Need some advice for speed and feeds

LowRider CNC Advice
1

I finally decided to surface my spoil board on my LR4 which is MDF 2” x 4”. I bought this 1-1/2” carbide bit on Amazon.
https://a.co/d/0gdkstrV

I have a Carbide3D spindle. I am using MillMage.

I did set entry to low 10°. I started out at 1mm depth but I think I was way too slow on the feed. I was like 200 mm/min. LONG job.

I also thought being so big I set RPM to about 11,000.
Because of a dumb mistake I need to take another 1mm pass to fix the mistake.

Any tips appreciated! Thanks

2

I run my planing with a 16mm endmill at 8000mm/min, everything else burns the wood and the endmill, because there are no chips to evacuate the heat otherwise.

3

What RPM? makes sense… :+1:

4

Low-ish. :smiley: Just dial it down until it sounds wrong and then go up a bit again. I can change the speed digitally so I am not sure where I landed at in the end. :sweat_smile:

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5

Short update. Based upon @Tokoloshe feedback I really sped feed up a lot. I feel the MDF just turns to powder and just not a lot of power to shear. What I did realize way too late was Ryan offers a longer dust skirt!! :joy:
I of course did not pay attention during the job the realize the area of the machine was completely covered with MDF dust! OOOPS!! But cleans up easy.

So going to print the longer skirt today.

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6

Yeah, I did bug him quite often during the beta until he made one. :grinning_face_with_smiling_eyes:
The printed parts kits I sell include both lengths and two lower dust shoe parts, because I always swap them when using 1/8 or 6mm endmills and know how useful it is. :slightly_smiling_face:

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7

Good idea. I’ll have to print out a second dust shoe and longer dust skirt.

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