where is this post mounted on the sled?
In the same two locations that the original L Brackets were.
Kind Regards Stuart
having the chains pivoting around those points is effectively the same as stock
(where the pivot is the linkage of the chain)
you still have the really hard math and all the accuracy problems of the stock
kinematics.
Unless I’m misunderstanding something (a diagram may clear that up)
Dlang,
I will have a bit more of a think through it and see if I can come up with a drawing to explain a little better which should shed some light.
Stuart
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I think that what you’re proposing is, connect the 2 chains to the same point above the router, which would cause a pendulum.
If you look around the forum you will allready find some pictures of other people who thought of this.
Dag83,
No I am not suggesting this. There will be two anchor points. I will try work through my idea and present a drawing if I think it will work.
Stuart
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The tips of the chains (wherever the chains attach to anything on the sled) should be free to move in a concentric circle around the router bit. If the tips of the chains don’t move at all in relation to the router bit, that is equivalent to the “stock” setup with brackets. If the chain tips move, but not in a concentric circle around the router bit, I suppose there is a chance it can be an improvement over the stock setup but it is not triangular kinematics and would require different math. Triangular kinematics only works if the chains themselves always point at the router bit (which means every point on the chain between the motors and the router moves concentrically to the router bit).
I too am having a difficult time picturing what you’re proposing. Can you draw it up for us (even a crude sketch)?
Sounds interesting though!
-Logan
I am about to finalize my design for a metal sled and wanted to have the laser cutter cut the hole pattern for the ring mounts so that it is centered from the get go. @bar, Are the designs in the Onshape site below the final dimensions for the ring that will be available with the next batch? I was thinking I would download the “alignment template” and import it into Autocad to place the holes for the laser cutter.
Thanks!
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Which leads to my next question, now that I have taken a good look at Onshape’s site… is there any way to download a DXF (or even a dwg) of the alignment template?
I don’t mind redrawing things, but that is likely to introduce errors if I measure items wrong or otherwise place them differently than the design.
Thanks!
yes, you right click on the sketch (in the upper left box) and that lets you
export os dxf/dwg
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do I need an account to do that? When I left click all I get is “view Properties” and “zoom to fit”
Looks great, can’t wait to get my hands on one. Keen to hear more about the testing and how results compare to other linkage kits.
in the box called ‘features’, find the sketch (one of the things with pencil icon to the left) and right click on that.
In general, you should go ahead and create an onshape account, you can view things without one (if permissions have been set to allow it), but there is so much more you can do once you are logged in.
Not sure I am seeing the same thing as you. Here is my Onshape view. I went ahead and got an account.
This is the first time I’ve used Onshape, so please excuse my ignorance. Here is what I see
go two tabs to your left and try again
yup, still not seeing a box called features when I open the “Flat pattern of track” drawing. Also, that tab is not the pattern for where the mounts would hit the sled as that is the flat template for the ring itself before it is bent. But perhaps that is not the tab you are referring to?
if you go to https://cad.onshape.com/documents/fddeba2635a9f73809f6d0b7/w/0aff69bb8aa952e2868d1275/e/f883ecc4694593478f1b2f0e and right click on sketch 2 you can export it as a dxf/dwg
however, all that is is a set of concentric circles that you use to line up the ring with the center of the bit. Anything that can produce a set of circles will do the job.
Onshape to dxf dwg etc how to video
Just right click on the tab.
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there it is! Thanks @clintloggins!!
@dlang I am hoping to lay out the mounting holes for the ring mounts. If I am interpreting “Alignment Template” (the drawing, not the model. 6th tab from the left) properly, the six holes for each of the tabs should be the mounting holes for the brackets that hold up the ring. I am hoping that @bar has a moment to chime in and verify this.
Thanks for everyone’s help on pointing me toward exporting the file as a .dwg
I love the support available through this forum
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the idea of the guide is that you center the ring on the router and then drive
screws in place, you don’t need to prepare holes for it
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