Got a K40 problem. I have installed the Cohesion 3d Mini. I have got the flat ribbon cable installed and the power cable installed. I only have one drive cable that I am guessing connects to the 4 pins above the Y drive controller. When I powered on my laser I only got 1 red LED light on and that is all. Also I can not seem to get the drivers installed on my PC. I am running Windows 8.1 64 bit. I have downloaded and the smoothie v1.0 drivers since I seen those work better with 8.1.

“Richard Gallatin”



Ray Kholodovsky (Cohesion3D) May 28, 2017 21:16

Got a MicroSD reader? Pop the card in and see if your computer recognizes it. You should see a firmware and config file on it.


Richard Gallatin May 28, 2017 21:24

Yes I can read the config.txt and there is a firmware.bin file


Ray Kholodovsky (Cohesion3D) May 28, 2017 21:28

Ok, so now put the card back in to the board. Try plugging in over USB.

Here is what I expect:

Red light indicates k40 is providing 24v. Good.

Green light right under it labelled “3v3” should be on with either power option,, this indicates 3.3v logic voltage.

L1 - L4 should first count up in binary (first boot firmware flashing).

Then L1 and L4 should be on, L2 and L3 flashing.


Richard Gallatin May 28, 2017 21:38

OK that is what I seen in the setup page. What else could I try if this does not work. Only reason I am asking is we are getting hit by a good thunderstorm and I dont want to mess with it during a storm. Thanks for responding.


Ray Kholodovsky (Cohesion3D) May 28, 2017 21:43

Can you describe what happens exactly when you power it over USB with the card in?


Ray Kholodovsky (Cohesion3D) May 28, 2017 21:45

Oh. Now I understand what you mean.

Ok so game plan is as follows:

The try USB.

Perhaps try powering each way without the card in.

At the very least, I need to see that green LED 3v3 on. If it’s not, then we’ll have to deal with that before proceeding.


Richard Gallatin May 29, 2017 12:00

Ray I have powered it on with just the USB plugged in and get just the red led light. I have powered it with just the SD card in and get just the red led light. I have tried with both the card and the USB plugged in and get just the red led light.


Richard Gallatin May 29, 2017 12:02

images/8d75b466a673f349067cc0e76442cf47.jpeg


Ray Kholodovsky (Cohesion3D) May 29, 2017 13:13

Your Y driver is inserted upside down.


Richard Gallatin May 29, 2017 14:17

Yes I seen that and replaced it with the extra driver that I ordered. Does the cable plug in the y drive or the x drive.


Ray Kholodovsky (Cohesion3D) May 29, 2017 14:18

Y


Richard Gallatin May 29, 2017 14:21

OK I replaced driver and tried only get the red led. I reinstalled my board that came with it and it works so i know it is not the unit. Could it be a wiring issue or is it a firmware or board problem.

I even tried the cable for the drive both ways in the y drive just to be sure I was not backwards.


Ray Kholodovsky (Cohesion3D) May 29, 2017 14:25

Unplug all the cables and driver modules and try once more with just USB.


Richard Gallatin May 29, 2017 14:39

I tried with everything unplugged but the cable from the psu only get the red led.

images/637218e448fd6f118c7817fa21f9b576.jpeg


Ray Kholodovsky (Cohesion3D) May 29, 2017 15:26

It seems like the board was damaged due to the incorrect Y driver orientation.


Richard Gallatin May 29, 2017 15:29

OK that makes since. I can order a new board NP. Is my mini board fried or would you want it back to see if it is the board or something else.


Ray Kholodovsky (Cohesion3D) May 29, 2017 15:35

The Mini board is fried.

Sounds like your SD Card might still be good, not sure if the A4988 drivers are.

You can get just the Mini and a few drivers to be on the safe side.


Richard Gallatin May 29, 2017 15:40

I do have one other question. What is this and where is it located. I never seen or messed with this in the directions.

Notice the potentiometer at the top of the module, and that it has a flat side which should be facing up/ out. You may need to rotate this about 45 degrees clockwise. Ideally you would use a ceramic screwdriver. Minimize your risk of shocking the module by touching something metal like a radiator with both hands or otherwise grounding yourself.


Ray Kholodovsky (Cohesion3D) May 29, 2017 15:50

lh4.googleusercontent.com


Richard Gallatin May 29, 2017 15:53

OK Now i see it. Thanks for all your help in my stupid error. Hope a new board is the answer.


Kelly Burns May 29, 2017 22:48

Looking at the mounting, it looks like the board is a bit close to metal carrier. Is it possible something is shorting out? If there aren’t already (as it looks) I would get some spacers in there.


Richard Gallatin May 30, 2017 00:05

There is 1/4 to 3/8 inch spacers between board and metal case.


Kelly Burns May 30, 2017 00:48

That’s good. Definitely doesn’t look like that much.


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