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Re: Blue Screen


 

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In try, in short: The mount tracks, that means the ARM controller sends pulses for motor steps. The servo pics try to follow with small or no lag, David programmed the control loop with P, I and D parameters. The higher the lag, the higher the power to the motor by increasing the PWM duty, the more torque it delivers but also the current thru the motor increases. Too tight a worm, significant disbalance, ... can cause it. A significantly high power consumption while tracking is not good for motor and your battery, so this is one of the indications for a stall condition. Gemini signals to you with stall messages and beeping that you should improve the situation. In RA a loose gear mesh is no problem since the motor always moves into the same direction even with guiding. Temperature changes may influence the gear mesh a bit, cooling down at night makes the mesh tighter and if the mount is new the worm and wheel may need to "run in" a bit like the motor in a new car.

You can watch the current lag and PWM duty needed at the MENU->MOUNT->Balance screen.

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Am 10.07.23 um 17:17 schrieb peter@...:

Okay thanks, Yesterday I got some strange erratic beeping right before the mount reached its limit. At the same time, I was getting "RA Stall!" on the display. The spring-loaded worm was too tight. Can you explain this please?

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