Assembling SmartMini boardsView Instructable »
If you want a rough and ready speed calculator using the automatic version of SmartJointer (see the second Instructable) just multiply the timber width by 0.75.So, timber with a width of 60mm would take about 60 x .75 = 45 seconds for one set of pins or tails. You can, of course, double up and cut two, three or even four pieces (depending in timber thickness) in one pass.Word of advice: always use a backer. I hate tear out!
SmartJointer: full automatic SmartMini-based box jointerView Instructable »
SmartJointer: fully automatic SmartMini-based box jointer
I started with two bearings but found there was a little too much play for my liking. Three might do nicely. Mind, my first version used a motor at the end, a length of 10mm studding as a lead screw and a drilled and tapped acetal block as a nut - maybe that introduced the waggle!This weekend I will do an Instructable for the automatic push/pull part ("SmartPusher"!) and that uses only two bearings because it is a straight horizontal movement - not carrying any vertical weight subject to gravity!
Perhaps I have watched too much Norm and Matthias! Probably they leave off the safety stuff to make the videos clearer.On the other hand, you do have dado cutters which are very much frowned on by the powers that be over here - we just have to take more cuts.Personally, having spent a career employing people, I am very keen on health and safety regulations - I don't want anyone's injuries or death on my conscience.
Many thanks for that - you have cheered a man's heart!I did think of making a flat-pack version with the plywood cut to size and all the holes cut/drilled on my CNC router - a fantastic toy I treated myself too when I set up the workshop thinking I was going to retire (fat chance!). The locating holes for the guide rails and linear bearings are pretty critical or everything will bind up - a major concern with CNC design - as I know from experience!
Yes, I did one - and I may resurrect it. I found a photo which I enclose.Essentially it took the "gantry" part of SmartJointer (the bit with the work holder, guide rails, motor, back etc) and allowed it to pivot on a bolt through the back support. The end was extended to locate with a dowel pin into pre-drilled holes providing all the standard dovetail angles.A straight router bit was used to cut the pins and a dovetail, cutter used to cut the tails. Again the work holder moved between cuts. The electronics is the same - just a different algorithm to work out the cuts.It worked fine but was bigger than SmartJointer and was best used on a router table.Obviously it can cut box joints as well as dovetails.
SmartJointer: SmartMini/Arduino controlled box jointerView Instructable »
Hand-held remote controller for Arduino etc.View Instructable »