Hi everyone, Im currently working on a project that involves a cart in a rail using an Arduino Mega, external battery, 2 28BYJ stepper motors with ULN2003 drivers. On the ends it has 2 micro limit switches on NC and COM. The code "works"if the limit switch is pressed by hand the motors change direc…

Tapping the board for motor current is generally No, No. Use a separate power supply for motors.

[image] cattledog: When the switch goes from closed to open @Yarelix Verify you wired the correct side of the left limit switch. You are looking for OPEN when pressed so the INPUT_PULLUP can create the "1" to change directions. See if the motors are pulling against each other when it stall…

Stalling its not the issue nor the motors are pulling each other, its that the motors doesn't stop when the switch is triggered on time, the motors keeps pushing the switch. If the switch is released by hand then the motors reverse their direction, so it basically defeats the purpose of having a swi…

[image] Yarelix: Stalling its not the issue I interpreted motors not moving as stalling. I agree with @cattledog to examine the code for reading (and debouncing) the limit switches. A bouncing button might put the "state" into "keep pushing." You are looking for HIGH or LOW for your switch…

[image] Yarelix: stepper1.stop(); stepper2.stop(); This does NOT stop your steppers immediately. It only sets a new target, that can be reached using the actual acceleration/deceleration. So your motor will still go in the same direction, ramping it's speed down ... but this: …

Another question: [image] Yarelix: if (stepper1.distanceToGo() == 0 || stepper2.distanceToGo() == 0){ stepper1.moveTo(stepper1.currentPosition()); stepper2.moveTo(-stepper2.currentPosition()); } if (stepper1.distanceToGo() == 0 || stepper2.distanceToGo() == 0){ stepper1.moveTo(-…

Limit switches not changing the direction of stepper motors

Other Hardware Motors, Mechanics, Power and CNC

cattledog April 6, 2024, 11:43pm 2

You can try reading a state change of the limit switches by comparing the current reading to a previous one. When the switch goes from closed to open, make the reversal.

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Limit switches not changing the direction of stepper motors

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