53 CNC SYSTEM 2007.9/30
|1.The following is a block diagram of my CNC system.
It took about one year to complete the CNC addition through a trial and error process.
It has a parallel connector and a USB interface.
|3.This is screen shot of CAD/CAM software.
It is called "Nc Editor WT3NC." (Japanese Version only.)
|4.This is a screen shot of the CAM output.
|5. 5. This is a screen shot of the USB CNC control software that I mainly
This software has an intuitive interface and is easy to program.
USB CNC SITE IS HERE
|6. The USB CNC requires dedicated hardware that is supplied
by the developer.
The step pulse is output from this board.
|7. I also use the MACH as a subsystem.
The step pulses are an output from the parallel port of the computer.
|8.This is the inside of the control box.
The control box includes the following boards:
Pulse Width Converter
Level Convert Interface
|9. This is the front panel of the control box.
The parallel connector is for the MACH.
The Emergency STOP button is on the right side.
A Power On indicator and Servo ON-OFF switches with LED are also included.
|10. Level Convert Interface board.
The output is 5 volts, balanced.
This board was designed and produced by my friend.
|11. The output pulse is very narrow and can be varied.|
|12. A trial run of the servo motor is shown.|
|10.These are the motor driver amplifiers.
The left two are servo motor amplifiers
The middle one is a stepping motor amplifier
ORIENTAL MOTOR RKD5114L-A
The right one is a stepping motor for the A axis.
|11. This is an interior view of the reduction gear mechanism.
A manual handle is installed, but a clutch is included for handle movement to be OFF during CNC operations.
The reduction mechanism is not always necessary.
Direct couple system also works.
|12.The mechanical limit switch is installed.
The maximum feed speed is F2500.
The movement of this system is very stable.
Powerful, no stop, no step out.
|13. Ball screws are installed for the x-axis and y-axis.
The ball screws greatly reduce the mechanical load of the servo motors.
To me, the use of ball screws is needed to have reliable operation if a general purpose milling machine is converted to CNC.
|14.Ball screws and nuts. One end has been processed.|
|15.The end of the ball is being machined. The ball screws are hardened
and require specialized machining techniques to produce the needed precision.
|16.Making a ball screw nut holder with the lathe because the milling machine is disassembled.|
|17. This is Z-Axis view.
A stepper motor is installed on the micro movement mechanism.
|18.Inside view of the Z-Axis.|
|19.This is a view of the z-axis mechanism.
A small, shop made oldham type coupling is used.
|20.One of the most impressive applications of the CNC system.
|21.The rear panel holes of the control box were made with the CNC.
PLEASE SEE THE MOVIE FILE
|The following is a CNC system in the stepping motor before the current servo system is completed.|
|22.Stepping motors and drivers.|
|23.Finishing of the oldham type coupling.|
|24.This is my first CNC system. It consists of stepper motors and a direct
Stepper motors are much cheaper than servo motors and easier to control.
I am pleased to report that the CNC system works very well.
|25.This is a view during testing of the stepper motor while it provides direct drive to the x-axis.|