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Wiring a M2 NANO

I read in a previous post that not all connectors are in the correct tabbed orientation, you may have to replace or push the existing connector in the opposite way.

I have a question on the two four pin connectors.  On my M2 Nano the (2) four-pin connectors are labeled X and Y, no other detail.

1) Can you make a suggestion which connector I should use X to ? Y to ?

2)If accidentally switched or plugged in the wrong orientation, will this damage the board?

Thank you

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These pictures are from the instructions on the site.

When I installed my gerbil I had to lift the white collar off the board and turn it round so the locking tab was on the other side.

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If you look closely at the two photos:

Step 4. M2Nano Board the wires are W-Y-B-R
Step 7. Gerbil Board the wires are       R-B-W-Y.  White and Yellow positions are swapped.  Are we suppose to swap them on the connector?  My K40 will not home, there is a buzzing motor sound.

Hi,

Your board looks similar to mine, which means it could be suffering the same noise on endstop problem.

Try putting the carriage in the center of the work space, remove the endstop plug, and telling it to home. Be prepared to cut power if it starts to move as it wont detect the endstops and so will crash the head into the side of the machine (not a pleasant noise).

If that works you'll have to put some 100nF caps between the endstop lines and earth, or you increasing debounce time, $26=500 and see what happens.

 

Quote from beadman213 on December 25, 2017, 9:54 pm

If you look closely at the two photos:

Step 4. M2Nano Board the wires are W-Y-B-R
Step 7. Gerbil Board the wires are       R-B-W-Y.  White and Yellow positions are swapped.  Are we suppose to swap them on the connector?  My K40 will not home, there is a buzzing motor sound.

You can turn the connector 180 degrees if the motor runs in the opposite direction. If the motor only buzzes then it might be various issues:

1. Indeed w and y are swapped but that would be very strange. More likely it will run but in opposite direction.

2. Step stick has too low current, so carefully increase the current via the miniature potmeter on the stepstick. Be care ful too much current can cause the laser power psu to give up. (Output diodes can only handle 1 amp each)

3. The step stick is broken (static electricity). Both or only one, you can test this with swapping the stepsticks. I think it’s unlikely in your case.

I would try option 2 first and see if it improves (open it just a quarter extra). If it does not help then swap the stepsticks. Let me know how you go.

To the Guest who wrote:

Your board looks similar to mine, which means it could be suffering the same noise on endstop problem.

I removed the 5-pin connector controlling the endstops.  The system will not home at power up and some motor makes a whining sound without moving. Thank you for the instructions.

To the Guest who wrote:

2. Step stick has too low current, so carefully increase the current via the miniature potmeter on the stepstick. Be care ful too much current can cause the laser power psu to give up. (Output diodes can only handle 1 amp each)

Don't have experience with step stick or potentiometer.  Assuming that the are the small boards with the heat sink on top, which direction would you suggest turning the pot and how much should I turn it. Thank you in advance

Quote from Guest on December 27, 2017, 9:06 pm

To the Guest who wrote:

Your board looks similar to mine, which means it could be suffering the same noise on endstop problem.

I removed the 5-pin connector controlling the endstops.  The system will not home at power up and some motor makes a whining sound without moving. Thank you for the instructions.

I don't think it is supposed to home at start up, mine doesn't but it does home before a cut if I tell it to.

I have a Nano M2 board too, the one with two mechanical end stop and no ribbon cable, managed to get it to do some very basic cutting earlier, the only bit I haven't done yet is the center pin of the power knob.

Yes, it won't home at startup, tell it to home by connecting a terminal emulator to it and sending a $H. It might also be worth sending a $$ and putting the results here.

You can google setting up or adjusting Pololu A4988 stepper drivers, or their Chinese equivalent.

Best guess at a starting position would be to start with the flat on the pot to be towards the bottom outside edge of the board and then turn anticlockwise about 10 degrees.

Make sure the heat-sink isn't shorting any pins.

 

And a photo

 

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