The ShopBot Control System
Upgrade for PRT
Tools (PRT Version 4g) is a drop-in
replacement Control Board for existing ShopBot
PRT CNC Tools. It will
bring faster cutting and faster positioning to
your tool at the same time providing 2.5 times
greater resolution and improved smoothness.
You'll get an immediate performance boost with
little time or trouble and at a very reasonable
cost. You'll also still have all the familiar
ShopBot Software
capabilities you've become comfortable with as
well as complete file compatibility ... except
that all your projects will now run faster.
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While your actual speeds will
depend on cutting factors, condition of your
tool, and the weight of accessories on your
gantries, we expect you will be able to
achieve realistic cutting speeds of 4-6 inches/sec and
jog speeds of 8-12 inches/sec with this
Version 4g Control Board. Best cutting
speeds will come with a spindle.
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Because the Geckodrive stepper
drivers micro-step at 10:1, rather
than the 4:1 of the current
PRT drivers, you
will get higher resolution motion and can
expect improved smoothness in cutting.
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The
PRT Version 4g Upgrade mounts in your
original Control Box using all the existing
connections for power, input/ouput, and
motors. The update should take only a few
minutes. (See
Upgrade Instructions)
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On this upgrade Control
Board, an additional 4 inputs and 4 outputs
are added for a total of 8 inputs and 8
outputs. The outputs are all
optically-isolated. The inputs are pulled
high and filtered.
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The board is provided
with 4 Geckodrive 202 stepper drivers. These
easily snap into (and out of) connectors on
the board. The board also has a connector
for an optional fifth driver for tools with
a second Z axis or indexer. Connections for
the additional axis are the same as on
current PRT
Version 3 Control Boards and it can be set to
operate as any of ShopBot’s 5 movement channels.
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The Upgrade Board uses
the same Control Card as our PRS tools.
Pulse rates of about 30K steps/sec are
available with a standard
USB interface.
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Note that
outputs from this board are limited to
2A/phase—just right for your existing
PRT motors.
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Yes, an older PR tool can also
be upgraded with this Version 4g Upgrade
(purchase the full box [#15314] so that you
will have an appropriate power supply).
You will also
need to re-wire your motor wire connectors
to the standard 4-wire
PRT connection.
Computer Requirements -- You need a PC
with an available USB port that is running
Windows XP-pro.
At minimum: Pentium 800 MHz, 512M RAM, Graphics
display 1024x768 for shop, 1400 x 1500 for
design. [Only works with the Sb3 (Windows)
version of the software; does not run with the
old DOS version.]