I as thinking of the suggestion that Brandon made of making the motor mounts so that they could be removed from the top beam and remounted with good accuracy.
I’ve also been thinking about mounting them to unistrut using normal unistrut bolts.
The mount below is my idea for dealing with this. It can work with both 2x material and unistrut (once the appropriate holes are added to the model), and doesn’t depend on the bolt/screw being super-tight to prevent it from creeping down the beam. I also added a little height so that there can be a bolt through it and have the motor clear the bolt head
it does mean that there would be a left and right motor mount instead of just one part used on both motors
This is similar and I think the answer is somewhere between this and my horrible edit. Also it needs a mount hole for use with Unistrut. I wanted a little more meat to it to screw into on the end for a 2x 4 and a full wrap on the other side incase I want to mount with a “1/4 bolt” through the other direction. Did that make sense?
I don’t want to have the bottom fold, so that it can be used on either the edge of a 2x or on unistrut.
As for holes on the end, I was initially thinking of that, but the question then comes up of needing to weld the end to hold it in place.
I think that just having the flap be long enough to be sure of hitting the back edge of the material will keep things in place, and I don’t think you need a fastener through the end if you have them in the top/back and just use the end flap to keep things from sliding down the beam.
trying to fasten a folded item to two faces of another material is never going to be a perfect fit, so I would say that you should either fasten from the top of the back, but not try both.
send me a PM with the email you use for your onshape account and I’ll give you edit rights on the document
I also wanted to keep the flap smaller to make folding easier (try and keep it clear of the front fold
one nice thing about CAD is how easy it is to tweak something
They are 1/8th inch plate steel laser cut on an industrial laser then sent to a be bent. We had a handful made. I work outside and it’s raining so I can’t test them yet. We are waiting on large quantity quotes.
Shapeways is not a option because they would be casting them. This would not have any consistency in strength.
As designed it is Fast, Accurate, Simple. It’s also custom. As soon as it’s tested we can look forward on the next steps.
Thanks for the quick response. I was on my phone and the photos looked like cast metal, which I see now is not the case! These look great, and will probably be helpful for my folding design in a small shop where I might have to disassemble things from time to time.
How has this mount worked out and have you (or anyone) tried it on unistrut? I’m contemplating my new frame and want to use a unistrut top beam and looking for a good solution to mounting the motor to it.
if you mount the motor to the outside of the (standard) L-bracket you can then use the back side of the motor mount to hold the motor firm against full height unistrut.
The L-Bracket slips underneath and can be bolted through with 2x 1/4"x2.5" bolts, using doubled up washers to keep everything from sliding around and standard 1/4" unistrut nuts (or the included nuts, it doesnt matter, nor should the orientation of the unistrut.
This keeps the motor body against the unistrut cross bar and has resulted in 0 flexing here.