I actually run TB6600s, which, as far as I know, are actually worse that the little 2209s the Jackpot runs with. I did up the current on the X driver though (which you can also do on the Jackpot if you need it). But that should not be a problem, I cut aluminium with my MPCNC before with underpowered steppers. There is a video somewhere on my channel as well. :D
@@HaWiWe ok I was just asking, I haven’t tried much aluminum on my primo or lr3. Mine are all set at the stock settings. I will have to get some time to dig into the forum better.
The key to good, long bit life is to keep the bit cool. The primary way to keep it cool, is to use proper feeds and speeds, so the bit will move fast enough and bite deep enough, that the friction of cutting gets carried away by the nice, big chips that are being excavated. Spinning too fast (too much speed), while advancing too slowly (not enough feed) allows increased friction to not only heat up the material, but also the bit. A hot bit is a soft bit. In addition to feeds and speeds, cutting aluminum can be aided by misting with iso alcohol. But with the right feeds and speeds and a nice sharp bit, the misting is not absolutely necessary. Besides all this, the bit's lifetime is also affected by what kind of steel it's made from, and what kind of coatings have been applied. So there is no one answer, but when done right, a bit can last longer than one might think!
I did destroy two if the 3.175mm ones with my first plates, one broke while drilling (which is never a good idea with endmills so I bought some drills), the other one was just dull after both plates. The plates in the video were then cut with my 6mm aluminium endmill which has cut quite a bit of aluminium and does not show any signs of wear. So it really, really depends. :D
LR4 cut videos:
* Doug’s LR4 Beta MDF pocket cuts - th-cam.com/video/dBgvDj8Z8W8/w-d-xo.html
* Jonathan’s LR4 RC2 Cutting Plywood - th-cam.com/video/dUwLgUTMwFw/w-d-xo.html
* Philipp's LR4 Beta vs. Aluminium (8.2mm DOC Trochoidal!) - th-cam.com/video/mKKdrA8FmOA/w-d-xo.html
* Doug’s LR4 Beta hardwood 3000mm/min and 12mm depth of cut - th-cam.com/video/Fd-oGQ4v_GA/w-d-xo.html
* Philipp's LR4 Beta Test Box for a Bullitt Cargobike - th-cam.com/video/tKNTZqMreGU/w-d-xo.html
* Philipp's LR4 Beta Test 33 second CNC Drag Race - th-cam.com/video/xX14s60RbsI/w-d-xo.html
Great! Thanks for the info!
You are welcome. :)
Awesome! Cool video and cut specs!
Das sieht echt super aus. Ich überlege gerade ob ich das mit der LR3 auch schaffe oder aber Wasserstrahlschneiden lasse
Ich habe das erste Set Platten auch mit dem LR3 geschnitten, brauchte ich ja für den LR4. :D Geht auch easy. :)
Thanks for the video !
Did you have to adjust the stepper current?
I actually run TB6600s, which, as far as I know, are actually worse that the little 2209s the Jackpot runs with. I did up the current on the X driver though (which you can also do on the Jackpot if you need it). But that should not be a problem, I cut aluminium with my MPCNC before with underpowered steppers. There is a video somewhere on my channel as well. :D
@@HaWiWe ok I was just asking, I haven’t tried much aluminum on my primo or lr3.
Mine are all set at the stock settings. I will have to get some time to dig into the forum better.
Awesome job! And congrats on beating me to Aluminum with the LR4 🤣
Haha, you gotta give me something... :D
How long does a bit last cutting aluminium?
The key to good, long bit life is to keep the bit cool. The primary way to keep it cool, is to use proper feeds and speeds, so the bit will move fast enough and bite deep enough, that the friction of cutting gets carried away by the nice, big chips that are being excavated. Spinning too fast (too much speed), while advancing too slowly (not enough feed) allows increased friction to not only heat up the material, but also the bit. A hot bit is a soft bit. In addition to feeds and speeds, cutting aluminum can be aided by misting with iso alcohol. But with the right feeds and speeds and a nice sharp bit, the misting is not absolutely necessary. Besides all this, the bit's lifetime is also affected by what kind of steel it's made from, and what kind of coatings have been applied. So there is no one answer, but when done right, a bit can last longer than one might think!
I did destroy two if the 3.175mm ones with my first plates, one broke while drilling (which is never a good idea with endmills so I bought some drills), the other one was just dull after both plates.
The plates in the video were then cut with my 6mm aluminium endmill which has cut quite a bit of aluminium and does not show any signs of wear. So it really, really depends. :D
Thank you both for the answer. @design8studio @HaWiWe