Hello @kgreaves81, Send a warranty message on our Contact Us page and we'll get it sorted out!

Hi Jeremie thx have sent message, should the shoulder joints be tighter than other joints to move by hand when doing cal. As they did seem tight but had nothing to gauge them too. Guess they should move freely by hand, is there any adjustment needed when doing cal on shoulder servo,s Thx KG

We have seen tight shoulder joints on JD in the past. There's not much you can do in terms of calibration but @Aislinn should be able to fill you in on the rest of the details when she gets in tomorrow, thanks!

If they are tight, please ask for instructions on how to modify the shoulder holes to loosen the servos. If you do not modify the shoulder holes then the replacement servos will burn out again.

Hi DJ please can give instructions to loosen shoulder joint as both were tighter than other joints during cal, and I don't want to loose another servo, also what controls location of servo position in body and is a bit of lube worth a try. Guys many thanks for the quick response, and do you have UK spares supplier . KG

just to update have removed body and checked free rotation of left servo by hand, it is significantly tighter when in the body with the retaining screw fully tightened. when removed from the body the servo moves freely. so will need to adjust fit for both servos to prevent further servo burn out of replacement right and left thanks

KG

DJ Just done a few checks on the fit of shoulder servo mounts.

Internal diameter of hole in body 13.12 /13.06mm

Diameter of servo mount is tapered an increases in size 13.06/ 13.43mm max with interference fit to body bore. This results in the servo mount locking when tighten down by servo screw. To solve the issue you need to tighten the tolerance on the servo mount o/d. The scraping of the bore is only a repair but is not the root cause of your quality problem. Hope this helps solve this going forward. In the mean time I need to get my JD up and running Thx KG

That is correct. We have repaired the issue with the body in the injection mold process many months ago. The unit you have is from first generation of that mold.

There are thousands of JD's out there we found out about that issue immediately and resolved it. Sadly there is still original stock on shelves from some retailers.

That's fine but the unlucky ones like me end up with a JD with no arms, can you get the spare parts in the post so I can get him built also it would be good to put a note in the build instructions to check the shoulder servos for tightness or locking during assembly So far there is no way of getting spare parts in the UK that I know of Thx KG