Hey guys, I was wondering a couple things. I'm going to use a couple actuators in my robot. This is what they have to do, extend to their greatest length (with no real resistance, or very very little resistance), then pull back tight against something. I'm guessing I need pull actuators (and I really don't feel like springing for the combination push/pull ones.) Will the pull ones be able to push their bar to the end with a little resistance? It'd be dumb if they couldn't move themselves both ways. Plus aren't they just motors connected to threaded rods?
Secondly what's the difference between continuous vs. intermittent actuators? From what I've read intermittent ones are generally used when the actuator has a long break after moving. Meaning it'll move, then wait a while, then move again. Continuous can move as (often)much as they want? Then why in some cases are continuous cheaper than intermittent? (According to the McMaster-Carr catalog)
Thanks in advance!