Re: [CAD_CAM_EDM_DRO] Air Cylinder Press

At 07:58 AM 7/30/2000 -0800, you wrote:

>Jim Register wrote:
>>
>> At 02:40 PM 7/29/2000 EDT, Mario wrote:
>> >Anyone has any plans for a small table top air cylinder press?
>>
>> You really do not want to use air to power a press. Imagine pressing a bearing off a shaft. Once the parts separate, there is nothing to restrain the air cylinder from flying to its fully extended position - except maybe fingers and toes. The impact at the end of travel will not be good for things either.
>
>If you are using a double acting cylinder, there is the air on the other
>side of the piston to slow things down.
>
>John Grant

Yep, and if you have hydraulic fluid on that side, you could control the extension speed with a needle valve. Store the fluid in an accumulator at moderately low pressure, and you have a built-in retract mechanism. Kinda does away with my arguments against using air power, but it probably has its own problems.

Jim