Asked — Edited

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Can I just buy the part I need from somewhere? I have wasted more time and energy and I'm ready to throw the thing out the window trying to print the part I need at the right size.


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use a professional printing service if you need it done at a perfect size without the hassle. it does cost more but it is a trade off in time spent trying a couple times. is popular but lots of other people offer this service.


Please provide clarification to this topic or the thread will be deleted. What can we help you with?


If you want to buy parts for JD, or a whole JD, click on Products on the top of this web site.

JD whole kit:

Individual body parts:

Sensors (includes JD's head)



I think JMimpy is probably still trying to create a JD neck from this thread:

The problem I had when printing the neck was finding the right servo, which ultimately lead to my need for the micro HD servo from EZ-Robot because the sizes of servos and spline (gear head) vary widely in servos and finding the right servo elseware or modifying the .stl to fit a different servo is difficult.

But, the entire neck by it's self is not something currently offered in the store.

If we want a new neck we have to either buy the entire JD head or buy the HD micro servo and then print the neck parts to assemble our own.

I think it would be cool to have the neck that you could buy in the store assembled as an individual part and maybe have alternative lever attachment with a male EZ-Bit that you could swap out and have smaller lever for sensors.


Yes I am STILL trying to print the neck piece. I can get it to fit in the gears going to the head, but can't get it to fit the gears going to the servo. I looked at the products to buy and to get the piece I need I have to buy the whole head. I am beyond frustrated. I have printed over 20 of these and none are working. I don't know what else to try. :(


@JMimpy... Are you printing in PLA or ABS? ABS works better... This is what I did... Heat the part up where the servo horn would go with a heat gun (carefully)... It will now be pliable enough to push the servo spline into the part...


@Jmippy , just use a drill bit and bore out the hole and use a tiny bit of epoxy or even thermal plastic like morphit. as long as it is physically correct you can work around fitment onto a servo. Lots of 3d printers are not calibrated well enough to print the spline to press onto a servo perfectly.


Even some high temp hotglue could set a piece of plastic onto the servo spline.


Thank you I will give both those suggestions a try.