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Servo SG90 Inverted
11-15-2016, 05:31 PM
Post: #1
Servo SG90 Inverted
Hy,
i have a problem with my Sphere-O-Bot:
When i send the command "raise the pen" the pen go down, when i send the command "lower the pen" the pen go up!!!

Any suggestion?

Thank you
Francesco
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11-17-2016, 02:00 PM (This post was last modified: 11-17-2016 02:01 PM by jpedroc.)
Post: #2
RE: Servo SG90 Inverted
(11-15-2016 05:31 PM)indian22 Wrote:  Hy,
i have a problem with my Sphere-O-Bot:
When i send the command "raise the pen" the pen go down, when i send the command "lower the pen" the pen go up!!!

Any suggestion?

Thank you
Francesco

That is...strange. The servo only gets direct commands from the Arduino and can not be connected backwards
Have you tried to raise it via this menu?    

Maybe the UP position and Down Positions are wrongly set (check the same image above as reference)
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01-16-2017, 11:36 AM
Post: #3
RE: Servo SG90 Inverted
I have the same issue above, and I am really sure the setting is the same as the picture above. I suspect that the servo has different setting. Mine, the servo has the colourings swap between the red and yellow.. could it bee the issue ?
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01-18-2017, 09:38 AM
Post: #4
RE: Servo SG90 Inverted
Try set the "PEN UP POSITION" value lower than "PEN DOWN POSITION" (or the other way around). On way or the other should work
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01-18-2017, 12:19 PM (This post was last modified: 01-18-2017 12:19 PM by irawans.)
Post: #5
RE: Servo SG90 Inverted
I have done it too. It still didn't work. It seems the servo has different movement direction. Anyway, I tried to hack the servo's movement direction, based on this: https://www.youtube.com/watch?v=4n1ec2w21pA&t=243s

And NOW it WORKS as it supposed to be.... by hacking it.. Sad
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04-11-2017, 06:14 PM
Post: #6
RE: Servo SG90 Inverted
i have the same problem :/
You should preCheck thes Servos before sending
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04-12-2017, 08:58 AM (This post was last modified: 04-12-2017 08:58 AM by jpedroc.)
Post: #7
RE: Servo SG90 Inverted
You can swap "Pen up position" and "Pen Down position" the values in the Eggbot extension so the servo will behave as intended. Image attached    
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