Arduino - poznámky

Verze z 7. 6. 2017, 15:08

Frekvence pro Seben RA motor 12.67Hz

144:1 (worm gear) and 2.05:1 (printer gears) = 295.2:1. with a A4988 in a 16 microstep mode, a 200 steps motor will run at 3200 steps/revolution. if polar axis should run roughly at 23 hours 56 minutes y 4,0916 seconds (sidereal day) per revolution, this gives a 82800 s + 3360 s +4.0916 s = 86164.0916 seconds /rev. of the polar axis. for each revolution, the steps count for the motor will be (3200 x 295.2= 944640 steps), wich gives a (86164.0916 s/944640 steps) = 0.091213681 seconds/step, or 10.9632676703 Hz. this ~11Hz signal can be generated using an arduino. to keep costs low, a NE555 can be used. for a fast feed of the equatorial mount, a higher trigger frecuency can be used according t desired feed speed. a switch for direction changing of the stepper. is also recommended </PRE>