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yes & no --actually I not sure for those particular images. I did testing with my soldered board & a breadboard & saw no change.


my understanding is the internal reference is 2.5v (2.49...) and...

TL431 ...my bad. I was using it in the most basic configuration, cathode & ref shorted together and to 5v via a ~1000ohm* resistor and then a decoupling cap to ground (*i played with the size of...

https://lh3.googleusercontent.com/7AprMjVLksLaADz3P3BG7Lzg73AWUiJSF8w1Kj9MmVPhzK4eBUWEvSoiITi7M6wu8m60WLNjp7PgLh3WTqQIOOMcE3hcC7z4s5NBFCQ_2O4dRG90r7iJWM8HnlLijD508eAbAD8irA=w2400

well my soldering...

i suspect it has more to do with amazon's search algorithms.....the real question is did you buy the soldered or un-soldered version?

I gotta say, it calms be a bit that even someone who know what...

hey sorry for the delay, winter hit fast and hard here this weekend, and I was not ready. Also I bit into that soldering iron station project and ended up on some tangents, useful, but tangential...

thats good to know, and I getting into that ballpark at 10k : 20K or is that more when you get up into mega ohms?

my question was a bit unclear, I was asking if its ok to take the 3 op amps from...

I will have to put the whole thing, at least the electronics, back together to test it. I was planning on doing that anyways, although I don't have full control of the machine, but I can get it to...

-home switch thing was kind of a "duh" moment for me, I just hadn't though it all the way through.

-you cleared up usb nicley and I think I will include those ESD diodes you suggested

-ill just...

worked out a bit of the logic...all of this is predicated on grbl doing all the motion planning and spits out a step & direction signal. And I am just going to refer to 1 output signal(from samd) for...

just wishful thinking on my part I guess.


that's interesting and useful. as well as the precise homing method, I assume that only works with non-contact systems that have room for you to go...

Your outline of your chip selection process was very helpful..I mean I am still terrible at it, but at least that process minimizes my frustration. I have started building the circuit, got most of...

encoders & ballscrews: encoders 500 lines x 2 encoders = 2000 events per motor shaft rotation
belt drives 3:1 = 6000 events per ball screw rotation...

thanks for the clarification on bootloaders. As a novice, I will probably load a standard bootloader, whereas is sounds like you do some custom stuff there, right?

so I will stick to a mega as...

I'd be lost without people like you!

I think we are on the same page in terms of the big picture theory of how this all should work. I do pretty well in conceptualizing electronics systems, I...

where do you all recommend ordering components from? digikey? mouser?

The white chips are TLP621's-optical isolators. Endschalter means limit switch / endstop, haubenschalter is cover switch. So...

well that's news to me, I had no idea you could get custom printed boards for just a few bucks, hell I pay $1.75 for a little proto board. And with a custom board I can rid of the jumpers winding...

that is what I have done in the past, but I have long wanted to reduce the arduino to cpu...so I am open to it. I am not comfortable with any of it really, but one must do things uncomfortably for a...

uploaded, but forgot to add to the album, my bad, try again.

sorry I didn't get the connection between the samd21 and the zero, your previous post makes much more sense to me now. And I really had no idea there were ways other than PWM to create a variable...

I agree with most of your assessments, few addions:
-I can clarify the card cage is setup like this: 3 driver boards, 3 output ports (these are cards, but basically just cables bringing the driver...

thanks so much for your response, I appreciate the detail. I spent an embarrassing amount of time reading about the various chipsets and how developed the controller software is (and if its...

I agree. But I am getting a bit confused on what does what here. So lets assume I have a CAM model, first I need to generate toolpaths in gcode using something like fusion360. At this point that...

Hi all,

I am new here and to CNC work in general. I recently bought a Cercon Brain Mill, originally used for milling crowns (for teeth). This was a rather impulsive buy, it showed up at a local...

**CLICK** now I get it, thanks so much for your help Alan, you've re-instilled my confidence in putting this CNC mill together, much appreciated!

Ok that helps get me started, now I think i should clarify and ask a few more questions. Sorry if this are really basic, its just not clicking for me. I actually loaded EMC2 last night after I...

lets start with some background:

I am building a cnc vertical mill from scratch, I have worked out most of the mechanical components but just cant figure out the control side.

My first cnc...