Better Surface Finishes on Pocket Floors! Testing Different Fusion 360 CAM Toolpaths.

Who doesn't want better floor finishes directly from a machine? Let's talk about CNC machine considerations, toolpaths in Fusion 360, 4 different types of machining strategies, and finally their roughness average based on readings from a profilometer! Use this video to help you decide how to approach your part, what matters most, and how to maximize your machine tool!
00:00 Intro
00:18 Machine Design & Toolpath Considerations
01:10 Feed Optimization in Fusion 360
01:53 Roughing/Adaptive Strategy
02:47 2D Pocket
04:28 Horizontal
06:45 2D Contour with/without Ramp In
10:28 Profilometer & Ra Values
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Links for this video
Starrett SR160 Surface Roughness Tester: bit.ly/sr160
Surface Roughness Comparator Blocks: amzn.to/34VeVDM
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Reach us / CNC Info:
Speeds & Feeds: provencut.com
Download Fusion 360: www.dpbolvw.net/click-9255839...
Online Fusion 360 Training: bit.ly/LearnFusion360
Hands-On CNC Classes: www.nyccnc.com/events
SMW Products: saundersmachineworks.com/
CNC Resources: www.nyccnc.com 5 Reasons to Use a Fixture Plate on Your CNC Machine: bit.ly/3sNA4uH

[@dtsnjsn6101]

as a self taught and relatively young machinist, it’s super satisfying to see John cover things that I already do. Such good validation that I’m doing things right :)

[@HuskyMachining]

imma self taught guy too and I have always wondered why there isn't a spindle rpm optimization too as I have always had more success hitting the spindle override down a few clicks as a endmill came into a sharp internal corner compared to just slowing the feed down

[@texasermd1]

Wow. Cool video and that Starrett SR160 is a sweet tool. 👍🏼👍🏼

[@jackflash6377]

Saw this when it first hit and stashed it in my "next time I need this" memory bank. Today I am pocketing copper and using the 2D Contour as you described gave me an almost mirror finish. I was close with the code I used before but I had plenty of those "witness" marks. Now, none. Thanks John!

[@PeteKoepfgen]

Thanks for the commentary near the end RE: approx Ra (um) you can feel w/ your nail,vs. when you really can't. It gives us a sense of the Ra values.. a feel for it !

[@sateeshum394]

Thank You very much.. You make lot of sense and excellent tip to gauge surface finish..

[@tommays56]

You break down something so complex into nice bite size sections

[@mkegadgets4380]

Thanks for the tips. As some one that lives in the 2D world, I never understand some of the Fusion 360 choices in contouring.

[@darreneck3744]

thanks so much!

[@DarkAeroInc]

Great video John! Now I want to get the one of those Roughness Comparator Blocks!

[@questions702]

what was your axial stock to leave on your initial adaptive for the pockets?

[@damiencordner1195]

On Powermill I use model area clearance with boundary and set my leads and links to 'on surface' off set by 0.1 then finish to 0.

[@ryanb1874]

Good stuff, is the finishing g software utilize constant chip load through the small radius so no shocking is produced

[@joao_ferreira96]

What a sensational video! Thanks! Do you have a video on comparing 3D finishing strategies?

[@marlo086]

How do you show the machine time in the menu on the left?

[@libao4304]

As I remember you mentioned you used Gorpro to film the machining process, how you attach the camera inside the machine?

[@AATopFuel]

Awesome.

[@gredangeo]

You should compare the surface roughness of a floor that has just a basic finish, with the feed lines still in it, vs a polished floor, that was only done primarily by hand with Scotchbrite or something. With that, it should only presumingly looks smooth.

[@TheHalloweenmasks]

How do I select the edges of a pocket? I am trying to create a tool path for a pocket in the side of a connecting rod. The pocket floor will not select either.

[@visionforge1254]

I saw that Tormach 8L you wanted to show off, we getting some videos on that?

[@Peccavi75]

How about parallel? Contour the edge and parallel the middle.

