Search found 40 matches

by jluther
Sun May 05, 2013 3:29 pm
Forum: Other - (etchers, drag knifes, lasers)
Topic: Vinyl Cutting Blade
Replies: 37
Views: 20981

Re: Vinyl Cutting Blade

yea, my idea doesn't work for anything but G01. Also, it would offset to the tip, which isn't necessarily pointing in the correct direction. So the lead in would still exist. The problem with lead ins is if the lead in is on the inside or the outside of the geometry, there will be a little slit in t...
by jluther
Wed May 01, 2013 12:11 am
Forum: Other - (etchers, drag knifes, lasers)
Topic: Vinyl Cutting Blade
Replies: 37
Views: 20981

Re: Vinyl Cutting Blade

oooohhhh... That offset... :/ I could see doing it in a postprocessing script maybe. EDIT: The concept here is that the code is known, and therefore the offsets are known. The code can be modified before execution to include the offsets when the drag knife is re engaged. The Nx, and Nx-1 would need ...
by jluther
Sun Apr 28, 2013 11:42 pm
Forum: Other - (etchers, drag knifes, lasers)
Topic: Vinyl Cutting Blade
Replies: 37
Views: 20981

Re: Vinyl Cutting Blade

G54 Z0.XXXX should do it right? LinuxCNC has made me soft in those offset codes... roughly... if you're on a fanuc type controller. Most controllers will have the ability to just offset it. Or you can enter a tool offset into T1, T2... etc. depending on how many tools and how good you are at putting...
by jluther
Sun Apr 28, 2013 11:28 pm
Forum: Mini Spindles - Purchased
Topic: Chinese spindle (the 2nd best thing I've done for my Shapeok
Replies: 27
Views: 32572

Re: Chinese spindle (the 2nd best thing I've done for my Sha

The key with minimizing weight in my point of view is to allow faster movements and acceleration. This is a particular concern when using a 3D printer because there are a lot of stop and reverse points. However, if you ran steel at those feedrates in a shapeoko the belts would flex and skip due to t...
by jluther
Sun Apr 28, 2013 5:30 pm
Forum: 3D Printing
Topic: It prints!
Replies: 9
Views: 4221

Re: It prints!

Hey nice post! I was just curious about the piece of angle stock you're using to connect to the dremel tool mount. Right now I'm running mine using a hacked off shelving bracket (that happens to fit the NEMA 17 motor beautifully) However, I can't hold two motors my way and I have 2 extruders. A coup...
by jluther
Sun Mar 03, 2013 6:44 am
Forum: 3D Printing
Topic: QU-BD Extruder steps per setting.
Replies: 4
Views: 2211

Re: QU-BD Extruder steps per setting.

Wouldn't the quick method be to calculate using the circumference of the gear multiplied by the area of the filament, then divide by the nozzle diameter? Some of the other extruders use gearing and I seem to remember 106 being a number I crunched for a wade's extruder... Either way, worst that can h...
by jluther
Fri Jan 11, 2013 3:59 am
Forum: Other - (etchers, drag knifes, lasers)
Topic: Vinyl Cutting Blade
Replies: 37
Views: 20981

Re: Vinyl Cutting Blade

Sort of, I was able to get a spring and hack it, and get a PVC piece to fit over it. However, the rigidity is not sufficient, I'm thinking along the lines of a c-channel now, drilling a hole in a piece of plywood, then feeding the blade holder into it, then with some creative bracketing putting a bo...
by jluther
Thu Nov 29, 2012 11:59 pm
Forum: LinuxCNC
Topic: Heekscad and LinuxCNC. Explain cutter comp to me?
Replies: 2
Views: 2226

Re: Heekscad and LinuxCNC. Explain cutter comp to me?

It's useful if you're interested in the few thousandths of tool wear being easily compensated for. In a production case after a few thousand parts things start to shift and wear and if it's an endmill, then you plug in a smaller tool diameter to bring the part back into specification. Your fixturing...
by jluther
Wed Nov 21, 2012 7:53 pm
Forum: Discussion
Topic: Polycarbonate - warning - newbie question!
Replies: 5
Views: 1583

Re: Polycarbonate - warning - newbie question!

just run any plastic endmill and you'll be fine for the PC, typically plastics are high rpm because of the tooth load but the dremel will do fine, maybe even with standard bits. I'm more concerned about getting food grade PC and milling it. I'd think you could make a negative out of anything then us...
by jluther
Sun Nov 18, 2012 3:17 pm
Forum: Discussion
Topic: Polycarbonate - warning - newbie question!
Replies: 5
Views: 1583

Re: Polycarbonate - warning - newbie question!

Well I haven't milled polycarbonate. I am curious as to why polycarbonate is the choice, most food contact materials are specific stainless steel alloys. However, if the FDA thinks it's ok, it's food grade, and you can keep it from fracturing, then I guess it'll be fine. The spindle is a dremel tool...