I think we need to see how close we are in agreement before spending too much effort. do the first one or two and letās see if people agree that these diagrams are good and how far we agree on the design.
I think we still have disagreement on if step 7 is two crossmembers or one and one optional (which will affect squaring in step 9)
and then step 12 is still hot disagreement as to what to do for the non-adjustable version
the more Iām thinking of it, the more I think the answer to an all-wood top beam setup is simply to lay the beam down. With the edges of the top beam support 88 inches apart, thatās only 16 inches on each side thatās unsupported, not a lot of leverage for the weight of the sled to work on.
This would eliminate any need to drill the long way through a 2x4
I donāt think the difference is stiffness will matter, this would put the weak direction of the beam in the direction of gravity, but it would put the strong direction in the direction of the chain forces, I think itās pretty much a wash.
Laying the beam down does make it easier to construct, but the horizontal chain management arrangement needs all the space that the wide face affords. The two take-up sprockets both pull toward the center and need the tail end located out of the way.
by the way, I have no problems with you eliminating all the original text, data block in the bottom corner, and border stuff.
That is just there because itās the easiest way for me to export the different views out of onshape. donāt put any effort into preserving that stuff it it adds any complexity to your workflow
hmm, in the cut list we have room for an extra 3.5" square block (and if we are laying the 2x4 down we could shorten the arms a couple inches to give us room for another one), would it be easiest to use that for anchoring the chain management?
also remember the idea of using weights and something to guide the weight holder behind the workpiece, that would eliminate the need to anchor the stretchy string
Also, if anyone thinks that things would be clearer if a different angle was used, let me know and Iāll change it (and if some angle views arenāt useful, feel free to remove them)
That looks great. BTW, If you have a linux machine or the linux subsystem in Windows 10. THere are several cli PDF conversion utilities.: pdf2svg and pdftocairo
pdftocairo gets installed from the poppler-utils package and can do a number of conversion including SVG. example: pdftocairo -svg step-1.pdf step-1.svg.
If you want to convert entire directory of PDFās, then do something like this from the bash shell. for f in *.pdf; do pdftocairo -svg $f; done
thanks, I was using inkscape to do the conversion, and itās converting the .pdf to a svg + a bunch of .pdg files (in the pdfās I have shading turned on.
It was part of the problem with going back and forth between applications⦠Iāll eliminate the border and title block and save as pdf from visio. Fontās should be fine from there.
one other thing that we should add to the instructions, while I show doing both
sides at once, any time a measurement should be done twice, the same pieces of
wood should be used each time
so in step 1, you use one blue and yellow piece, attach the block, then use the same blue and yellow piece to position the second block.
that way it doesnāt matter what errors there are in the cuts, everything is
going to be the same on both sides. This is why everything references the
factory tops of the legs.
The eception to this is the rear legs and their spacers where you use the leg
for that side to position the spacer, and are referencing the bottom of the
front leg.