Search found 43 matches

by minorthreat
Wed Feb 06, 2013 8:17 pm
Forum: Design Ideas
Topic: Dual Drive Setup (with driveshaft)
Replies: 40
Views: 16654

Re: Dual Drive Setup (with driveshaft)

Mcmaster is my general goto for mech parts.

http://www.mcmaster.com/

Rod will save you money vs shaft, and it's generally pretty straight (at least straighter than HDepot rod)
by minorthreat
Fri Jan 04, 2013 10:30 pm
Forum: Design Ideas
Topic: 4 Axis mod ?
Replies: 21
Views: 8401

Re: 4 Axis mod ?

IC I saw this in another board. It's the pic of a 4 axis that's about $5K. Looks like a good way of possibly adding a 4th to the 'Oko? Not sure what the spinning portions are, but the standard aluminum extrusions setup looks straightforward. ] Looks like a clamp-on rotary axis. What you're seeing t...
by minorthreat
Thu Jan 03, 2013 5:16 pm
Forum: Design Ideas
Topic: Dual Drive Setup (with driveshaft)
Replies: 40
Views: 16654

Re: Dual Drive Setup (with driveshaft)

Here is my drive shaft. I have the larger spark fun steppers (nema23) so i went with a 1/4" shaft. The drive shaft is riding on these bearing: http://www.mcmaster.com/nav/enter.asp?partnum=57155K337 This coupling joins the drive shaft to the stepper shaft: http://www.mcmaster.com/nav/enter.asp?partn...
by minorthreat
Sun Dec 30, 2012 4:26 am
Forum: Design Ideas
Topic: Treatise on Y axis Racking error (Stop Calling it Backlash)
Replies: 4
Views: 2212

Re: Treatise on Y axis Racking error (Stop Calling it Backla

Wow, I haven't thought of the extra stiffness across the gantry thru the idler (or any other) hole. That's a brillant (cheap) idea! you could even preload a tube or something with the thread rod to lock the 2 plates together.

I'll run to ace tomorrow and test it out.
by minorthreat
Sat Dec 29, 2012 7:16 pm
Forum: Design Ideas
Topic: Treatise on Y axis Racking error (Stop Calling it Backlash)
Replies: 4
Views: 2212

Treatise on Y axis Racking error (Stop Calling it Backlash)

On a stock shapeoko all of us are seeing ~2-3mm of Y axis racking error (@5lbs on the opposite side of the belt drive). This has been mislabeled "backlash", or "lag" a few times. Backlash is strictly a motion dead-space due to teeth tolerance in transmission elements and lag is more of a side effect...
by minorthreat
Sun Dec 23, 2012 4:24 pm
Forum: tinyG
Topic: Copy of the Latest Firmware (sans github)
Replies: 1
Views: 912

Re: Copy of the Latest Firmware (sans github)

Well, it's back up now.
by minorthreat
Sun Dec 23, 2012 12:39 am
Forum: tinyG
Topic: Copy of the Latest Firmware (sans github)
Replies: 1
Views: 912

Copy of the Latest Firmware (sans github)

Github is down. Is it possible to stick a copy of the latest firmware on the shapeoko wiki?
by minorthreat
Tue Dec 04, 2012 7:09 pm
Forum: Member Projects
Topic: Backlit cedar box, LED help please.
Replies: 23
Views: 6153

Re: Backlit cedar box, LED help please.

EL wire is pretty annoying to work with and you'd have the added complexity of having to hide a High voltage driver somewhere (Like sparkfuns EL sequencer). Given the proximity to xmas LEDs seem like the way to go.
by minorthreat
Fri Nov 09, 2012 2:56 pm
Forum: Design Ideas
Topic: Dual X MakerSlide with room in between?
Replies: 11
Views: 5443

Re: Dual X MakerSlide with room in between?

Awesome idea. I was cutting the other day and noticed that the Vwheels have very little resistance to moment. I'm going to use this idea but on the V1 plates, ie 2x makerslides side by side, with the carriage overhung on one of them.

Also, nice tinyg.
by minorthreat
Mon Oct 29, 2012 2:26 pm
Forum: Design Ideas
Topic: It's time for a metal v-wheel
Replies: 36
Views: 10483

Re: It's time for a metal v-wheel

Be careful preloading your new aluminum V-wheels, and make sure you lubricate, lubricate, lubricate. Aluminum on aluminum has a nasty tendency to gall up (cold weld). Brass or bronze would be a better material choice, and I believe the original design intent was to have the (less painful) V wheels w...