But the stepper i am using (mercury motor SM-42BYG011-25) doesnt have enough power around high speeds. It just stalls.
Anyone got any other suggestions?
Quote from: Marcoco on Nov 16, 2012, 06:08 pmAnyone got any other suggestions?You haven't explained what sort of travel, positional accuracy or speed you need to achieve, or whether you have any packaging or power constraints. With a hundred and fifty of these things to make and operate, it's worth putting the thought in up front to get the cheapest and most effective solution available.
The accuracy needs to be quite precise. We need to know the position of the bolt at all time.
Quote from: Marcoco on Nov 19, 2012, 11:13 amThe accuracy needs to be quite precise. We need to know the position of the bolt at all time.Does that mean you need the position to the nearest inch, or the nearest thousandth of an inch?Is that 3Kg per actuator, or shared across the whole set?
Lifting 3 kilos 50 cm in 0.5 seconds requires a lot of power.
What about using a funicular mechanism to reduce the weight. Then the major problem will be inertia.
Quote from: Riva on Nov 19, 2012, 03:02 pmWhat about using a funicular mechanism to reduce the weight. Then the major problem will be inertia.I may be wrong, but I have got the impression that the 3Kgs could be in either direction and wasn't simply a static load. I agree, if it's a static load then a simple counterbalance system could be used to reduce the power requirements (at the expense of increased inertia).
The reason we chose this kind of solution is because there is going to be a elastic material pushing down or pulling up the sled depending on the sled position.