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The spare part, NTC104LAF/SP is a 100k NTC Thermistor for the second generation hot end on the K8200 3D Printer
Fits through a hole in the heater block for better temperature control of the extruder’s hot end
The thermistor provides feedback to the controller for temperature control
Replacement stepper motor driver card for Velleman K8200 3D Printer
Controls the MOTS4/SP Stepper Motors of the K8200 3D Printer
Can be used with a wide variety of stepper motors
Simple step and direction control interface
Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step
Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection
Short-to-ground and shorted-load protection