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I''m at the point in my build where it's time to attach the long leads from the extruder motor to its plug and ultimately plug into the Rambo. The stepper motors in my kit are the Kysan brand and wiring colors go red, green, yellow, blue. Should I plug the extruder motor leads into the plastic connector using the same order which in this case would be: red, green, black, white. The V2 manual says: green, red, black, white. Manual says there is a firmware adjustment down the line for Kysan motors...

Thank you!
Cris

I had to wire them into the connector exactly like the order on the other connectors. The manual is wrong. I just did this a week ago. If the extruder shakes back and forth, you wired it incorrectly. The order I used was red, green, white, black, which would make the picture on the build guide (Figure 16-25 on page 189) wrong.

AndyB,
Okay, that makes sense, I'll go that route.

Thank you,
Cris

AndyB wrote:I had to wire them into the connector exactly like the order on the other connectors. The manual is wrong. I just did this a week ago. If the extruder shakes back and forth, you wired it incorrectly. The order I used was red, green, white, black, which would make the picture on the build guide (Figure 16-25 on page 189) wrong.

Can others confirm that this is true? I wired mine like the manual shows but haven't gotten to the point of testing the extruder yet... I'm dealing with power supply issues at the moment which should be resolved tomorrow. I would rather correct any potential issues before testing begins.

I wired mine according to the picture in the Rambo documentation and then flipped direction bits in configuration.h until everybody went the correct way.

I just got off the phone with John and he's not aware of any wiring changes on the Kysan motors - BUT that's no guarantee that there has been some wiring inconsistencies within the motor itself.

For most motors, the wiring order shown in Fig. 16-25 isn't wrong. That being said, the motor can be reversed one of two ways - you can invert the wires like AndyB has done, or you can invert the axis in the firmware. Since you won't know if you've got a weird Kysan before you've wired that connector, the easiest path is to invert the axis in the firmware.

When I get the time, I'll update the assembly manual to point out these potential issues so they won't be such a roadblock to folks.

tnx!

g.

geneb wrote:I just got off the phone with John and he's not aware of any wiring changes on the Kysan motors - BUT that's no guarantee that there has been some wiring inconsistencies within the motor itself.

For most motors, the wiring order shown in Fig. 16-25 isn't wrong. That being said, the motor can be reversed one of two ways - you can invert the wires like AndyB has done, or you can invert the axis in the firmware. Since you won't know if you've got a weird Kysan before you've wired that connector, the easiest path is to invert the axis in the firmware.

When I get the time, I'll update the assembly manual to point out these potential issues so they won't be such a roadblock to folks.

tnx!

g.

Thank you. I'm not sure how to change it in the firmware but hopefully I won't have to.

It's an easy tweak. Scroll down to line 195 or so.

Look for this line:
#define EXT0_INVERSE true

Change it to false (or to true if it's false) and that will reverse the direction of the motor.
Save, recompile and upload and you're done.

g.

my motor is a wantai and it is rocking back and forth as well...
i did try and edit the line of code but it didnt change anything...but i did notice that when i press the extrude button now with a soft assist to the manual knob the e- is the feed and the e+ is the retract.. anyone have any ideas...?

AndyB wrote:I had to wire them into the connector exactly like the order on the other connectors. The manual is wrong. I just did this a week ago. If the extruder shakes back and forth, you wired it incorrectly. The order I used was red, green, white, black, which would make the picture on the build guide (Figure 16-25 on page 189) wrong.

by chance AndyB, is your motor a wantai brand as well?

i did notice after 2 or 3 tests to see which way the motor was trying to turn the signal finally quit and there was no further response from control matter from any of the controls...i would have to restart the program to get any response again...so now i'm just gonna wait till someone can let me know whats what or until Monday when support chat is back up...at least their support is a++ so far..
but if this is a wiring issue that isn't covered in the manual then i would think they shouldn't wait for more people to get frustrated with their product.. there are quite a few discrepancies with things not being explained well or omitted entirely like example pics or illustrations for certain instructive ideas in the narrative of the manual.

thanks in advance

jim

AndyB,
i tried wiring the watai motor to your rewiring specs and low and behold...it works! without a hitch it worked like a charm..
i think everybody who has this problem in the future should check the brand of motor they were sent before they try this wiring config first because they instruction manuals version will work for they brand they described for it to be used with i'm sure but for the watai brand witch all of my motors were of the same..the extruder should be wired as AndyB has shown.

thanks again bro...its much appreciated..i just couldnt wait to play with my new toy...lol
jim

I wasn't 100% sure what brand my motors were. I bought it in February 2015, so I assumed that they were Kysan. I spoke with Gene at MRRF this year and he seemed to think that some motors might have come from the manufacturer miswired. Based on the strange behavior (chatter), I figured it wasn't something that reversing the direction in the EEPROM would fix. I also did a motor substitution -- I hooked up the extruder to the X axis, and it chattered, but the X axis motor worked on the extruder port. Based on those tests, I deduced that all of the wiring order should be the same, so I made the swaps (it's a PITA to remove those pins from the connector). Glad to hear that you have a working printer.

I'm building my max v2 now, (I'm at the onyx bed) and I'm concerned I may see this issue. Would it be possible to get 2 pictures of the wiring? One per the manual, and one that works if you get the chattering extruder?

Thanks!
Rob

One of the coming revisions in the manual is a change to how you wire the extruder. You'll clip off the connector as usual, but instead of discarding it, solder that sucker to the other end of the wiring that goes from the top of the machine to the bottom. Just pay attention to what stepper wires go to what extension wire colors and you'll be golden.

g.

That wasn't how it was originally? I could've sworn that how it was..

Nope. JJ hit me with that at MRRF. Totally obvious solution to the problem. No more whining about those crimp connectors! \o/

g.

CRPerryJr wrote:I'm building my max v2 now, (I'm at the onyx bed) and I'm concerned I may see this issue. Would it be possible to get 2 pictures of the wiring? One per the manual, and one that works if you get the chattering extruder?

Thanks!
Rob

hi rob...first look at the brand company on the motors to see if they are all the same (or not) and then post them up...if i can since i just had this figured out ill help you out but as far as a pic...well im in the middle of printing the fan shrouds...but after that if you arent passed that point ill snap a pic and post it i just dont wanna take the panel off right now to do that while im printing and all...

jim

I would also ohm out the coils - I have had a used stepper come in that had a burnt out coil.
These shake back and forth when you try to run them.

Also, if one of the connections is bad you will get the same shaky behavior.