|USB CamPod Breakout Board for CNC Machine Control|
CNC Machine Motion Controller USB Breakout Board for Step and Direction Motor Drivers and Control Relays.
USB CamPod Board comes with SuperCamXp, Manual and CD.
There are 3.5mm pin spaced terminal blocks for directly connecting to external motor drive modules. There is one terminal block for each axis, each terminal block has the step, direction, +5V and ground for that axis's motor driver.
There is an optional 3.5mm pin spaced terminal block for home limit switch sensing for X, Y and Z axis. Each axis's sense line has an on board 1K pullup resistor.
There are on board relay drivers for two external relays. The current sink should not exceed 100 ma from the external relay. There is one 2N2222A transister used to sink the current of each external relay coil. Relay A is automatically activated by SuperCamXp to turn the spindle on/off or the plasma torch on/off. Relay B can be used to freeze THC adjustments when motion speed is ramping or to control coolant when used with milling machines.
Two LED's on board but not currently hooked up. The intent is to hard wire them to indicate Controller enabled and Current High status. There is one power indicating LED that is operational by default.
The on board single board computer that creates the machine control, step and direction signals for the motor drivers thus freeing the host computer from real time duties.
The Board accepts DB25 Female connector to match a standard PC Parallel Port connector and the 26 wire Ribbon Cable connector, the control signals can be reassigned to different pins. There are feedthru holes for each signal and each signal pin in the DB25 female connector. By default there are traces on the top of the board connecting the signals to the pins compatible with Super Tech motor controllers. By cutting these traces and rewiring the signals to the appropriate DB25 pin feedthru the CamPod can be made plug and play compatible with other manufactures step and direction motor controllers.
There are two(2) 74LS244 integrated circuits, mounted in sockets, that electrically isolate the RCM2300 from the controller outputs and inputs. This assures signal strengths compatible with the standard parallel port and protects the RCM2300 from damage caused by shorting output signals to ground. Should the connections to the controller be connected in the wrong manner the intent is to sacrifice the 74LS244's and save the RCM2300 from destruction.
There is an empty fourteen(14) pin DIP socket for polarity conversion of signals when required, power and ground are connected as if a 74LS14 signal inverter was installed. There are feedthru holes for each pin making it convenient to convert signal polarities.
Power for board derived from the USB connection, no power supply required. The current consumption of the circuitry is less than 200 ma, leaving ample current to drive opto isolators in external motor drive modules.
The Board is 4 x 6 inches with mounting holes inset .25 inches from each corner the holes are 0.150 diameter. The board can be mounted inside of an existing controller box.
Shipping weight with SuperCamXp, Manual and CD is three(3) pounds.
Step and Direction Terminal Blocks for connecting to motor drivers.
Limit Switches and Relay Control Terminal Blocks for connecting to motor drivers.
USB Connector to CamPod Board and the Rabbit Single Board Computer.
USB CamPod Electronics Schematic
Home Page at http://www.super-tech.com
Published 7/6/2017 4:26:48 PM
Copyright 2016 Dennis Bohlke