I have a few stepper motors that have encoders one one side of them, Does anyone have a schmatic or know where to get a 3 chanel encoder interface board for around 100$
Do most Encoder interfaces use serial, parrelle or ISA/PCI??
I have a few stepper motors that have encoders one one side of them, Does anyone have a schmatic or know where to get a 3 chanel encoder interface board for around 100$
Do most Encoder interfaces use serial, parrelle or ISA/PCI??
Most 3 channel encoders are quadrature output (2 channels) and an index channel.
The quadrature output (channel A and channel B) have the following output (CCW):
A 0011001100..
B 0110011001..
The CW output is the reverse:
A 0011001100..
B 1001100110..
These outputs are usually decoded by a quadrature decoder to give a "step" and "direction" output (or CLK and U/D signal for counters).
The index channel gives a single output pulse once a revolution and is generally used to give an accurate "home" position.
Mariss
Hello bcromwell
You may build simple 8 bit up/down counter using standart
CMOS IC and you can read the counter outputs from the PC
paralel port.(You must write simple software)
CHA feeds the UP/Down input, CHB feeds the clock input.
This method use the shaft encoder in x1 mode.