[SOLVED] MesaCT problems with 7i96 pwm spindle

250 mA is really marginal...
 

oddwick wrote:

the 7i96 is powered with a dedicated 5v 0.55a psu. i adjusted the pot to 5.42v(i dare not go any more)

That is really, really not a good idea, 5V supply should be 5V+-5%, so 4.75V-5.25V.
Maybe Mesa can handle it, but i would not even try that without confirming first.

PCW wrote:

250 mA is really marginal...

so what would you recommend?  am i under powering it? 

thanks tom for the words of wisdom as always. i have some new modules coming this afternoon and i will give those a go. ill also dig around and see if i have another 5v din psu floating around. i thought i had a 2a one somewhere here

Actually, the PWM --> analog circuit normally should not
care what the PWM input signal level is as long as it's enough
to drive the input circuit. That is, it should work identically
with a 4V signal as a 5V signal.

that is what i thought. it should just be a proportional voltage coming out, but there must be a small load on it because my pw
voltage drops about 0.5v when i plug it in and tye only way i can get 10v or close is to increase the input voltage to the module to 14v.

these are the new ones i have coming.
a.co/d/5rSxmMy
which is similar to tye board i have now.

i could just use rs485 to control the spindle, but this is a big machine and at least for now i use the same computer to control 3 machines and i dont want to have 2 cables running across the floor. i trip over one often enough, so i need to try and get this pwm running