Re: EHP External Hardware Proposal

> Keep it simple and do not reinvent the wheel.

> To make an external multi-axis, coordinated controller board is a
> significant undertaking.

What's the upper bound on per-unit cost where the "external printer
controller" approach ceases to be attractive? As you approach
$1K/each (a price which must include development costs), you can
replace custom hardware with an entire standardized PC running
standardized EMC over RT-Linux, and talk to it from WinNT over
ethernet. Commodity PC cycles are some of the cheapest available. If
EMC/RT-Linux is a pain to set up, why not just fix *that*?


A member of the League for Programming Freedom (LPF) http://lpf.ai.mit.edu
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Brian Bartholomew - bb@... - www.wv.com - Working Version, Cambridge, MA