Servo 300 degree problem

[Fighting For Freedom]

Hello,

I’m using jx servo pdi-6225mg-300 degrees for the wrist and hand.

When I set the midpoint at 150 degrees for the Right wrist it only gets to 180 degrees and not futher. I read in Arduino forum that you can solve that issue by using Microseconds Instead of working with degrees. But the problem is that the complete program of inmoov in myrobotlab is written in degrees. 

Another issue is that the hand moves in opposite position when going to it’s starting point 0.

The only thing that seems to work is starting from the 0 point (so where the right thumb points too), than he makes his 180 degrees turn in a natural way.

Can I leave it that way? Because the BOM say’s for the wrist 90 (150) degrees? 

Also myrobotlab use the 180 degrees servo for adjustment, not the 300 degrees.

A bit confusing for me how to set up a 300 degrees servo.

Can please someone give me advice.

Thank you  (to avoid Trump issues)

Marina

[gael langevin]

Hello,

Because the servo is set within the wrist with printed gears, the degree rotation is reduced because of small gear vs big gear. (it acts as a reducer)

So even if you have a servo with a 300 degree revolution, the wrist will do a max of 180/190 degree.

In Myrobotlab you can invert the rotation if you want it to turn in the opposite direction.

You can do that in the servo UI by clicking "invert" and save your configuration.

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

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