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In case you are looking for a cheap CNC controller for your CNC machine, Compare-Bear.com will help you out. With a good CNC controller you can build any automated machine you desire. For example you can automate your Proxxon MF70 milling machine or your scientific microscope.
cheap cnc controller
You have different options to get a real cheap CNC controller. Check out the open source Arduino Microcontroller, our DIY CNC controller schematics or cheap CNC controller boards on the market. Please take a look at the following options:
Arduino Microcontroller & GRBL software
Control your stepper with Arduino & GRBL
Among many makers in the maker scene, however, many builders are now using a CNC controller with Arduino and the GRBL software.
Popular CNC machines for hobby and model making often require a PC with parallel port or USB port to control. The computer sends the control signals to the CNC machine via the connected cable. With Arduino & GRBL you even could use the Arduino to do the whole job.
GRBL is an open source software that converts G-code and can convert it directly into control commands for the CNC power amplifiers. The Arduino is also an open source developer board. For the control of the CNC axes there are already suitable CNC shields (additional boards for the Arduino) available from various dealers.
2D contours are absolutely no problem for GRBL. For complex 3D surface contours, conventional tools should be used, since the computing power of an Arduino is limited.
But why would you want to build an Arduino controlled CNC machine anyway?
Well, there are more than 6 reasons to choose an Arduino as a replacement for the PC:
- You need a small, compact, portable controller.
- Eventually you don’t want to waste the sparse space in your apartment for an old PC with parallel connection.
- You would like to have a customizable custom control written in C.
- In you opinion in would be good to have access to the source code of the control of your CNC machine.
- You want to build a self-sufficient machine that simply runs a preset program at the push of a button.
- Maybe it is an advantage that GRBL and Arduino works via USB / UART
Arduino CNC Shield V3.51 - GRBL v0.9 compatible - Uses Pololu Drivers
- Added circuitry for End-Stop and Probe signal filtering. This eliminates false triggers and makes it possible use non-shielded cable for end-stops/probes. Bigger Solder pads making it easier to assemble.
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Cheap CNC Controller made yourself: L297 / L298 schematics
A very basic and simple stepper motor controller is based on the two ICs (IC=integrated circuit) named L297 and L298. I created the following schematics for you. Of course you will need to create the PCB and have a soldering station in order to make this.
Check out the L297 & L298 controller datasheets on the manufacturer sites:
Schematics for L297/L298 controller
On the left side is the voltage stabilization for the 5V logic voltage. The IC L297 is centered and the L298 on the right side. 1 bipolar stepper motor can be connected to this board.
(Note: bipolar control is usually at stepper motors with 4,6 or 8 connection cables possible)
Weller WLC100 40-Watt Soldering Station
- The high performance analog Weller Soldering Station produces up to 900° F to handle many soldering projects
- Variable power control dial adjusts power from 5 watts to 40 watts for accuracy
- Quality, lightweight pencil iron with cushioned foam grip provides extended comfort during long term soldering projects
Free shipping
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Sainsmart CNC Micro-Stepping Driver Board
Also very popular among hobbyists is the the Sainsmart stepper driver board.
SainSmart CNC Micro-Stepping Stepper Motor Driver 2M542 Bi-polar 2phase 4.2A Switch
- Suitable for 2-phase hybrid stepper motors (Outer diameter: 57,86mm).
- H bridge bipolar constant phase flow subdivision driver.
- Speed self-adjustment technology.
- Easy current subdivision setting.
- 2--64 resolutions,16 operation modes.
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SainSmart 4 Axis CNC controller board
If you need more than 1 axis you could also consider Sainsmarts 4 axis breakout board.
SainSmart 4 Axis Mach3 USB CNC Motion Controller Card Interface Breakout Board
- Support for 4-axis linkage, you can connect four stepper motor drives or servo drives; Maximum step-pulse frequency is 100KHz, which is suitable for the servo or stepping motor.
- General-purpose opto-couplers isolation input: can connect the limit switch, emergency stop switch, auto tool zero, home switch, etc.
- Support for 4-axis linkage, you can connect four stepper motor drives or servo drives; Maximum step-pulse frequency is 100KHz, which is suitable for the servo or stepping motor.
- General-purpose opto-couplers isolation input: can connect the limit switch, emergency stop switch, auto tool zero, home switch, etc.
- Have 0- 10V signal output, you can use mach3 software to control the spindle motor speed.
- General-purpose isolated relay drive output interface can drive four relays for controlling the spindle starts, forward rotating and reverse rotating, pumps or other devices.
- Support for connecting electronic handwheel.
