Ola,

Here i am :

My arduino respond to the "home command" but won't do anything from there so i try sending commands by hand through the arduino serial console.

When i start the arduino or push the reset button i get this :

POLARGRAPH ON!
Loaded machine width:650
Loaded machine height:650
Loaded mm per rev:65535.00
Loaded motor steps per rev:400
Recalculated pageWidth in steps (43789)
Recalculated pageHeight in steps (43789)
Loaded machine name:ÿÿÿÿÿÿÿÿ
Recalculated mmPerStep (20.48) and stepsPerMM (0.05)
READY

followed by a regular READY message every ten secs or something...

The Loaded machine name is strange, but i guess it's not a big deal...

So i try issuing commands :

If i send anything like :

> blahblah

i get :

< Command not parsed.

So i think i can comunicate 🙂

Trying something more meaningfull now :

> C32,400.0,END

i get :

< New acceleration: 400.00

Which is fabulous 🙂

> C31,600.0,END
< New max speed: 600.00

> C02,0.8,END
< Changed Pen width to 0.80mm

> C09,2233,3169,END ( set HOME )
< SYNC,2233,3169,END
< MEMORY,468,END

and the motors are blocked
that's fabulous 🙂

BUT WHEN :
> C01,3846,4181,END (move PEN to POINT with a low random point)

Nothing came back, and the motors don't do anything ( not relaxing or moving ) and i get "READY" message anymore...

So my guess is that the arduino has just crashed 🙁
But i have no idea what to do now ...

next step trying SET PEN POSITION ( C09 ) after reseting

> C09,3551,3108,END
< SYNC,3551,3108,END
< MEMORY,468,END

It doesn't crash and he replied.
But the motors doesn't work either instead, both of them does a very small back and forth, like one (micro?)step.

If i try with another location say :
> C09,2551,3308,END
< SYNC,2551,3308,END
and the same little back and forth...

any though is welcome 🙂

Ok, I fixed that problem, and have updated the repo with the new version. It was to do with the variable "currentlyRunning" which is the boolean that allows us to pause and run when we have hardware buttons - it basically is set to false by default, so when you did a C01, it went into the "move motors" loop that could only be exited by finishing the move.. But because currentlyRunning was false, it was prevented from doing the move to get it there! Oops, well, that's why I haven't made it the main release yet 🙂

Actually this problem has been throwing up by my attempts to try and merge the code base for the regular polargraph with the polagraphSD. There may well be a few more gotchas like that, but hopefully none quite as fundamental!

Oh, and the C09 operation - it does a little wriggle, four steps on both motors just to lock them - that's normal.

Thanks for being patient.
sn