Rotary Draw Bender Controller
The COMPTROL computer bender controller was designed from the chip level up as a dedicated bender controller. The design was based entirely upon the needs of the rotary draw tube bender. The controller board is based upon the Microchip PIC16F877 RISC microprocessor and is multiplexed to give a generous amount of dedicated analog and digital inputs and outputs. The board has integral relay ports for both input and output relays and is also capable of driving analog output relays for proportional valves. For bend accuracy, the board features an opto-isolated differential interrupt driven encoder input capable of getting inputs from two separate encoders. The controller also has a separate set of analog inputs with voltage reference levels, a built in hardware driver for stepper and servo drives, and a separate input and output relay bus for future expansion. For uploading and downloading of data, the COMPTROL also has a built-in UART for serial data transfer to and from a PC.
The second encoder, separate analog inputs and stepper/servo drive circuitry allow the COMPTROL to interface with an automatic advance and rotate system giving CNC functionality at a very low cost.
For the display, the COMPTROL features a bright 4 line by 20 character vacuum fluorescent display.
Included with each order is the COMPTROL XYZ to YBC conversion program which runs on a Windows PC.
Specifications
The software for the COMPTROL includes such features as:
Intuitive menu driven part and setup screens
Alpha-numeric part names
Integrated manual and automatic controls
Programmable mandrel oscillation
Early mandrel extraction
3 return modes (manual, semi-automatic and automatic)
Pressure die assist (boost) delay
Proportional valve support for bendarm and boost
Bendarm deceleration
Automatic parts counter
Status line for the run mode
Display of Bendarm angle and current part bend data
Easy enabling and disabling of bender devices
Easy toggling of bender inputs
Two mandrel sequence modes
Automatic mandrel lube intervals
3 axis control for CNC functionality
5 and 12 VDC outputs for Encoders and proximity switches
XYZ to YBC Conversion program
ZIF Connector for microprocessor for easy updating of programs
Integral solid state relays with LED indicators and fuses on all outputs
Each of the bend parameters can be programmed specifically for each bend.
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