Re Twin motor axis

Er, it wasn't my post on Geckodrive. Jon's solution seems like the most serious way to go, but isn't there a way to do this by issuing an e-stop if the encoder counts get apart above a certain figure?

Simon

> Simon,
>
> I answered you on the Gecko group and told you that using two motor and two
> drivers was an acceptable way to go. If you are going to use stepper motors,
> and one side binds for any reason and stalls, chances the other side will
> also stall. It should not cause your machine to tear itself apart.
>
> Many CNC routers that I am seeing now particularly the ones that are using
> rack and pinion are driving the X axis with two stepper motors. You can do
> the same thing like Practical CNC does with their plasma machine and use one
> stepper motor and run a rod from one side to the other. Their system also
> uses a short belt at each end.
>
>
> Bob Campbell

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