Scanlab RTC 5 PC Interface Board Installation And Operation Manual page 555

Normal wait_for_encoder_mode
List Command
Function waits until the selected encoder counter has overstepped or understepped the specified
count for the first time.
Call
wait_for_encoder_mode( Value, EncoderNo, Mode )
Parameters
Value
EncoderNo
Mode
Comments • For usage of this command, see
• For Mode = 0, ensure that the size and sign of the parameter Value is appropriate for
the counting direction of the selected encoder (for external triggering, this corresponds
to the workpiece's direction of motion). If Value > 0, the command waits for overstep-
ping, otherwise for understepping. If Value is positive and already less than the current
encoder count, then the command waits for a complete traversal of the counter (like-
wise if Value is negative and larger than the current encoder count). At a 1 MHz counter
rate, this can take up to approx. 36 minutes!
• If Mode <> 0, then the command waits for overstepping/understepping of the Value
parameter independently of the current position and direction of motion.
• If EncoderNo > 1, then wait_for_encoder_mode will be replaced with a
(get_last_error
• If no encoder-based Processing-on-the-fly correction is active, then the command
merely creates a waiting period (without galvanometer scanner motion) that allows
implementation of an externally triggered synchronization (as an alternative to external
starts,
• The command is available even if the Processing-on-the-fly option is not enabled.
• For Mode = 0, the command is synonymous with wait_for_encoder.
• The command doesn't alter the laser control signals. If you want the laser off during
the wait, then this command must be preceded by some other command that switches
off the "laser active" laser control signals (e.g. a list_nop).
• The active Processing-on-the-fly mode determines whether the galvanometer scanners
remain stationary during the wait or move in accordance with encoder changes (see
page
® ®
RTC 4 RTC 5 new command
get_encoder, store_encoder, read_encoder, simulate_encoder, wait_for_encoder,
References
wait_for_encoder_in_range, park_position,
®
RTC 5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
Count as a signed 32-bit value; allowed range: [–2
Number of the to-be-used encoder counter as an unsigned 32-bit value,
allowed values:
= 0: Encoder counter Encoder0
= 1: Encoder counter Encoder1
signed 32-bit value:
= 0: waits for understepping/overstepping (position dependent)
> 0: waits for overstepping (position independent)
< 0: waits for understepping (position independent)
return code RTC5_PARAM_ERROR).
set_wait or if_cond, etc.).
188): They move with set_fly_2d, but otherwise remain stationary.
"Synchronization via Encoder Signals", page
park_return
31 31
... +(2 –1)]
215.
list_nop
555