Settle an argument,
Application hoist lifting a heavy load + 300-500kgs
If the hoist over travels substantial damage could be done, not dangerous just more $$$ issue and a loss of production time
System needs to have home sensors top and bottom for programming these are installed as proximity switches.
After these switches there is nothing to stop the hoist from travelling into a mechanical stop.
the argument
one side recommends having additional mechanical limit switches installed inline with the hoists linear slide after the proxy's as he is off the opinion that proximities are not reliable enough to act as limit switches, they have a sensing range of around 2-3 mm and the mechanical switch should be there as back up only.
The other side recommends that it is ok as is and to just let the drive fault out by driving into the mechanical stop and letting the VSD drive fault out on overcurrent.
probably not hard to know which side of the argument I am on, Interested to hear you guys thoughts.
Application hoist lifting a heavy load + 300-500kgs
If the hoist over travels substantial damage could be done, not dangerous just more $$$ issue and a loss of production time
System needs to have home sensors top and bottom for programming these are installed as proximity switches.
After these switches there is nothing to stop the hoist from travelling into a mechanical stop.
the argument
one side recommends having additional mechanical limit switches installed inline with the hoists linear slide after the proxy's as he is off the opinion that proximities are not reliable enough to act as limit switches, they have a sensing range of around 2-3 mm and the mechanical switch should be there as back up only.
The other side recommends that it is ok as is and to just let the drive fault out by driving into the mechanical stop and letting the VSD drive fault out on overcurrent.
probably not hard to know which side of the argument I am on, Interested to hear you guys thoughts.