Issue with Pin-slot and Vertical Slider
Please attach your model. Open in Fusion 360, select the File menu, then Export and save to your hard drive. Attach in a reply post.
John Hackney, Retired
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You had an error in the Pin and Slot joint at the disc connection. I broke the link to your one external file to make it so I could send a F3D file back. Model is attached.
Edit: When the disc Slider Joint is in place, there needs to be a .1 mm offset between the surfaces of the connecting Pin and Slot joint.
John Hackney, Retired
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There is a general rule, when applying a Pin-Slot Joint, is to select the Pin first. This is difficult in your model due to the fact the mounting hole in on a Grounded Component and you cannot select a grounded component for your first joint selection. This rule helps to define the Slide motion to match the slot. The video will show you the method around this. You might be interested in my Blog Article and Video on Pin-Slot Joints since you seem to use a lot of them.
If this video and model solves your issue, please mark this post as the "Accept Solution", you can have more than one Accept Solution per Forum post.
John Hackney, Retired
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You must always remember if you use good joint practices and things still do not work, you need to suspect some misalignment in the system. The misalignment, that had to be taken into account on the Pin-Slot Joint at the lift table may be small but in Fusion 360 it is a mile. The value is noted in the screen capture below. Model is attached as an F3D file as I broke the Hook external link.
John Hackney, Retired
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Somewhere in your design process you introduced the small error in dimensions. The way I found it is to add the Joints that are not part of the motion chain first. In this case I took off the problematic Pin-Slot Joint and added the Slider Joint between the table and the stationary post. Next, I decided the two points that I would use for the Pin-Slot Joint and, using the Measure tool, found the very small misalignment between the center of the pin and the center of the slot. I am grateful is was only in one direction! I then simply added it very small misalignment into the Joint Offset.
You asked if you could make Fusion 360 less sensitive, the answer is NO and you do not want to do it even if you could. Precision design and manufacture is at the heart of all machinery and you could never achieve it without the accuracy Fusion 360 offers. I designed machinery, most of my working life, and on a lot of interacting parts the tolerance of fit was in the 0.0001" to make the machine function smoothly.
My advise is to model all your components with a reference to the model Origin, if not right on top of it, and you will have the automatic precision you need.
John Hackney, Retired
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You have to take our time and measure back until you find the place where the misalignment was introduced. It took me awhile but in the video I show you where I found it and how I corrected the issue. I again broke the link to the one external file so I could return it as a F3D file.
Do not forget to "Accept Solution" is this solves your issue, or ask additional questions if needed.
John Hackney, Retired
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