Two nozzle + Smoothie ware : "cam radius" issue

[marceau....@gmail.com]

Hi,

I'm trying to configure a two nozzle head with  one stepper for two nozzle, same as the picture :


But I don't understand why I need to put the cam radius in OpenPnP as I already compute the right step per mm in the smoothie board (with cosinus angle etc)

It seem OpenPnp already do transformation and send "false" value to the smoothie.

How I need to configure the smoothie and OpenPnP with this type of nozzle ??

[bert shivaan]

I can't tell you how to configure it, but I can tell you why you need to. In the smoothie config, you are telling it how many steps per degree of rotation. Smoothie does not translate that to linear motion of the head. As the nozzle goes down, you need more rotation to move the nozzle the same amount.

So openPNP does this math and sends the correct information.

Does this make it more clear?

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[marceau....@gmail.com]

Ok, I think my issue is here ! 
In smoothie I put step / mm, so I already do the math.

I will test with step per degree instead !