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This page describes the intended functionallity of the
differential encoder interface board and the encoder
isolator/splitter board. Currently I'm gouging the
interest in the boards in order to determine what the
next step will be. (Either ditch the project or go ahead
and order a batch of boards and parts.)
Update:
I now have a limited number of the differential receiver
boards available. Email me if you're interested.
henrik[at]henriksplace.se
The
differential receiver board:
The board
converts three axies worth of A-, B- and Z-signals (or 4
axies of A- and B-signals) from differential into single
ended. There's place on board for termination resistors
and each "channel" can be powered either from the
drive OR from an external power supply via the onboard
voltage regulator. The input voltage is 9-12VDC (or up
to 24VDC if extra heatsinking is provided for the
regulator).
For servo
drives that needs a minimum load on the encoder supply
output (such as the Geckodrive G320) there's place on
the board for the recommended 470ohm resistor in case
you don't want to have it connected at the drives
terminal block.
An onboard
jumper allows you to optionally connect the boards
ground to one of it's mounting holes.
The board
size is 107X55mm and all connections are being made thru
3.5mm pitch terminal blocks - either pluggable or
"standard".
The
isolator board:
The
isolator board plugs into and sits on top of the
receiver board. This board isolates and buffers three
axies worth of A- and B-signals so they can be shared
between the drive and a second unit such as a DRO or
interfaced to a Smoothstepper or LPT-port and displayed
in Mach3 etc.
The board
features its own on board voltage regulator to power the
"isolated" side of the circuit and the input voltage is
9-24VDC.
The board
size is 107X55mm and all connections are being made thru
3.5mm pitch terminal blocks - either pluggable or
"standard".
I'm
thinking of putting together kits with PCB and parts as
well as finished and tested boards.
The PCB's
will be professionally fabricated but the boards will be
assembled by me personally and manually.
Update:
I now have a limited number of the differential receiver
boards available. Email me if you're interested.
henrik[at]henriksplace.se
These
are target prices (USD):
Differential receiver board assembled and tested,
pluggable terminal blocks: $75
Differential receiver board assembled and tested,
standard terminal blocks: $65
Differential receiver board kit, pluggable terminal
blocks: $55
Differential receiver board kit, standard terminal
blocks: $45
Encoder
isolator and buffer board assembled and tested,
pluggable terminal blocks: $60
Encoder
isolator and buffer board assembled and tested, standard
terminal blocks: $55
Encoder
isolator and buffer board kit, pluggable terminal
blocks: $40
Encoder
isolator and buffer board kit, standard terminal blocks:
$35
Plus
shipping and handling.
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