Speed Follow - DFE SteadyWeb Instruction Manual

3. Actuation by machine speed.
This requires an optional DC Tachometer card or Pulse Tachometer card to provide a
machine speed signal. Calibrate the card as described in Section 6 before proceeding with
Soft Start set-up.
a) Set the SW104 switches as follows:
b) Set the SS OUTPUT pot.(RT107) for the output you want while in Soft Start. The range is about
0 to 100% of maximum output. Turn the pot. CW to increase output. Avoid setting the output
higher than the operating tension. It is best to set it low, but high enough to produce enough
tension to exceed the trip point tension or the controller may not be able to get out of Soft Start.
c) Set the SS LINE TRIP pot. (RT111) to the machine speed at which you want to actuate Soft
Start. The range is about 0 to 100% of maximum line speed. Turn the pot. CW to increase the
actuation speed. Set the pot. to about 5%. Do NOT leave it at 0 or Soft Start will be active all
the time.
d) Set the SS LINE DLY pot. (RT116) for a short time delay before Soft Start actuates. This
eliminates nuisance actuation if machine speed hovers around the trip point. The range is about
0 to 3 seconds. Turn the pot. CW to increase the delay. There is no delay when leaving the
Soft Start mode.
e) Set the SS TEN TRIP pot. fully CCW to avoid interference with the SS LINE TRIP pot.
5.19 SPEED FOLLOW (See Page 5 for description, Figure 16 for switch)
The SW101 switches must be set to indicate the use or nonuse of the Speed Follow function. Set the
switches as in the following table:
Speed Follow function OFF
Speed Follow function ON
Nip roll speed signal OFF
Nip roll speed signal ON
SW104
1 - Open
2 - NA
3 - NA
4 - NA
SW101 SWITCH
1 2
NA NA
NA NA
NA NA
NA NA
NA = Not Applicable
33
3 4
NA Open
NA Closed
Open NA
Closed NA