PWM output for spindle

[Peter Homann]

Hi,

I don't know if this has been mentioned, but you also need to do to the motor tuning tab for the spindle and set the acceleration to a reasonable value. If you don't do this, the default acceleration value  is so low that it takes forever to get to a measurable value.

Cheers,

Peter.

[Repmo]

for 0-10 volt, use 1 output on SS, connect it on optocoupler, transistor side of opto, supply on drive reference 10 volt and drive signal, in serie with 1 diode and add 1 small capacitor.... 

the SS will generate PWM pulse for charging or discharge capacitor  may be 2-8 volt....    in your drive you probably had calibration function for setup minimum and maximum Input signal....

[hunserv]

Hello Sergey, I`d have some questions:

For Spindle Speed Control, are you using the upper-left section of that schematics?
Does it give a linear output signal?
How do you set up MACH for this? Step/DIR spindle control? (and what frequencies/speeds)
For DIR I assume a separate relay can be used which is not drawn in the scematics, right?

I have made such board, for a basis have taken this scheme: http://cncrouter.ru/images/lathe.gif
+ two relays for inclusion of a spindle and change of a direction of rotation.

[hunserv]

For PWM spindle speed anyway does someone know what Base Freq values can be set reasonably for the SS???
I need in fact 0-10V control, but for low PWM freq. as 10Hz, I`d need at least a 3rd order filter and some more components to have a relatively good spindle speed response on the command values...

[hunserv]

So I built my PWM-Analog converter of active filters, with adustable amplification for better calibration.
Now as I use it I had another question raised:

Does anyone how the PWM resolution changes with PWM frequency?
(Separately for PP output and for SS output)