HK15338 Servo Warnings

[MAURICE GLYNNE]

Just received 8 from Hobby King to add  to my existing 2 x HS805BB.  

Warning 1) : Potentiometers are round. (Reprints here I come.)

Warning 2) : All metal gears, including the end stop pin. This I had to hacksaw off as it would not come out, even using a hot air gun.

Warning 3) : As previously mentioned elsewhere:  needs 1K/1.1K/1.2K Resistors to get 180 deg movement;  Also motor needs reversing, one way or another.

Beginning to wonder whether the cost saving versus HS805BB is really worth it? 

[gael langevin]

Yes you are correct, I had bought some HK15338 and did mention some of your warnings in this page: 

http://inmoov.fr/default-hardware-map/

HK15338 (25kg torque, fit perfectly, needs resistors, reversed polarity)

Round potentiometer is similar to the HS805BB (at least the ones I had bought)

The metal end stop can be extracted with a plier while applying small rotations, the gear should be held in a vice.

Another warning I should mention is that the small motor gear becomes loose on the motor shaft if too much torque is applied after a while.

I would recommend not using the HK15338 for the omoplate servo.

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

--
You received this message because you are subscribed to the Google Groups "InMoov" group.
To unsubscribe from this group and stop receiving emails from it, send an email to inmoov+un...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/inmoov/a1fdbc9d-e120-45ad-ae72-d0432bf5ebf2n%40googlegroups.com.

[MAURICE GLYNNE]

Gael,

Please can you clarify:

Assuming I first follow your guidelines to reverse the HK15338 operation in the MRL config.

What is then the potentiometer wiring, straight  thru or reversed for:-   

a) "normal" HS805BB behaviour 

b) "reversed" HS805BB behaviour.

Thanks

Maurice