[@bcbloc02]

Interesting to see so what caused those smooth then rough patterns in the sidewalls of the pockets?That leftover deflection from an adaptive strategy?

[@stick004]

John, what do you do with this info after the R&D is complete? Does it become a purchase option on custom work? As in you offer different levels of surface finish for a different cost? Or do you just R&D to find the best finish, then just produce everything at the best finish? Therefore offering a higher quality part than your competitors?

[@madisonrollings1845]

For me it would aid in quoting manufacture cost. You want the best finish for the lowest cost. That first pocket will do for 99% of the work I've done, and would be my standard finish. That 1% where the customer wants an Ra 16 or better finish is where this research comes in, and I know how much extra cost (time) there is. Quality is just a part that meets the customer requirements. Going so far beyond that only adds cost, and fewer customers accepting your quote.

[@piccilos]

That 8L tease

[@zethflores6874]

How many instances of rewatching this video is too many? Asking for a friend.

[@MrNerfornothing]

Is there anyway to make the tool path go diagonally at 45 degrees? At work I use a different cam software that allows it and 45 degrees make the part look super good

[@autokludge]

Hope this helps: kzbin.info/www/bejne/n4DVYqiDg9B9eas use Parallel with a set angle & a geometry boundary.

[@MrNerfornothing]

@@autokludge ah ok thanks. But will it be good at flat cutting a pocket

[@nilfernandez2873]

I don't really understand the rump dow toolpath with a variable anglr in the entrance, if you just want easy chip ebacuation you just make a bigfer radius and that's it but going from a big radius to a small one doesn't make much sense for me

[@igornikitine6020]

👍👍

[@Sicktrickintuner]

Under 30Ra is getting into a polished territory for smoothness

[@automan1223]

Floor surface finishes vary between endmills and can be dramatic...

[@stijndegraaf2003]

O my focking god so that is feed optimisation never knew

[@tcratius1748]

Give it the finger...nail :)

[@DavidtheSwarfer]

Could programming the feed rate as for a 1 flute cutter improve floor finish? There is always 1 flute that sticks out a little more than the others so maybe using it as a 1flute cutter is the way to go.

Generally 2D pocket is the best for speed and result not much worse than 2D morphed spiral horizontal which takes 5 times longer

[@capnthepeafarmer]

I've always had issues using the horizontal tool path on open sections, it always seems to gouge the side wall that it's cutting. As a side note to talking about the head tilt, if you want to completely eliminate the effect of head nod, just use a very tiny ball end mill. It acts like a point cutting tool and is, for all intents and purposes, not affected by nod.

[@kowalskimichael]

Kind of confused...the angle of the horizontal finish makes it hard to see but overall I have to say the first operation with the 2d pocket looks way better than any of there others....the tiny step over contour one looks atrocious for example, even though theoretically may be flatter, it looks horrible!

[@thescantilycladcob]

One year late to say this but you are exactly right, higher radial engagement has always been more favorable when finishing as to reduce the amount of tool lines. This goes all the way back to even before we had mills, when shapers were the only tool available to create square parts the strategy was the same. I use as standard a 90% step over when finishing and the surface roughness can be more attributed to using proper speeds and feeds as well as your choice of tool.

[@Engineer_Stepanov]

Че-то поверхность не того, можно бы и получше фрезу заточить и режим более правильный выбрать.

[@frigzy3748]

нормальная поверхность - 9мкм. Мне такое с моим станком и не снилось. Эти фрезы сделаны из цельного куска карбида вольфрама - в условиях серийного производства их не затачивают.

[@frigzy3748]

сорри - это микроинчи, а не мкм (извращенцы). на видео - tormach, это бюджетный станок начального уровня для хоббистов. Поэтому даже так - все равно неплохо.

[@AnanthakumarBalakrishnan]

Please give better resolution video😢

[@georgeroper9210]

Nice to see a shop that doesn't wear face masks......Good video

[@bernardtarver]

Huh?