Everything would be fine, but the disassembled old window frames in cross-section have a very complex profile, I will say more, they all have no parallel edges. Cutting them to the correct parallelogram led to the result that a bar of 20 by 20 mm was obtained with the initial dimensions of almost 50 by 50 mm. Therefore, I decided to minimize losses and bring the bars to a figure that has a rhombus or a truncated pyramid in cross section. And then another question arose how to glue them so that they would not leave. The simplest thing is to make a groove or hole for them in the dowels. There is another option to buy a very expensive milling cutter and no less expensive milling machine to it and reducing the bars, make them fold like a lining. But no, this option is not suitable for used material with a bunch of nails, putty and paint.
Turning my eyes to the existing models, I realized that the cheap ones had many shortcomings (usually large backlashes) and did not work out at the moment, and those without these defects were not too expensive for such experiments and decided to make their own version, as always with minimal costs time and effort.
Going from simple to complex. In the beginning, I decided to attach an aluminum profile to the grinder, which would set one size for all the bars, but this was not enough. The design was flimsy and the disc made a crooked groove.
On this I paused and filmed a video question on YouTube
It is clear that I received the answer due to 15 subscribers and did not receive a single viewing. But in the morning, a decision was born in my head how to improve the unit without buying anything new, with little "blood" without machine tools and welding.
For starters, I strengthened the mechanism by making cuts in it and without cutting the profile, bent it with the letter “P”
It remains for a little to come up with a mechanism for raising and lowering the platform that would limit the height of the groove relative to the workpiece. The difficulty was that I was going to fasten the guide to the bar, because I thought that the Bulgarian would try to "run away" or tear out the bar. But it turned out that the saw blade is very sharp and it enters the pine like oil, you still need to fix the workpiece and you need to hold the angle grinder with only two hands so that in case of jamming it would not be thrown to the “operator” Therefore, I was distracted for a while and gave birth to this their new clamps "dinosaur" about which also shot a video. But we were distracted.
When I realized that the grinder doesn’t tear even like an ordinary milling cutter, I decided that any bracket attached to my “P” shaped holder would do the trick, and those “slides” that I wanted to use as guides just came in handy, I just folded them palam and fastened with a prishepka :)
This at the moment was quite enough.
And how would you improve this device?