The RA absolute signal is factory adjusted to fall within 2 hours of the
meridian with the OTA on the Western
side.
In Declination the absolute signal is in
the zone of cca -10/+30 deg. This will
allow a safe and convenient initializing
when needed. Note that the Losmandy
lock handknobs must face upwards for
the reference to fall in the above zone.
To initialize the G53F with the encoders
go to the
Get Reference
submenu in
the
User Parameters
menu and slew
the mount into the above mentioned
positions as promted by the hand
controller. Reaching the signal is acknowledged by a beep and the slew stops
automatically
Tutorial.
and http://youtu.be/rvYxOLQJfgQ
Using real time tracking speed correction
The encoder fitted to the G53F allows a closed loop control of sidereal
tracking speed with a precision of 2” pv, suitable for shooting unguided
images with short focal lengths or doing automated photometry sessions.
The tracking correction can be turned on in the PEC menu of Pulsar2.
The rate of correction is 60 sec, so there is a need to wait about 60 seconds
from the end of a slew before tracking becomes stable.
A precise Polar Alignment is necessary for unguided imaging. I suggest the
King method offered by C2A, a free Planetarium program.
Here is a manual for using this method and other features of the program.
http://www.geminitelescope.com/Manuals/Pulsar2_C2A_manual_eng.pdf
Practical hints
You can open the axes while the mount is in use and rotate the telescope by
hand but if you do very fast movements positioning will partially be lost.
If the mount hits something the slip clutc will disengage and protect the drive
system and the telescope from damage. If a goto fails for the above reason
you will hear a beep and there will be no correction. The coordinates will stay
G53F manual ver 2.7
p12 June 2017
www.geminitelescope.com
