How to use the Motor Mounting Feature for FRC on Onshape?


Hi guys, I’m trying to use this tool to add the NEO engine holes. but for some reason the tool is giving an error. Is there something wrong I’m doing or do I need to do something else?

After taking a quick look, haven’t used the feature before, try adding a part as merge scope?


This is what I did and it seems to work

In the spirit of teaching someone to fish, when you see a red title in your operation, you can hover over it to get some information about what is wrong.

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In this case, I’m not sure if “No target parts selected for hole” leads a novice directly to needing to provide a part in the Merge Scope field, but it’s a pretty good clue. Be sure to check those error messages on this or other operations. They might help you solve problems.

In this particular case, I can create a different error with Motor Mounting. If I create Part 1 by extruding a rectangle “up” from the Top plane, and then I use Motor Mounting and choose an Origin point on the sketch used to create the part, I get an error that the script can’t find the right face to initiate the Motor Mounting edits. This is with the desired part in Merge Scope.

What you need to do in this case is use the “Flip Extrude” arrow by Merge Scope to flip the direction of the extrude so the script can “find” the part.

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Thank you guys!

Im getting a select a pattern axis error

I don’t recall seeing that error. Screenshots of the way you’ve filled out the configuration panel for Motor Mounting as well as the part you are trying to apply it to might help someone help you.

I can generate the same error if I try to create the Motor Mounting pattern by making the Origin the center of a circle with a larger diameter than the center (boss) hole the Featurescript will cut for the VP. I’m not sure why that is happening. I’m not the author of Motor Mounting.

What worked for me is to make the Origin either a point on a sketch on your plate face (don’t start with the hole in the plate, let MM do that), or make the hole diameter smaller than the VP boss hole (e.g. 0.25 inches) and use the center of that hole as the Origin. You can use the Boss diameter adder to make the boss hole larger if needed or you can extrude a larger hole in a separate step if needed.

Thank you so much

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