Revolute Mate Connector with Servo Bracket

joseph_fournier

Hi,

I am trying to make a Servo Bracket (attached to a Servo) rotate using a Revolute Mate, but without success. When I only use a Servo Horn and attach it to the Servo with a Revolute Mate, the Servo Horn rotates, as expected. Meanwhile, when grouping the Bracket to the Horn (either in the main assembly or a sub-assembly), the Bracket does not rotate. I have tried several alternatives such as creating Mate Connectors before adding the Revolute Mate, adding a Fastened Mate (instead of a Group) and other scenarios, but without success. What am I missing?

Thank you.

Joseph

brucebartlett

Best to add a link to a public part if posible and share here, just copy url and paste.

My first though is, have you got one of the parts in the assembly fixed? 

joseph_fournier

Hi Bruce,

Thank you for your reply. The Part can be found at the following link. I am trying to make the Bracket rotate 180 Degrees.

https://cad.onshape.com/documents/f4e7a5fad4f3f580220159a6/w/6bc12b90bccf06a029033694/e/61ac57520e9ed0e004cf6db5

Thank you for your help.

Regards,

Joseph

viru

@joseph_fournier , Kindly refer below link document which may solve your purpose
https://cad.onshape.com/documents/56e65af7e4b0044aa6e52e5c/w/681839e7ad2097dd97afa0c0/e/ff117e015a31749b8944f672
Kindly refer below video which may be helpful for giving appropriate constraint.

joseph_fournier

Hi Viru,

Thank you very much for your time and help. There is one detail I do not quite understand in your implementation. Why did you create in the ServoAssembly a Fastened Connector? Also, if one actually clicks on the Play Button of the Revolute Connector (while in Edit Mode), the Servo itself rotates instead of the axis of rotation. How could I change this? Finally, how can I change the actual degrees of rotation without having OnShape automatically re-positioning the Servo? I would like to have the Bracket move parallel to the Servo instead of perpendicular to it.

Thank you again.

Joseph

viru

@joseph_fournier ,1) Previously part 1 is away from origin and I wanted to place near and symmetric to origin. Therefore i used fastened 1 mate for fixing part 1 with origin. You can also use "fix" option available after right clicking on part in place of fastened mate if you created parts in center.
2) In servo with bracket assembly i have given fastened mate between part 3 of servo assembly and part 2 of bracket with horn assembly. Therefore I haven,t use play button in edit mode of fastened mate.
3) If you want to change then give fastened mate to part 1 and part 3 in servo assembly and revolute mate between part 2 and part 3 in servo with bracket assembly. You have to give revolute mate limit value. Here you can use play button for motion.
4) Kindly place motion video for your requirement for Bracket move parallel to the Servo instead of perpendicular to it

joseph_fournier

Hi Viru,

Thank you for your continued help. I haven't had time yet to implement your suggestion. I will let you know the results once completed.

Thank you again.

Joseph

joseph_fournier

Hi Viru,

I have followed your suggestions. Actually, this is how I had initially configured the Revolute Connector. I am indeed able to manually move the part around the main axis. Meanwhile, upon playing the Revolute Connector in design mode, the Bracket itself does not move, but only the Servo Horn, as it did initially. Shouldn't the Bracket be moving as well?

Thank you.

Regards,

Joseph

jakeramsley

joseph_fournier said:

Hi Viru,

I have followed your suggestions. Actually, this is how I had initially configured the Revolute Connector. I am indeed able to manually move the part around the main axis. Meanwhile, upon playing the Revolute Connector in design mode, the Bracket itself does not move, but only the Servo Horn, as it did initially. Shouldn't the Bracket be moving as well?

Thank you.

Regards,

Joseph

While editing a mate, the play command only animates that one single mate for visual clarity.  It doesn't solve and an animate with all of the other mates at the same time.