Scanlab RTC 4 Installation And Operation Manual page 18

Set Position
(Microvectors)
Lag
Jump
Command
Scan head control timing during a jump command with a jump
delay. The laser is not turned on.
Minimum Jump Delay,
set by set_delay_mode
0
Variable Jump Delay
Top: length l of the jump vector
Bottom: Variation of the jump delay
®
RTC 4 PC Interface Board
Rev. 1.3 e
4 Principle Of Operation
Variable Jump Delay
During a jump vector, the laser focus (output
position) usually moves with a constant linear
velocity, the jump speed. Since the jump speed is the
same for each jump vector, a constant jump delay is
required for settling of the mirrors.
However, if a jump vector is very short, the scanners
might not reach the full jump speed during the jump
because of the inertia of the mirrors. In this case, a
Jump
shorter jump delay might be sufficient for settling.
Delay
To make use of this, the RTC
delay mode. In this mode, the jump delay for short
jump vectors will be reduced in time, as shown in
figure 6 on page
Real
jump vector of zero length) and the jump length limit
Position
are set by the user with the command
set_delay_mode (see page
When using the variable jump delay mode, total
marking time can be reduced, especially in
applications involving many short jumps.
Time
Notes
5
To turn off the variable jump delay mode, simply
set the parameter JumpLengthLimit to zero.
Jump Length Limit,
set by set_delay_mode
®
4 offers a variable jump
18. The minimum jump delay (for a
104).
Constant Jump Delay,
set by set_scanner_delays
Jump Length l
6
18