Electro Cam 5000 Series - Manual (Page 42)

5-1 Programming, Optional Features
Leading / Trailing Edge Speed Compensation: Option “-L”
FCN 0 Sc - Type of Speed Compensation
(units with “L” option only)
onE - Standard Speed Compensation: One value of
speed compensation is programmed for each output channel.
Both the leading and trailing edges of output pulses are
compensated by the same amount. Controls that do not
have the “L” option operate in this manner. A unique amount
of speed comp can be programmed for each output channel.
botH - Leading and Trailing Edge Speed Compensation:
A different amount of speed compensation can be pro-
grammed for the Leading and Trailing pulse edges of each
output channel. This allows proper compensation for output
devices with different turn on and turn off responses.
Selecting the Type of Speed Compensation
2nd
Press CHN key
until Sc is shown 3rd
Sc - Speed
comp
1st If FCN 0
not shown press:
FCN 0 ENT
Press PULSE key to select
between onE and botH
Present Speed comp
type shown
onE - Standard
botH - Lead/Trail edge
FCN 4 - Leading/Trailing Edge Speed
Compensation
(Setup or Master program enable must be active)
Speed Compensation is the ability of the control to
automatically advance an output's setpoints as the machine
speeds up, thus compensating for the response of the
device being controlled. Each output can be individually
compensated by a unique amount. This allows all output
devices to be properly compensated, even though their
responses may vary widely.
When the control is set for leading/trailing edge speed comp
(FCN 0, Sc=botH), two speed compensation values may be
programmed for each output channel - one for the leading
pulse edges (turn on), one for the trailing pulse edges (turn
off). The amount of speed compensation needed is
determined in the same manner used for standard speed
compensation, but two values will be needed for each
output channel being compensated.
Speed compensation is set in units of Degrees/1000 RPM,
regardless of the scale factor being used. If leading edge
and/or trailing edge responses of output device are known,
the amount of Speed Comp required can be calculated:
Speed Comp (Deg/1000 RPM) = 6 x response (in mSec)
EX: 20 mSec response; 6 x 20 = 120 (Deg/1000 RPM)
Program the output for the correct on and off setpoints at
zero speed and then program speed comp values for the
leading and trailing edges.
If the device response is not known, program output for the
correct on and off setpoints at zero machine speed. Program
the output with estimated speed comp values based on six
times the estimated response in mSec (mSec = .001 Sec).
Run machine at a typical speed and adjust leading and
trailing edge speed comp values until output is properly
synchronized to the machine.
Present Trailing Edge
Speed Comp value
shown
2nd
3rd
1st If FCN 4
not shown press:
FCN 4 ENT
Present Output
Channel
Selected
Press CHN key
to select output #
4th
Present Leading Edge
Speed Comp value
shown
2nd
3rd Press ON key to select on
(leading) edge (ON led lit)
Press number keys followed by
ENT to change Leading Edge
Speed Comp value
1st If FCN 4
not shown press:
FCN 4 ENT
Present Output
Channel
Selected
Press CHN key
to select output #
4th
Programming the Leading Edge Speed Comp Value
Programming the Trailing Edge Speed Comp Value
Press OFF key to select off
(trailing) edge (OFF led lit)
Press number keys followed by
ENT to change Trailing Edge
Speed Comp value
Note: Once programmed in a channel, this function will be present in that channel in all programs.