Implementing a repetitive sweep is not difficult. When the total
count memory location I mentioned in my previous post reaches a preset
value you could stop counting pulses, send a signal to the plotter to
lift the pen, reset the total count memory location to zero, feed the
zero count signal to the plotter to reset the x axis to zero. drop the
pen and then restart counting pulses. Most likely you will need to add
a delay between the time when a zero count signal is sent to the plotter
and when you drop the pen to account for the time it takes for the x
axis to reset to zero.
On 7/3/2011 3:05 AM, g8voq wrote:
> --- In Electronics_101@yahoogroups.com
> <mailto:Electronics_101%40yahoogroups.com>, "g8voq"
> <hobby_electronics@...> wrote:
> > It would be good if the ramp voltage (timebase) could me made
> repetitive, that way in 7 days the X-pot would have travelled 7 times
> along the X-plot. Would need to have a flyback action. I think the
> HP-7035B will do 50cm/sec slew speed and possibly a bit better.
> Of course, as to flyback, there needs to be blanking. I think the pen
> can be lowered and raised by electro-mechanical means.
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