I am not suggesting that anyone buy this PS, only quoting his reply. I did not buy the PS. I have several laying around, but most are smaller than suggested. I think I am buying a 500W+ modular PS, so that I can only plug in what is needed to keep things neat and tidy.

 

Mark, the price and specs sure look good on that unit, but I only wish it was modular so I could leave out all of the unneeded wires. They are more spendy, but I would like a clean controls case.

Decision, decisions........

 

Yup, they that's how it goes...first your money, then your clothes.....then your credit cards. LOL
I am waiting for the slow boat from China (really) to deliver my laser stuff. I have time to figure out the power thing.

 

Are these boards available? If so how can I order one.
Bob Davis

 

http://openbuildspartstore.com/cnc-xpro-controller-stepper-driver/

 

Ok new to this bit, what's the largest stepper motor you can use with this?

Thank you,
Jim

 

Hello, sorry for this Noob question. My stepper motors, specifically the nema 23 came with 4 wires: red, yellow, green and blue.

Im assuming the yellow is ground
Your wiring images show motors with 2 reds and 2 blacks.

Can someone please let me know the correct way to wire these motors on the xpro?

Im not sure what color should go on B1, B2, A1 A2,

And second, if im slaving the second x axis motor, do i just use the same x-axis and reverse the wires?

 

True, however, if one still can't find the wiring scheme of their steppers, just need to do a quick continuity test ... When the right pair of wires is found, the continuity test will 'beep'. The other pair of wires will be for the other coil. One pair: A1/A2, the other is: B1/B2. To reverse direction of the stepper, invert just ONE pair at the controller.

As for slaving the A driver for the second X stepper, look carefully at the CNC xPro ... It typically comes preset to slave the Y axis. So one might have to get the old soldering iron and solder pump out to change that. If the xPro is not yet ordered, the supplier might be able to configure the xPro before shipping it out.

The jumber setting is shown on the back screening of the CNC xPro. Typically, it is the Y axis with two steppers.

 

So then if I don't want to solder the board (which im not good at anyway) i would then just wire the 2 stepper motors for the x axis in the same terminal, but reversing the coils on one of the motors?

 

Ok these is what I got.
copy of the ox build the only difference is the size
X and Y axis nema 23
Z axis nema 17
Xpro board
power supply 24 volts 15 amp (Tried an ATX power supply as well)
grbl v 0.8
windows 8.1 and windows 7






This is a video of the machine moving and trying to cut a 1 inch diameter circle it makes a weird noise and I don't know what is wrong can some body help please.

 

First, why are you using two steppers on your X but only one for Y ? X is the left-right axis, moving the assembly carrying Z (up down axis). This leaves Y as the front-back movement, typically needing the two steppers as it moves "everything" in most 'OX' configurations. Then again, one can change things around as needed by their design.

You could connect two steppers to one driver, but it is not recommended (load on driver). Especially when the controller offers slaving to an other (spare) driver.

As for reversing a stepper, only reverse connection to ONE of the two coils, leaving the other unchanged. I believe GRBL has a setting to achieve the same thing ... a bit of "calculation" to set the respective value.

 

http://www.openbuilds.com/posts/8886/

In this video the motors are driven by different electronics
The Xpro can drive the motors that smooth or I will need to buy a different board and drivers?
I have tried the gshield with the same settings same result
If I need to buy different electronics I will just want to be sure of what to buy this time

 

I guess that is what i was confused about. Which Axis moved the carriage front and back, and which moved it side to side. I have 2 motors for front and back. Is that the Y axis, therefore the board is wired to slave the Y?

 

I have no idea but I noticed it looks like it's going to cut a circle bigger than 1" more like 3"

 

Yes it does and that is why I'm asking for help I got very noisy motors and not accurate moving on the axis

 

Your motor issues I can say almost 100% is due to a bad ground as for scale I believe your issue may lie in the settings "step rate" or something silly

 

Again a good read
http://www.lh-electric.net/tutorials/gnd_loop.html

 

Yes, that's it. You should be fine using the (typical) pre-configured CNC xPro then.

I know the feeling, I tend to get things backwards as well. The beams for X are actually part of the Y gantry, and the Y beams are what everything else rides on.

I blame it on being southpawed and partly dyslexic : If life gives you melons then you're probably dyslexic!

Use the thumb, index finger and forefinger of your left hand at (approximately) 90 degrees relative to each other. Your thumb points up (positive Z), index finger points away from you (positive Y) and your forefinger points to the right (the positive X). Where all three fingers 'meet' is your origin (0, 0, 0). See, that left hand has some good uses after all.

 

Excuse my frenglish : "forefinger" (which is the index finger) should read "middle finger".

Being a lefty, I could never figure out the 'right hand rule', even to this day. I always end up with one of the axis being negative ... or me looking rather foolish. It's so much easier, and discrete, with the "left hand rule'. The left hand does RULE !

Yap ... all my coffee cups, amongst other items, are for lefties as well, their handles being on the left.

 

Do you have the micro stepping set right for the 26.67 steps/mm? Should be 1/8. It sounds like that. The Z doesn't do it, because you are closer to the right settings for that one (200 steps/mm).

 

1 x 8mm Metric Lead Screw / ACME
(Length: 300mm)
24 x GT3 Timing Belt - By the Foot
3 x GT3 Aluminum Timing Pulley - 20
3 nema 23 X and Y axis
1 nema 17 Z axis

the voltmeter image is for the amps wen the Y axis move ( I'm not an expert so - 0.26 A reading means ???)
The xpro is set for 1/8
I'm learning as I progress with the build so wen I finish I will post it focusing on people like me that want to get in to machining (Like my kids they don't sop bugging me to let them play with it)
The 1 inch circle file got to be wrong because I measure the distance wen it moves and is very close to perfect but X and Y motors sound and shake a lot Z motor not so much I use a link for a calculator for the shapeoko cnc
The wires are different color because that is what I got on hand for extension but the wires are connected the same as picture 1