyl.= A 2" dia. piston (radius squared times pi) = 3.14 sq.in. ex.
Pressure of air in cyl.= P L (100 lb.) divided by A (3.14 sq.in.) = 31.8 psi air pressure ex.

Dick Z

[Al_The_Man]

You may also need a constant pressure regulator, as you most likely want to keep the pressure constant on extend or retract?
Al.

[fmederos]

Hi,
You may also consider using a helical (wind-up) type of spring to get an almost-constant force. We have done this a couple of times and it worked ok. Advantage is you don't need a brake for the case of loosing air-pressure.

Regards,

[sml2010]

Hi

Thank you very much dear fmederos, Al_The_Man and richard