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valy

03 Mai 2020 13:17



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Daca il ghidezi/supervizezi extern nu vad dece ai avea nevoie de encodere, cumva prezenta lor sugereaza o bucla inchisa, ori prin ghidare externa tu inchizi bucla deci ai putea intra in conflict cu ce zic encoderele. La mine nu zice ca trebuei dezactivate, zice doar ca pot fi activate si dezactivate, dar nu si motivul sau situatia, dar sigur are o influenta undeva altfel nu ziceau ca pot fi activate/dezactivate.

Din ce am vazut in documentatia de control a monturii la AZ EQ5, nu pare sa poti interoga din soft pozitia encoderelor, ai comenzi doar pentru activare/dezactivare, deci ma gandesc ca nici ASCOM sau EQDIR nu poate utiliza encoderele, se pare ca ele sunt folosite doar de catre controllerul monturii.

1. How the motor controller control the motor speed 
- In the motor controller, there is a hardware timer T1 that is used to generate stepping pulse for stepper motor or reference position for servomotor. The input clock&#8217;s frequency of the timer, plus the preset value of this timer, determine the slewing speed of the motors. 
- When T1 generates an interrupt, it might:
 o Drive the motor to move 1 step (1 micro-step or 1 encoder tick) for low speed slewing.
 o Drive the motor to move up to 32 steps for high speed slewing. This method applies to motor controller firmware version 2.xx. For motor controller with firmware 3.xx or above, the motor controller always drive the motor controller 1 steps/interrupt

3. Calculation on Master Device 
A Skywatcher motor controller does not do complex calculation. The master device do it instead. 
- Calculate the angle 
A Skywatcher motor controller only counts the step or the ticks of an incremental encoder on the motor shaft. But a master device can inquire the motor controller the resolution of the telescope axis (how many steps the telescope axis have for one revolution). We called it CPR (Counts per revolution). With CPR, the master device can convert an angle to steps or vise versa. 

