Search found 84 matches

by ejs
Mon Mar 18, 2013 2:07 am
Forum: Electronics
Topic: 4 X's Stepper Shield
Replies: 24
Views: 7882

Re: 4 X's Stepper Shield

Well shut my mouth and call me Shirley. I was on my way home tonight and had the lightning strike to supplement the Buildlog v3.0 board with an 0.8c compatible breakout. I was poking around and found this thread. It's a compact build, I'll give you that. Personally I prefer a long, flat build, and m...
by ejs
Mon Mar 18, 2013 1:51 am
Forum: Electronics
Topic: A4988 drivers... Dead?
Replies: 4
Views: 1732

Re: A4988 drivers... Dead?

They're likely kaput. They're a great, compact, and inexpensive way to get steppers stepping, but they are also sensitive. Vref is the only change you should be making while the boards are powered up. Don't connect, disconnect or change anything else, including jumpers, while powered up. The other p...
by ejs
Mon Mar 18, 2013 1:27 am
Forum: Electronics
Topic: Pololu Pot Tweaking?
Replies: 18
Views: 8552

Re: Pololu Pot Tweaking?

With max cooling, and what is max you can turn pot up to? All the way? Nope. Don't do it. One of the odd design choices from Pololu is that if you crank that pot all the way up, the chip will be getting 4 amps pumped in to it. Since the chip is designed to only handle 2.0 amps they will not only sm...
by ejs
Sun Mar 17, 2013 9:02 pm
Forum: GRBL
Topic: External Reset Button for GRBL Shield
Replies: 14
Views: 13474

Re: External Reset Button for GRBL Shield

Hi Mathew, I've been playing with enclosure options for a year or so. For mine, I got a panel mount momentary with a rubber boot--in hope of keeping dust at bay. I drill a hole in the enclosure and tighten it up. The leads on the CNC shield reset button are long to start with. I leave them with abou...
by ejs
Thu Mar 14, 2013 4:01 am
Forum: Electronics
Topic: Shield (rev3) – Limit Switch Wiring
Replies: 5
Views: 3697

Re: Shield (rev3) – Limit Switch Wiring

Agreed. A good retrofit for the for the rev3 board.
by ejs
Thu Mar 14, 2013 3:58 am
Forum: Design Ideas
Topic: Wooden Cable Chain
Replies: 5
Views: 4059

Re: Wooden Cable Chain

Would those side plates fall off after a while, when the motion loosens up the friction fit? I thought the same thing at first. But if you notice, it's put together a bit like a brain teaser puzzle. In the design, the cross members are actually holding in the tips of the side plates once the next l...
by ejs
Mon Mar 11, 2013 1:13 am
Forum: Design Ideas
Topic: Precision washers were causing slop: what I did to fix it
Replies: 22
Views: 12109

Re: Precision washers were causing slop: what I did to fix i

Would simply getting some extra precision washers, measuring them, discarding the under sized ones and stoning down the oversized ones work? Also, what are the tolerances for the bearings? Could it be a classic case of only the people who wind up w/ a set of parts which are all under or oversize ha...
by ejs
Sun Mar 10, 2013 8:19 pm
Forum: GRBL
Topic: Why GRBL?
Replies: 5
Views: 2074

Re: Why GRBL?

Ultimately, many three axis robots are based on early GRBL, including RAMPS and the lasersaur project. For me, I prefer subtractive tech more than additive. Working through a setup without the problem of parsing out what isn't needed and without the added extruder motor makes sense to me. GRBL on an...
by ejs
Sat Mar 09, 2013 11:32 pm
Forum: For Sale
Topic: Arduino Compatible Stepper Shields available
Replies: 93
Views: 41210

Re: Arduino Compatible Stepper Shields availabl

Hi EJS, I was trying to order some of the bare PCBs to New Zealand and noticed you were sold out. When will they next be available again? Thanks, Harrie Hi Harrie, I have a few more, now added to the store, but only a few. I've got another big order in the works. You can always get them from Caitli...
by ejs
Sat Mar 09, 2013 11:31 pm
Forum: Assembly
Topic: Dual Z motor not running correctly
Replies: 6
Views: 2317

Re: Dual Z motor not running correctly

The previous posts are correct. But the issue with them is that you would only be having issue and terrible sounds with your motors fighting each other if you had the belts installed. Which they are not in the video. It should not sound like that--I'd double check the specs for your motors and make ...