QHY-5/PHD question in ref to Temma 2 Jr

[Omaroo (Chris Malikoff)]

Hi all

Just a quick question to those who have experience with a Temma 2 Jr equipped mount and have used PHD guiding software driven by a QHY-5.

I have my EM-10 guide port connected to the ST-4 port on the camera with the appropriate serial cable. The camera talks just fine to the laptop via USB as per normal. The Temma controller is set to southern hemisphere on initialisation.

Being new to the Temma, I connected the camera in PHD and attempted to start a calibration run. Nothing moved. On my G-11 all I needed to do was up the guide rate by hitting the 2x button - simple. Slewing is fine, the mount is working just fine, but calibration results in dead crosshairs. The position indicators don't increment either.

May I ask what the procedure is with the Temma?

Thanks in advance

[taxman (Matt)]

I have the Temma 2M (different serial port), but I had no problem the three times I have tested it with PHD - just set the mount to "On-camera", connected to CCD Labs Q-Guide camera and away it goes.

Of course, I am waiting for an SX M8, so I have not really taken any pics that need autoguiding, but PHD went through its routine -North, South, West and East for 10 iterations each direction and the graph looked reasonably (but not perfectly) flat.

In the old days of 28.8 modems, I always had trouble with telephone jacks with laptops - being plugged in and out took its toll I suppose - it isn't that?

Either that or it could be a win7 issue. Tom from the QHY forums recommends using it through the ASCOM platform
http://qhyccd.com/ccdbbs/index.php?P...1&topic=1924.0

[Omaroo (Chris Malikoff)]

Thanks Matt

I'm now waiting to take it outside and point the guidescope at a real star and try it again. I've replaced the serial guide cable and can hear the motors (very quietly) change pitch when I do the PHD "Ctrl-T" test that manually tests movement for 100 pulses or so in each N,S,E & W direction. If that works, then I guess my hardware is OK.

I still need to figure out what people use as a guide speed when calibrating... and then even more importantly how to change back to normal speed at the end of the calibration run.