Wow. That was silly of me. So my last question is about “Sharp Stuff”. My first project is cutting 3/4" plywood for the work table (4’x8’), which I know is not recommended, but the accuracy would be great if it was within 1/8". I will then remount the parts on a smaller base (30"x 56"), which will sit on the larger work table. So the question is, what bits should I buy? I was looking at the Kyocera bit specifications and realized I did not know the cutting length (l) of the bit in the store. I was looking at the 1/16" bit, and the uncoated part in the catalog is 1710-0625.750. Being a neophyte, I don’t know what the appropriate diameter (D) of a bit should be to cut plywood, or what coating is better. Is 1/16" too small? What bits in the store have a cutting length of 3/4"? Are they appropriate for cutting plywood? Thank you again.
While my order did arrive very quickly, the quality of the cuts is fairly poor. A majority are incomplete as shown in the pic with a tab leftover where it appears the cut wasn’t completed and the tube was bent back and forth to break it free. I can try to clean this up, but it’s pretty disappointing to order this product specifically for cuts and pay a premium to have it cut and then the cuts are this poor.
Maybe my experience is an outlier, but if you’re going to pay $160 for specific cuts and shipping and then have to clean up every cut, it seems like an issue.
I suppose. Ordering was easy and cuts were accurate length, just poorly done. They responded quickly to my concerns and stated they would address the issue. I just wish they would have cut it correctly to begin with and offered a partial refund without having to ask.
So I’m beginning the assembly and I’m confused by the variances in cut calculators.
“Sample Cut list
3 Rails X = Usable Width +264mm (10.4in)
3 Rails Y = Usable Depth +264mm (10.4in)”
These calculations agree with the with a link specifically to this page:
jscalcio/calc
These indicate all 3 X-axis and all 3 Y-axis tubes are equal length.
However, the calculator on the docs page:
docs.v1engineeringcom/mpcnc/calculator/
This indicates the 2 axis are a bit longer than the gantry for both X and Y.
The links you provide don’t work for me, but I’m about 99.9999% sure that the first two references were for the Burly version. The last link is for the newest Primo version. And yes the 2 axis tubes are a bit longer on the primo version.
Sorry about the links. It wouldn’t let me
Post with links so I took the . Out before “com”.
That would make sense. There just isn’t any reference to the burly version on either of those pages that I remember. I found some 1” non stainless tube at a local big box and I’ll just use that I suppose. Lesson learned.
There seems to be a short period of time after joining the forum before you can post links. I’d guess it is to prevent spam. Be careful about the 1" “tubing” from the big box store. Most big box stores don’t carry 1" tubing. They carry 1" pipe. Pipe won’t work for the MPCNC since it is measured from the inside and is substantially larger than 1" on the outside. Typically if you want to purchase from a big box store, you need to purchase 3/4" electrical conduit and use the 23.5mm version of the parts. If the big box store is selling tubing, take something to accurately measure the tubing and verify that it is 25.4mm on the outside.
As for the lack of the calculator being marked “Burly,” at the time the first calculator was created, there was no other calculators so no need to mark it as Burly. Plus I’m guessing that the old calculator was created by someone other than Ryan given where it is hosted.
My local HD and Mendards actually has 1" steel DOM tubing, but only in 36" lengths, which is fine. It measures 1 1/128" on my calipers just like the stainless from Speedy metals. I hadn’t found it earlier because it’s in hardware and not anywhere near other conduits, tube or pipe. Stainless is definitely nicer, but I’m not sure it will matter when the dust starts flying.
I shrunk my Y just a hair and used the stainless and then used 3 of the DOM 36" to make the X rails and gantry. I only needed 30" for the X rails.
The machine supports 18x12 material and I got all the way up to the tool mounts yesterday and realized I hadn’t printed them because I wasn’t sure what I was going to use as a spindle yet. They’re printing now.
Thanks for the advice. Looking forward to firing it up soon.
