>A couple of tips, you generally find the stepper
>or app will have a fairly definite top speed.
>If you have a decent constant current driver
>you can generally get the motor up to top speed
>in about one revolution, maybe less.
>
>Most traverses will consist of a very quick accel
>ramp, long constant speed and quick decel.
>As a general guide, max accel is about 1% per step,
>so if you shorten the period of each step by 1%
>you will get a very quick accel. If you have a
>lower performance driver, like a unipolar constant
>voltage driver etc, you may only get 0.2% per step.
>Resonances will be your bigest prob on the accel
>ramp, sometimes a stupidly quick accel will get
>you through the resonance better than a more
>relaxed accel. Start the motor about 1/3 of its
>max start speed, then instantly accel from there.
>Most motors will start fine at 1 or 2 revs/sec
>as a ball park figure. :o)
>-Roman

Anyone have any experience with selecting values for caps across the
coils to reduce EMI? I have seen 0.1 uf ceramic monos used for this,
but wonder about the performance implications.

Reg

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