Control of bridge crane

1. the heavy objects should move along the top, bottom, left, right, front and back directions and move simultaneously in the three-dimensional direction. In addition to the downward movement, terminals in the other five directions should set terminal protection.

2., there is a reliable brake device, even in the case of power failure, the weight will not fall due to self weight.

3. should have a larger speed range, when starting from the stationary state, should start from the lowest speed gradually accelerated, acceleration can not be too large.

4. in order to prevent the possibility of overloading or speeding may occur, there should be short-term overload protection measures. Overcurrent relay is generally used as the overload protection of the circuit.

5., the pressure loss protection link.

6., there must be safety measures.