Bert Eding, The Netherlands
Chamber of commerse #: (NL)17206969
Vat #:(NL)141528023B01
 
Change your PC/Laptop into a USB CNC controller.
 
 
Hardware:
CPU V3 with an 18F4550 PIC microcontroller.
 
Inputs:
  • Emergency stop
  • 4x End of stroke for homing
  • Probe
  • Pauze
  • Run
  • USB (V2.x) from PC/Laptop
Outputs:
  • 4x Step / Dir / amplifier enable
  • Emergancy Stop
  • Flood coolant
  • Mist coolant
  • PWM
  • TOOL Direction
  • AUX1
Max step frequency:
  • 25 KHz step frequency
  • 4 axis
  • Pulse width 2 uSec.
4 Layer conventional design, based on Microchip 18F4550 PIC Download the product information
This board does NOT contain the power electronics to drive the stepper motors directly.
For each of the maximum 4 steppers you must be added a stepper motor drive.
 
Download the product information CPU_Board_V3 All the Prices in Euro excl. shipping
    NoEU EU EU is including VAT
Price build and tested USBCNC_CPU_3_BT NoEU is excluding VAT and
delivery outside Europe.
incl. USBCNC software      
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CPU V4 with an Atmel AT91SAM7S64 32 bits RISC microcontroller.
 
Inputs:        
  • Emergency stop
  • 5x End of stroke for homing
  • Probe
  • Handwheel input
  • Pauze
  • Run
  • USB (V2.x) from PC/Laptop
Outputs:
  • 5x Step / Dir / amplifier enable
  • Emergancy Stop
  • Flood coolant
  • Mist coolant
  • PWM
  • TOOL Direction
  • AUX1
Max step frequency:
  • 75 KHz step frequency,
  • 5 Axes
  • Pulse width 5 uSec. and up.
Others
  • PICstep compatible
  • All IO buffered and filtered
4 Layer SMD design, based on Atmel AT91SAM7S64 32 bit RISC CPU. Download the product information
This board does NOT contain the power electronics to drive the stepper motors directly.
For each of the maximum 4 steppers you must be added a stepper motor drive.
 
Download the product information CPU_Board_V4
 All the Prices in Euro excl. shipping
    NoEU EU EU is including VAT
Price build and tested USBCNC_CPU_4_BT NoEU is excluding VAT and
delivery outside Europe.
incl. USBCNC software      
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Software
  On your PC/Laptop runs an application that communicate with the USBCNC interface.
The application can run under Win2k and higher.
  Version 2.xx
 
 comes later in 2008.
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  Version 3.xx
  This is a completely re-written version with many new features.
 

I just put USBCNC V3.16 (Beta) on the website, for all people that want to experiment with Look Ahead Feed.

This is a brand new trajectory generator that can be switched on in the setup by activating the LookAheadFeed checkbox.
Besides this checkbox, there is a new parameter called min.angle, which I will explain further on.
 
First, what is the result: Very high speed for programs that consist of small lines, like the one exported from CorelDraw.
Look Ahead Feed or (LAF), will accelerate through over segments, which cannot be done by the standard trajectory generator.
Lines connected with an angle between 0.01-15 degrees specified by min.angle in the setup are considered as tangential connected, so for these lines LAF will accelerate through.
The blending option G64/G64 Px.x is still there for lines that connect with sharper angles as specified in min.angle.
 
Be carefull with the setting of the angle, because large acceleration peaks will occur on the machine. I have set the default to 6 because this allows to run a Coreldraw arc (50mm radius) with about 7000 millimeters per minute depending on your acceleration setting. In LAF, the radius of the curvature is estimated and the speed is then limited such that the max tangential acceleration is not violated like in a real circle:  Vmax = sqrt(maxAccel * radius). In the small corners of the CorelDraw pseudo circle, acceleration peaks will occur. Fortunately, it seems that machines are somewhat forgiving on this and can handle more than I thought. Ofcourse, this setting and the speed given should be handled with care, as loss of steps may be the result. 
Remember, this is Beta software which is rather complex, so be careful and let me know what your experiences are.
 
 

The first beta version of the software, with ENGRAVING, POCKETING and PROFILING modules is now availeble and
you can download it on the download page.
On this momont I write the manuals how to use the modules and to make nice gcode for executing.
  , click here and see some screenshots of the new GUI.
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Manual
  The maual explains not only the software,
but gives also a lot of information about other things.
 
So download the PDF file.
CNC manual (English)
Version:
Date:
Vieuw:
comes later in 2008.  
   
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Test setup
  Here we will show and explain what you need,  to build the interface between your PC/Laptop and your CNC machine.
So we hope that you get a good impressing of what you have to buy to build a compleet system.
 
Nr Explanation
1 USBCNC (CPU V3) interface.
2 IO breakout board.
3 Transformer (300VA).
4 Powersupply:
IN 35 V DC
OUT 5, 12 and 42 DC for the motors.
5 Stepper motor drivers.
(PICstep clones)
6 Steppers
  
   
   
  comes later in 2008.
 
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Designed by BoBaSoftware 2008