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CNC for the desktop machinist and hobbyist.
3 Axis
®
HobbyCNC
Chopper Driver Board Kit
Assembly Instructions
PRO Rev2
Thank you for purchasing our 3 axis HobbyCNC PRO kit. The following
information and the step-by-step instructions will assure complete
success and satisfaction. Please read through the following before
beginning any construction to get familiarized with the process.
NOTE: Machinery driven with this device can and will start without
warning and may cause injury or even death. The builder of this device
assumes sole responsibility for its use! IF YOU DO NOT AGREE WITH
THIS, RETURN THE KIT FOR FULL REFUND, LESS SHIPPING AND
HANDLING FEE, BEFORE STARTING ASSEMBLY.
Specifications:
• 3 Axis Unipolar Chopper control. Individual OR simultaneous
control of 2/4 Phase Stepper Motors.
• Accepts 5, 6, or 8 wire stepper motors. 4 wire types are not usable.
• 42 VDC maximum input voltage, 12VDC minimum input voltage.
• 3.0 Amps Maximum per Phase, 500ma (.5A) minimum. Individually
adjustable throughout this range.
• 1/1, 1/2, 1/4, 1/8, and 1/16 Micro stepping.
• Step and Direction Control.
• Idle Current Reduction to 50% when Enable signal is low (Pin 1).
• Built In Protection Circuit to help against blown chips on stepper
motor short or open connections.
• Power On Reset.
• On board voltage regulation for 5-volt logic and 24VDC for cooling
fan (not provided) from motor power supply.
• On board connections for home and limit switches with 10K pullup
resistor provided to each.
• Minimum of components to make assembly fast and easy.
Tools Required For Assembly:
• 15-25 Watt soldering pencil
• Side cutters
• Voltmeter
- Page 2 -
• 1/32" Rosin core solder
• Pliers
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Summary of Contents for HobbyCNC 3 Axis PRO Rev2
- Page 1 Thank you for purchasing our 3 axis HobbyCNC PRO kit. The following information and the step-by-step instructions will assure complete success and satisfaction. Please read through the following before beginning any construction to get familiarized with the process. NOTE: Machinery driven with this device can and will start without CNC for the desktop machinist and hobbyist.
- Page 2 Construction Step by Step: This completes the basic construction. DO NOT INSTALL U1, U2, U3 or U8 1. Compare all the parts against the parts list on page 11. UNTIL THE FOLLOWING TEST IS MADE! 2. Insert the (7) 10K (R1, R2, R3, R4, R5, R6, R9. Brown Black Black Red To make sure no errors were made, apply at least 12VDC BUT less than Brown) resistors.
- Page 3 **A fan (24VDC) and heat sink are recommend for cooling at motor currents of 2A or more. Page 10 has a suggested heat sink from 1/8” aluminum flat stock. For non HobbyCNC motors, consult the motor vendor for wiring diagram and wire colors.
- Page 4 Board Diagram Microstepping The driver board allows (5) different modes of driving your stepper motors. These can be set differently between each axis if desired. As a side note, 1/8 and 1/16 stepping MAY require quite a lot of computer process power! The microstepping is set via P2 through P5 as follows: •...
- Page 5 Find the fault and correct it. Steppers will get warm. Also the chopper frequency can be heard in the steppers. This is normal. The HobbyCNC PRO heatsink is available pre-marked for easy drilling-and- tapping. Includes screws and heatsink paste (hobbycnc.com/product/5865). - Page 9 -...
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Page 6: Parts List
Thru Holes, Rev 2 Step by Step Instructions & Kit Contents List Stepper Motors and Power Supply Not Included HobbyCNC.com ® © HobbyCNC 26576 Sierra Vista Mission Viejo CA 92692 +1 949-445-1110 HobbyCNC PRO 3-Axis Rev02 Manual, Rev c - Page 11 -...
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