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High performance cutting on DIY CNC machine ||Star challenge v2||

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If you haven't seen the original star challenge video you can find it here
• High Performance Cutti...
I made it to improve the material removal rate quite a bit. For the first star I reached about 120 cm³/min. If you also want to do the star challenge you can find the files here. Just make a video of it and post it in the comments. Doesn't matter how fast you and your machine can do that!
drive.google.c...
Cutting data
Spindel speed: 10000 1/min
Feed: 4500 mm/min
Cutting depth (Ap): 10 mm
Side engagement (Ae): 4,5 mm
Calculated MRR: 202,5 cm³/min
Spindlepower for that cut ca 2,5-3 kW
Time for the roughing pass ~ 28 Sekunden
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The endmill I used in the video can be found here. This link is NOT an affiliate link.
www.gladium-to...

Опубликовано:

27 авг 2024

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Комментарии : 24

@AlexCNCen 4 года назад

I want to wish you all merry Christmas and a happy new year! Cutting data and more information can be found in the description. If you also want to try that Star the files can be found in the description!

@desertkun 4 года назад

That performance caught me off guard. Very nice.

@TomokosEnterprize 4 года назад

Great to see you again Alex. Seasons best to you and yours my friend.

@davidewing9088 4 года назад

Learning with every video.

@annaarz5353 4 года назад

That spindle motor is HUGE! well done!

@zidwid 3 года назад

WOW! just that....just WOW

@arnljotseem8794 4 года назад

Very nice. Merry Christmas

@RaptorMachineToolCo 4 года назад

Excellent Alex.... 30 taper? Homemade tool holder. Cuts great !!, merry Christmas!! 🎄

@AlexCNCen 4 года назад

The spindle takes BT30 tooling. The spindle is self made but not the holders. They are bought :)

@hardcry4159 4 года назад

Amazing Alex! Thank you for showing and talking with us in English. I've got to say do you have a link for the BT30 spindle? I'm in the process of building a granite plate CNC mill and you have given me much needed inspiration. :D

@erodrigolopez 4 года назад

Wow 🤩!!

@deefadale 4 года назад

Wow!

@KravchenkoAudioPerth 4 года назад

I was wondering if you did an upgrade when I saw a longer spindle shaft! Very impressive. Did you modify your machine in any way to achieve this great cutting performance? I am certainly impressed!

@AlexCNCen 4 года назад

Have you watched until the very end? There is the solution ;) More details about that in an answer of another comment. Nothing else is modified.

@KravchenkoAudioPerth 4 года назад

@@AlexCNCen I did watch it to the end. Impressive that with the stronger higher torque motor you had even better cutting performance and finish on the material.

@jirij 4 года назад

That thing must weight a ton! I seem to remember your machine being the moving gantry type - do you have any counterweights or can the X beam really hold all the weight?

@AlexCNCen 4 года назад

I have tried the additional weight of the new motor with some steel plates before. Worked without any problems. No counterweight or so needed. But indeed it would be better if the motor was sitting more over the beam and not that much in the front. The motor weighs 18kg. So only about 13 kg more than before. The whole machine should be around 300 - 400 kg.

@MattRus 4 года назад

without the counterweight, you will notice poor surface finish when cutting 3d shape, like chamfers at angle. They will look weavy. I partly resolved the issue by adding springs to hold the z-axis in place. Better surface finish but still not perfect.

@AlexCNCen 4 года назад

@@MattRus I have done 2 identical parts with 3D shapes. One with and one without the additional weight. There where only minor differences which are hard to find if you don't have the comparison piece. That's ok for me.

@MattRus 4 года назад

What spindle motor is that? More info would be nice.

@AlexCNCen 4 года назад

That is a Fagor FKM64.30 It's not a dedicated spindle Servo but works great. Has about 3.5kW continuous power at 3000rpm with 11.2 Nm. But can be overloaded quite a lot for shorter durations.

@MattRus 4 года назад

Thank you for the reply. I have very similar atc setup with shaft and 2.2kw spindle as a motor. Planing to upgrade the motor with chinese 3kw spindle. You gave me an idea for much better motor but the price is 3x higher, i am very tempted, but i think i will try the 3kw chinese spindle first. What gear ratio you using on your new setup? With that ratio, you getting less torque (but still plenty). Isnt htd belt too loud?

@AlexCNCen 4 года назад

@@MattRus The gear ration is 1:3,46. So I get about 10300 rpm when the motor runs with its nominal rpm of 3000. The HTD belt is ok at those speeds. It is noticeable but not to loud. Specially not compared to the 2,2kW chinese spindle before ;)

@annaarz5353 4 года назад

well done my friend