The outside edge of the 3/4 inch cutter runs 3 times faster than the quarter. Inch. That would be why it was so much smoother not because it was straight
Would love to see more videos testing spiral bits vs straight bits vs 3 flute spirals vs “O-flute” bits (normally recommended for cutting acrylics and plastics)
I was about to ask about comparing upcut to down cut, as my instict says you want the chips to be pulled toward the tool for better extraction. Then i looked at your other videos and you may have already answered that point. So I'll check out the other video.
Sadly it's a bit more complicated than that. For simplicity sake, upcut v. downcut is more about the quality of the show face rather than specifically about extraction. in some situations the compacted dust can act as a clamp
As with any adjustable speed router, the bit diameter and number of cutting edges (flutes) dictates the proper speed setting for the desired feed speed. If the speed is set too high and you feed (move) the router too slowly you get heat and burning. If the speed is set to low, you either have to feed very slowly or you bog down the motor and get poor cut quality.
Proper speeds and feeds are critical for any machining operation. The thing I find strange about woodworking is this information is not as easy to come by which leads to trial and error along with many subpar results until the proper combination is found. Good job on providing some improved insight but a more rigorous effort on the topic would be helpful.
You're absolutely spot on. Shaper does off some general guidelines, which is good for a starting point. Each bit is different, each species has different properties, and keeping track of it all is a job in and of itself. I don't claim to be an expert machinist at all, but I'll continue to share my experiences as they come up
The main reason to slow the speed down would be to slow the larger radius bits down. Equally the faster speed would be used for the smaller radius bits
Isnt the final result of the bottom cleaner nicer because you cut against the grain here, and the others are straight with the grain?
The outside edge of the 3/4 inch cutter runs 3 times faster than the quarter. Inch. That would be why it was so much smoother not because it was straight
An oversight in my explanation, but this is what the comment section is for. Appreciate you chiming in
Would love to see more videos testing spiral bits vs straight bits vs 3 flute spirals vs “O-flute” bits (normally recommended for cutting acrylics and plastics)
I was about to ask about comparing upcut to down cut, as my instict says you want the chips to be pulled toward the tool for better extraction. Then i looked at your other videos and you may have already answered that point. So I'll check out the other video.
Sadly it's a bit more complicated than that. For simplicity sake, upcut v. downcut is more about the quality of the show face rather than specifically about extraction. in some situations the compacted dust can act as a clamp
As with any adjustable speed router, the bit diameter and number of cutting edges (flutes) dictates the proper speed setting for the desired feed speed. If the speed is set too high and you feed (move) the router too slowly you get heat and burning. If the speed is set to low, you either have to feed very slowly or you bog down the motor and get poor cut quality.
Shapers come with upcut bits
Proper speeds and feeds are critical for any machining operation. The thing I find strange about woodworking is this information is not as easy to come by which leads to trial and error along with many subpar results until the proper combination is found.
Good job on providing some improved insight but a more rigorous effort on the topic would be helpful.
You're absolutely spot on. Shaper does off some general guidelines, which is good for a starting point. Each bit is different, each species has different properties, and keeping track of it all is a job in and of itself. I don't claim to be an expert machinist at all, but I'll continue to share my experiences as they come up
Good catch. Blunder on my part
No problem thanks for the content.
The main reason to slow the speed down would be to slow the larger radius bits down. Equally the faster speed would be used for the smaller radius bits
I failed to mention that slower speeds are necessary for materials like nonferrous metals. But that's a topic for another day.