8 Initial Operation
Since the HALscan scanheads do not have a nameable startup-procedure, putting them into operation consists
of a few steps only:
1. power up HALscan and if necessary the connected scanner controller card
2. wait a few seconds until scanner is initialised
3. start sending data from the scanner controller card to the HALscan scanhead
For security reasons it is recommended to not to send any data to the HALscan head while it is still turned off,
causing a situation where it may start up in the middle of an already running data transmission. This may lead to
the first valid position command received is at an extreme and unexpected position. In such a situation, when it
jumps to an extreme scanner position immediately, this may cause damage to the galvos and/or mirrors.
The same is true during operation: when the connection has been interrupted (e.g. because the DB25
connector cable was removed), it is not recommended to simply plug it back in, as this may lead to hard jumps to
extreme positions too. In this case it is also recommended to power down the whole system and put it back into
operation using the sequence as described above.
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