I don’t know if our Canadian friend is providing some well placed sarcasm or not, but I LOL’ed. Thanks for the humor. And ya I really did laugh…
Ah. Is @TinWhisperer actually “TimHortons” Whisperer?
I work in medicine and use exclusively metric. Most stuff we buy comes with metric fasteners now. Having to maintain metric and SAE stuff is expensive. But clearly it makes sense.
I am starting to shift toward metric, at least with the bolts and threaded inserts for plastic models.
I am following @Richarddbeck83 conclusion: Metric is more common around the world and thus manufactured in greater quantities. Therefore metric parts/hardware are more likely to be sold at cheaper prices.
Sorry Richard. I know you didn’t say it like that but that is how my brain interpreted it.![]()
Bigdaddy2166 hates the metric system. Yes, it may be a better alternative but my 70 year old brain is programmed to imperial.
I agree except the better alternative part. The metric system is just wrong all around.
Man, Phillip, you are opening a can of hate mail.
Imperial vs the world….
We don’t see any metric clocks yet do we….
Anyhow the reason we use the number 12 and 60 makes a lot of sense it’s built right into our hands.
And for building houses the scale of Imperial works so much better than any other system in my opinion.
Myself I am forced to use both systems.
One issue I have is you end up using extra digits for similar measurements.
I work with Cat equipment most of the time. That have started trying to slip a few metric parts in on a occasion. That doesn’t make sense why would a company try to use two systems..
@Bigdaddy2166 I have been known to stir a few pots from time to time. I always wash my hands.
. Besides it raises people’s blood pressure. It’s good exercise for their hearts.
Close enough on the quote. Needless to say, I agree.
I also switched over to metric tooling for my cnc mill.
@TinWhisperer beat me to it.
So Dan @zargnut You can see how quickly we can get off topic. If you ever get annoyed by it, just remind us by asking another question or make another point about your situation and we usually snap back into line.
Edit: Wait a minute, it appears you were colluding with the railroaders!!!
I withdraw my concern.
I’m with you. My default in Fusion is mm and pretty much all my design work is metric. Even my wood work in my shop I try to so all of my measurements in mm as the math is SOOOOOOOOO much easier!
My large CNC router here is still natively inches, but I primarily design in mm and let the post processor figure it out.
If some people had it their way, we would still be working in cubits.
Another comment to add is try to use clean geometry.
You can see the SVG you used is very dirty and faceted.
And by the time you’re generating your G code it’s putting out 4541 lines.
If you add smoothing you can reduce this by a huge margin now it’s only producing 180 lines of code
if you were to use very clean geometry to start with it would only produce 148 lines of code.
Here’s a screenshot example of how extruding is done
And I’ll reiterate the point of extruding your geometry into a body and then pick a surface face makes it far easier.
and here’s an example of looking at the side facets and how irregular the geometry was it’s way more evident when you extrude it.
See how many facets there are. This screenshot also includes where you can apply smoothing
and this is an example of a body extruded from a clean sketch. Very few facets only where you need them.
You’re trying to get clean geometry but your plasma torch is trying to jerk around and follow every one of those facets you’re gonna have a tough time achieving clean smooth cuts.
That is an excellent illustration!!!
Well I still design in inches but use metric fasteners and cutting tools.
I dislike the metric system but can’t deny the $ saving
I agree.. stainless at my regular supplier has gotten really nuts.. If you happen to be around northeast US - Penn Stainless Products has very reasonable pricing. Depending on mill origin, and tariffs they have to pay their pricing by pound for the stuff I ordered is as low as $2.1515/lb. But I also ordered some crazy expensive SS structural beams for a project at $7.41/lb
2 PC SSE 304/304L .25" x 6" x 12’RANDOM weighs total 123 LB at a price of $2.1515 LB for a total of $264.63. This would make your 12x12x0.25 about $22 USD. I don’t have any relationship with them.. they are just a surprisingly reasonable and very nice SS supplier.
BTW. I abandoned smiley.. and am following earlier recommendations and beginning with some basic shapes without the tiny lead-in challenges.. to help dial in settings.. I will report back with settings and some pics of my latest fails. ![]()
I am going back to the beginning, Fezzik
I tried a simple straight cut. same material. The top looks ok.. There is a fair amount of dross. But the biggest issue is that it is not cutting through the end.. I noticed the same on the smiley. The material is 6.0” and I started at the leading edge with a cut length of 6.2”.. likewise on the smiley I used the overlap feature and overlapped by 0.25”
Any ideas on :
- How to get it to finish the cut?
- Does the Dross tell you anything about my settings with regard to speed, pressure?
I did confirm that the plasma is maintaining 72 PSI while cutting, and I have it set to 45A.
I am going to take a stab and answer my own question… looking at the side profile it is angled backwards by like 45 degrees, so I gather that my speed is just too high at 38 IPM..
Take a picture of what your nozzle looks like and post it here.

















