Home › Evil Mad Scientist Forums › Egg-Bot › motor can’t hold up pen arm › Re: motor can’t hold up pen arm
April 12, 2014 at 12:57 pm
#21815
ragstian
Participant
Hi
Your supply is probably OK for driving the eggbot. The problem seems to be your current potmeter setting.
With the pot at maximum the current to the motor is too high – the driver chip protection circuitry kicks in – causing the jittering. Try setting the pot to 11 o’clock position (full travel from approximately 8 to 4). On my ver13 boards this results in a current around 570mA which works nice.
(Please be aware that the silkscreen print on the board with indicates counterclockwise rotation for increase in current is incorrect.)
Good luck. Please feedback on results.
RGDS
Ragnar