The drives on the transfer device are frequency-controlled.
A break control (safety device against fall) monitors the toothed belt for the
vertical movement.
For this the clamping belt unit is installed at the top of the vertical carriage with
springs.
The springs relax in case of a toothed belt breakage, thus operating an terminal
switch which linked with a spring--replacing cylinder activates a safety device
against fall.
Here a breakhead is driven out, which drives into a cam strip thus stopping the
vertical movement.
In case of a lack of compressed air, the safety apparatus is activated as well!