The quality of wood processing (and not only wood) depends on the “sharpness” of knives and not only the quality of processing, but also the safety of work on such machines. In my "arsenal" there are seven such machines. Each time, "search" where to rend tired. Yes, and especially you will not find it. The sharpening process itself does not tolerate "speed", the knife can simply be "burned". It takes a lot of time for this and it is advisable to do it at home. The machine must be automatic or at least semi-automatic. In order to remove the maximum of tedious work from the machine operator.
As always in my practice I apply, first of all, to make of "what is". Minimize costs, while the quality of work, the future manufactured product should not suffer.
As a result, we got such an “aggregate”. Satisfied with the work of the machine, the problem of sharpening knives, removed.
The power engine borrowed from an unnecessary pumping station, about such a modification.
Its parameters are quite acceptable for this machine.
The machine frame was welded from a profile pipe (20x40) and screwed with screws to a wooden base, thereby increasing the rigidity of the structure. Which is very important. A guide profile of the same size was welded in the center. It serves to guide the movement of the carriage of the grinding unit.
The base of the grinding unit is made of powerful metal from railway linings for rails. Found on the farm.
To him, after appropriate processing, he installed a guide plate on which he fixed the electric motor at three points. One of them is adjusting. The guide plate, relative to the support plate, is mounted movably on two piston fingers from a Muscovite, the rollers (guide shafts) exactly fit from the UAZ gearbox. To feed the grindstone to the part (knife), there is a screw with a fine thread.
The entire unit moves along the rails on closed ball bearings, 4 support and 4 rails. This must be done very accurately, since backlash is not acceptable here.
The emery itself (stone) is plate-shaped, which allows sharpening according to the rules for sharpening such knives.
The knife is fixed in a special device that can change the angle of sharpening. For a planing sheath, it should be 45-60 degrees. To attach the knife to the device, I applied canopies from the furniture set.
Below are two adjusting screws for adjusting the knife, when sharpening, by the gap between the knife plate and the grinding stone.
The fasteners turned out reliable and not expensive.
After adjustments, turn on the emery and begin to move the unit along the guides, from one end to the other bed. In doing so, gradually tighten the feed screw. But do not overdo it, otherwise you can burn the knife.
Naturally, this process takes a lot of time and it was necessary to automate this part of manual work. Found in stocks (as many as three) an electric motor with the desired speed. Invented the "washing" from 220 in. (there he has 127 in.) and most importantly, reverse engine switching. Set the limit switches and the pin,
Shaft, to move the carriage, I had to write out a set from the Chinese, which completely suited me. The set consists of a shaft (60 cm), bearings, a self-centering coupling, a guide sleeve.
It turned out here is such a device. Semi-automatic knife sharpening, for planing tools.
Now it remains only to tighten the feed screw.
That's about it, the problem is removed. I can answer in more detail personally.
You can "bomb".