TEMPERATURE COMPENSATION OF FOCUS
Posted: Mon Aug 02, 2021 9:26 pm
I have a couple of elementary questions, which I ask simply for the avoidance of doubt.
I have obtained a Moonlite CS focuser for my Meade LX200 SCT. This focuser has a temperature sensor which attaches to the OTA. SharpCap/ASCOM requires that I input a temperature coefficient, that is, the number of focuser steps per degree Centigrade increments. My tests show that, at a constant wavelength, the in-focus setting follows a straight line law of [[–M* OTA temperature} +Constant.]
My first question is; do I input the negative sign to the temperature coefficient M, or does SharpCap/ASCOM already assume that it will be negative?
My next question is; having concluded a manual focus using one of the tools in SharpCap is it only necessary to then check the T Comp box to have SharpCap attempt to make continuous Temperature compensation?
I have obtained a Moonlite CS focuser for my Meade LX200 SCT. This focuser has a temperature sensor which attaches to the OTA. SharpCap/ASCOM requires that I input a temperature coefficient, that is, the number of focuser steps per degree Centigrade increments. My tests show that, at a constant wavelength, the in-focus setting follows a straight line law of [[–M* OTA temperature} +Constant.]
My first question is; do I input the negative sign to the temperature coefficient M, or does SharpCap/ASCOM already assume that it will be negative?
My next question is; having concluded a manual focus using one of the tools in SharpCap is it only necessary to then check the T Comp box to have SharpCap attempt to make continuous Temperature compensation?