Introduction A stepper motors shaft has permanent magnets attached to it. Around the body of the motor is a series of coils that create a magnetic field that interacts with the permanent magnets. When these coils are turned on and off the magnetic field causes the rotor to move. As the coils are turned on and off in sequence called ‘phase pattern’ the motor will rotate forward or reverse.
Scope High Speed Pick and Place Equipment Multi axis CNC machines Floppy disk drives Computer printers Plotters Optical scanners Conveyers Positioning Systems
PCB ASSEMBLY PCB assembly was carried out at SPOT industries. Process Printing Pick and Place (SMTs) Manual Placement (SMTs) Reflow Soldering (SMTs) Placement (THTs) Manual Soldering (THTs)
Operating Modes We can control the operation mode of the motor using SPDT. The operating modes are: Manual Control Computer Controlled
Features Direction Control With appropriate combination of switches we can control the direction of Stepper Motor in both clockwise and anticlockwise direction. Speed Control Speed of the motor can be varied by changing the resistance control knob of the variable resistor.
Problems Faced Bridging of IC pins during Reflow due to greater pad width in Layout footprint. Mismatching of Schematic and Layout footprint pin number. Variable Resistor SPDT
Solution Manual detachment of IC pin. Removed the faulted tracks and added jumpers manually.