MK extruder (bought here) wiring to ramps

Mostly Printed CNC - MPCNC Advice
1

Hi everyone,

I bought the complete kit from the e-shop here, build everything pretty easily and made (what i consider :slight_smile: ) a pretty cool piece of geeky technology.

BUT i can’t get my extruder (also bought from here) to work. The stepper won’t turn or just go back and forth from one step to another.

The problem is most likely a wiring problem:

  • the stepper is not fried as it works with the other axis
  • the stepper as 4 wires : black and green (that beep together with a continuity test, therefore they must be the same coil) + red and blue.
  • the jumpers are under every driver.
  • the extruder is enabled in the Marlin Firmware as the extruder heats up and stabilizes (extremely) well
I hooked up black and green on 1A & 2A on the ramps, same with red and blue going to 1B & 2B.

I expected the motor to at least turn in the wrong direction, have to switch one pair and be good to go. That was in theory.

There is something strange: the stepper of the extruder has a 6 pin connector on it with only 4 wires (see attached picture). Can anyone who bought the extruder from Vicious be king enough to send me a picture of his stepper (with a way to tell me “front” and “back”) and tell me wich wire goes where ? that would at least help to try and understand the problem.

hope someone can help me.

greetings from France

Pierre

ps: more pictures to come once everything will be running. I ended up building a decent rack for all the electronics

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2

There is a safe extrude feature, you can not move the extruder until it is at least 170C, most all printers have this enabled.

 

Is this the problem?

3

Hi Ryan,

Nope, I forget to mention that I also paid attention to that …

4

Ryan,

Since you see to use this extruder would you mind checking your wiring and compare it to mine ?

Pierre

5

The extruder comes with a plug on it that works, if you extend it just splice wires in between it.

 

The pairs on the ramps board are 1a&b, 2a&b. Looks like you might have that wrong, Not 1,2a 12b

6

If you can’t figure it out telling me wire colors doesn’t help they change all the time. Put the original plug back on and verify it works, then extend 1 wire at a time.

7

Yep sorry, 1A&B and 2A&B. If you re sure that the plug wiring isn’t faulty then it can (has to ) be my wiring. A pair shoula have the same number and not the same lettre right ? I ll give it a try

Thanks for the fast replies !

8

The original connector is on the stepper and the wires were indeed extended. I sent the picture in order to be able to compare the position of the wires show were I had them hooked up

9

The other end, the end that fits into the ramps board, the end you cut off. That end is wired in the proper order, not the stepper side.

10

ok, i already tried this but i guess i can try again :-). I just started the rack i’ll tell you in a minute.

pierre

 

11

and the winner is … Ryan. :slight_smile:

thanks alot for just telling me something as obvious as “just take the cable i sold you and put the colors in the right order”.

I can’t even rely on arguing about the 1A&1B thing … gosh i hate being stupid !

thanks again. and i’m really sorry for bothering you.

Pierre

12

Just glad it works. Things like this would take 10 seconds in person, 2 hours over text. I wish I could make house calls.