Re: [CAD_CAM_EDM_DRO] slave motor for geko 340???

In a message dated 11/17/2002 4:27:22 PM Central Standard Time,
brentf1@... writes:

> I am building a gantry style machine to route wood with. 2 of the axises
> have 2 screws each, I have decided to use
> a motor for each screw. Is my thinking correct? can I use two servo motors
> per geko 340 by connection one as a slave with no encoder, just connecting
> the armature???
>

What in heavens' name will insure the "phase lock" of the pair of motors to
each other? I made a HUGE X-Y table once, with a pair of "X-screws", and
connected them with sprocket-chain. Required some rather fussy "matching" to
get the rotary position of each "matched" to a sprocket-tooth such that the
"linear position" of both ball-nuts were matched (i.e., carriage was "square"
on the X-ways).

With a "free flying servo" they jus' ain't NO way this gonna happen! THINK
about it! And remember: Such things work very well on smoke, but if the
tiniest bit ever leaks out, it just won't work right again, and it is
exceeding difficult to put the smoke back IN there ! ! !

Jan Rowland, Old Troll


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