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Re: Mount does not stop Update
There are two sets of software, the one in the keypad and the one in the
servo controller. These two are separate from each other and stand alone from each
other. Version 4.12 is the keypad software, but this has no effect whatsoever
on the action between the servo controller and other external command
software such as Pulse Guide and TheSky6.
If the servo controller is not responding to external commands, it might be
because it is being overloaded with requests (such as position requests from
The Sky6). This was a weakness in very early software and was fixed in later
versions of the servo control software (not to be confused with the Keypad V4.12
software). I asked Mike, our development engineer, and here is what he said:
Very early versions of firmware occasionally dropped com port characters if
the com ports kept the mount very busy. I do not recall which version
introduced the fixes. But I recall dealing with Bob Denny, Ray Gralak, and a couple
others on this. Bob e-mailed us "Port Mon" sessions that showed dropped
commands. We also replicated issues with the mount dropping move/stop commands from
the keypad until the software was fixed. The reason the keypad is affected
is because there were brief periods of time that the controller was busy
processing commands from other ports while the interrupts were disabled. If the
controller is "out to lunch" longer than two characters (2.3mS), one character
could be ignored, which could make the entire command unrecognizable and
Marj might have records that show what firmware versions introduces the fixes
to these problems, we recently discussed revision history of the world.
Otherwise I can look it up later tonight.
If he is ordering an E1 chip, he must have a GTOCP2. I do not recall these
problems with the GTOCP2, but a new chip is the next logical step.
Therefore it appears that your mount has some very old version of servo
control software which had problems handling more than 1 input from external
programs. We have basically solved this in later chips, so hopefully this will go
away when you receive the new chip.
This is also something that others should be aware of if they have purchased
a used mount from another individual. It would be a good idea to check the
chip set that is in the servo (easily done by removing the cover plate), as well
as checking the keypad software version. Updating everything is not expensive
and can avoid headaches like the ones in this post.
In a message dated 8/14/2007 12:14:14 AM Central Daylight Time,
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