FlexLink Spiral Elevator - Manual (Page 44)

Mounting, installation, adjustment
Page 38 of 68 5478EN-3
5.5.2 Controls
The table below gives some general guidelines with regard to the control
system used to operate the Spiral Elevator. .
No. Component Setting Remark
1. Frequency control
(where fitted)
15% The speed difference of the feeding conveyor to the
Spiral Elevator or the Spiral Elevator to the receiving
conveyor should generally be below the setting value.
This is to avoid product twisting at the transfers and
excessive slipping of the product on the conveyor or
Spiral Elevator chain.
2. Emergency stop switch Direct The Spiral Elevator should be protected via an
emergency stop circuit, such that if the relevant
emergency stop button (or other) is activated, all power
is removed from the Spiral Elevator gear motor,
following which the Spiral Elevator may overrun a little
(depending upon speed).
The full details of the emergency stop circuit and
procedure must be evaluated by the persons
responsible for designing the control system.
3.a. Start / Stop via 'Direct on
Line' control <3 sec. The conveyor will start almost immediately and will stop
and overrun a little (depending upon speed).
3.b. Start / Stop via
Frequency controller
(Inverter) 2 sec. For normal conditions the ramp-up and ramp-down
time set in the frequency controller should be set to 2
seconds.
4. Height / width detector Direct Where over height or over width detection is
incorporated, the stopping of the conveyor should be
activated immediately with the stopping times
suggested in the above items.