How Accurate is my SYIL X7?
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- Опубликовано: 22 авг 2024
- In this video, I mill a simple Circle Diamond Square model and then measure the part for accuracy. Disclaimer, I don’t have a metric micrometer, so I’m using an outside micrometer with an accuracy of .0001” and converting to metric. I plan on taking the part to the metrology lab on campus to measure again.
Additionally, how I tool-path and mill the part has a huge impact on the ultimate accuracy. For example, the bore seems the most inaccurate, but in my opinion that is more likely due to the tool-path versus the capabilities of the Syil. It did wonderfully everywhere else. 
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This video should be titled, How Accurate is my CAM? I have learned so much about my machine and Fusion 360 since making this. The SYIL is very capable and accurate. Definitly more consistent than me. 😁
Nice video 👏🏻, waiting for more videos about the SYIL X7
Thank you! More videos are definitely coming. I still have much to learn.
Looking really good!
I just did that same test on my small wood cutting CNC (bought at a thrift store for €25, replaced the old controller with an Arduino running GRBL). Apparently, it has different pitched lead screws on the X and Y. 😅
That's cool. We also run a wood-cutting CNC router in the woodshop. I'll admit that's where I got the idea for this video.
We're in the middle of using a micro-controller to make a manual pulse generator (MGP) for the router. It's an interesting project. I definitely need glasses and a magnifying glass to see well enough to solder those tiny pins.
Always good to test your self.
Interesting test. Thanks for sharing!
Thanks
Why was the bore accuracy so bad? What can Syil do to make it perfect? 😮
The accuracy (or lack of) was my fault. The numbers I got were due to my speeds and feeds and the deflection in the small endmill I was using. All of my measurements were one and done, meaning I ran the part once, and then measured. I learned that I need to be more thoughtful when programming small bores.
Recently, I had to hit a number on an internal bore to allow a sliding fit. I didn't his the number on my first try, but after a couple of spring passes I hit my tolerance.
On the bright side, at least it's not milling too much material. I think it's reasonable to account for deflection by running a spring pass or adjusting wear using cutter compensation.
Calipers dont have a perfect knive edge.
So you are basicly measuring with 4 points wich wil give you an smaller reading.
@@jankaas2760 That's a great point! Thank you
-0.20mm for a 10mm bore seems ridiculous for such machine, is there any update on why this happens?
I'm much more familiar with the Syil now. My biggest mistake during this test piece was pushing the tool path too aggressively. The helical bore wasn't a bad strategy but I think my final contour path was too aggressive and my endmill deflected. For better accuracy, I like to leave less on the walls for the finish pass and even follow up with a final spring pass. I programmed repeat passes on the square and diamond and the measurements were better.
@@PowerForgeWorkshop I use gwizard calculator, it calculates the deflection
@@dancollins1012 Cool, I'll check it out.
@@PowerForgeWorkshop A lot of people, especially when first getting into CNC programming, don't realize there is a conversion that needs to be done for circular interpolation especially when dealing with bores. Some CAM software and machines can do the compensations for it, but a lot don't, so the feed rates people normally post out are much higher than they should be. There is a multiplier you need to apply to the feed rates: (Diameter you're cutting - tool diameter ) / (Tool diameter)
Example: Cutting .375 inch bore with a 4 flute 1/4" tool (RPM at 3000, chip load per tooth of .001)
Linear feed rate: 3000(RPM)*.001(chip load)*4(# of flutes) = 12 inches per minute
Circular feed adjustment: (.375-.250)/(.375) = 1/3
Adjusted feed rate = 12*(1/3) = 4 inches per minute
@@adriand.896 Awesome! Thanks, I'll put that in my tool box for future use. I already have your comment copied to a word doc.