From the original Synthetos forum (2011–2025)
i have just received a tinyG
on either m3 or m4 commands the led for SpOn does not light up.
I've measured voltage of .07v when m3 or m4 are sent.
I get 0V on Spin (as expected) after m5
PWM appears to output 3V at 100% duty,
Cool also appears to output 3V when enabled with m8
Should I expect to see 3(ish)v on Spin and SpOn producing light when m3 or m4 commands issued?
thx
On a fresh tinyG (no parameters changed), You should see happen when sending G code:
> M8 - turn Coolant LED on
> M9 - turn Coolant LED off
> M3 S10000 - turn SpOn LED on and PWM LED on
> M5 - turn SpON LED and PWM LED off
PWM probably won't turn off.
Send $p1pof = 0.0 to change the off state phase of PWM to 0.0
Then reset tinyG with reset button (sometimes required for the $p1pof parameter to be re-read)
Retry M3 S10000, then M5
PWM LED now Turn on, Then off?
SpOn(and Spin terminal) still stuck off on staying at 0.7V max?
That sounds like a defective port output.
Anything connected to the Spin port terminal?
Some of the M commands are synchronized with moves (can’t remember which), so when testing, follow M with a move.
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