Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Flip-flop (electronics) wikipedia , lookup
Integrating ADC wikipedia , lookup
Radio direction finder wikipedia , lookup
Power electronics wikipedia , lookup
Integrated circuit wikipedia , lookup
Electrical connector wikipedia , lookup
Regenerative circuit wikipedia , lookup
Direction finding wikipedia , lookup
Index of electronics articles wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Time-to-digital converter wikipedia , lookup
Adding Limit Switches to the BE-SP6 You can use Computer signals instead of Direction and Clock switches. Direction Switch Control connector Clock Switch Run / Stop Stepper Connector Power (+ and -) 4 Stepper Wires 7 to 18 VDC power for the BE-SP6 circuit. BE-SP6 Circuit 20K resistor Main Speed Adjust Pot. Max Speed Adjust Pot. Set once. (2) 500K Pots Optional NO Com NC 2 Momentary Push Button Limit Switches. For left and right travel limits. WARNING: Don’t press “both” switches at same time. Stepper Motor Power Supply NO Com NC Stepper Motor Driving Belt NO Normally Open Com Common NC Normally Closed This is a wiring diagram to help you connect wires to parts. You can use 22ga wire for anything connected to the control connector. Red lines are only +5 volts . Black lines are Ground (0v) Green lines = Digital signals, can be only 5 or 0 volts Gray lines are for the Stepper and Stepper power. Blue lines = Analog signals, any voltage between 0 and 5 volts. Used to adjust the slowest and fastest speeds. If you don’t use the two pots you will be running the Stepper at a slow speed. This circuit will run the Stepper in one direction until one of the Limit switches is pushed. Then it will reverse the stepper until that switch is not pushed any more. It will continue to push and release the switch as long as the Clock switch is in the run position. If you flip the Direction switch the Stepper will travel in other direction until it gets to the other Limit switch. You can get several things reversed and it wont work right. Test the circuit wires first, find what Limit Switch will reverse the motor when pushed. Only one switch will reverse Stepper depending on the direction it was going before it hit that switch. The Clockwise limit switch will not stop a Stepper going Counterclockwise. Same for other direction. Copywrite Robert D. Roan 2007 Bob’s Engineering Colorado USA Limit Switches for the BE-SP6 Circuit 2 of 2 Example: If you set the Direction switch to make Stepper go Clockwise, then flip the Clock switch to run, the Stepper will turn Clockwise until something hits the “Clockwise Limit” switch. Same for Counterclockwise. If you placed the Clockwise Limit switch in the right place the Stepper will reverse then chatter at that place until you stop the clock or you change direction with the Direction switch. When pushed, both limit switches will “electrically reverse” the direction switch. If you were going Clockwise and you hit the “Counterclockwise” limit switch, Stepper would just keep going. We designed this circuit to override the direction signal going into the BE-SP6 if the limits are hit. DON’T do the “lets see what happens” thing and press both the limit switches at the same time. In real life the motor can’t be at both limits at the same time. Pressing both will SHORT the 5volt power that runs the BE-SP6 circuit. Not good for it. It wont destroy the circuit but it can overheat the 5 volt regulator. If it didn’t work? Make sure the motor is moving the object toward correct limit Switch. One way to fix it: Swap limit Switch Positions or swap the wires going to the “NO pins”. Second way to fix it: Swap only the wires going to the M1 And M3 pins on the Stepper connector. Swapping Stepper connector wires will only reverse Stepper Direction. Or do both if you already have fancy labels on your Direction and Clock control panel switches. NOTE: We assume the solder jumper on the back of the BE-SP6 circuit board is in the standard shipped position. That is when the internal clock will be used to run the Stepper when +5V is on the “Clk” input. CLKout CLK/En 0.1uF 4 5 RA RB 500k 14 1 2 CLK/En 2 3 A 4 5 B 6 7 CLKout 1k 13 12 C 11 10 9 D 8 (Switch up) Uses Gates A and B to produce a CLOCK to the Driver. This Switch is a solder jumper between 2 of the 3 pads on back of board. The Switch (on back of board) selects between the output of (Gate A ) or (Gate D) To change switch position, move the solder short from pad1 and pad2 to pad3 and pad2 Gates (A and B) are part of a oscillator circuit that will only run if pin 2 has a high (5V) on it. Adding resistor(s) or a pot, across RA and RB will speed up the oscillator. When the switch is up, the clock pulses from gate B go into the control circuit of the Driver. Each CLK pulse moves the Stepper one Step. It will run until the CLK/En input goes low. Gates (C and D) are part of a de-bounce (latch) circuit that will clean up outside clocks. When the switch is down, the output from gate D goes into the control circuit of the Driver. Copyright Robert D. Roan 2007 Bob’s Engineering Colorado USA