--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> You probably need a pull up resistor.  To drive JP5-1 you must configure any
> axis for OutputChan0=4 or OuputChan0=12.  If you use 4 the pin will be driven in
> Open Collector mode which will only either sink current to ground or be open
> circuit.  So if nothing is sourcing current to pull it up, then it will always
> remain at ground and you wont see anything.  This is the most often used mode
> when sinking current from opto couplers connected to +5V.
>
> If you set a value of 12 it will drive the same pin but as a 3.3V LVTTL signal
> (sink to ground, or source from 3.3V).  In this mode you should see something
> with just a scope connected.
>
> PWM (pulse width modulators) generators are different from Step/Dir generators
> (KFlop has both) and are connected to JP6 so I'm assuming you meant to say
> Step/Dir pulses.
>
> I hope this helps
> TK
>
>
>
>
> ________________________________
> From: aaronkscott <aaronkscott@...>
> To: DynoMotion@yahoogroups.com
> Sent: Sat, September 4, 2010 3:04:31 PM
> Subject: [DynoMotion] is it possible to measure the pwm signal with a oscope on
> kflop
>
>  
> I have a Kflop with a Kanalog board. I am using Kflop's JP5-1 to try to see a
> PWM signal for step0 ( configured as step/dir output ), but I don't get any
> output. I give a velocity of 100 in the console, and see the axis 0 increments.
> I have tried referencing ground, 3.3V, 5V. Has anyone tried using an
> oscilloscope to measure see the pwm signal.
>
>
> I have tried every wire on JP5, checked my cable for continuity, and I am a a
> total loss as to what is wrong.
>
> Ultimately I would like to connect my servo amp that uses PWM signals to drive
> my servo's.
>
> Could someone please help?
>