Carve King - Done Assembly with Possible Motor Issues

[bogarts]

Hello all,

My name is Bogarts, my first time here and just bought our first Millright CNC kit. We got our Carve King - arrived the 10th of January and with all the hiccups, its finally assembled.

I'm asking about one of the Y motors, the one in the + side ( connected to Y ), is not turning/rotating or not as fast as the one on the - side ( connected to A ).

Here are the readings on the multi tester:

0.651 X
0.656 Y1
0.652 Y2 (connected to A)
0.653 Z

Here's my current config:


$0 = 10 (Step pulse time, microseconds)
$1 = 25 (Step idle delay, milliseconds)
$2 = 0 (Step pulse invert, mask)
$3 = 0 (Step direction invert, mask)
$4 = 0 (Invert step enable pin, boolean)
$5 = 0 (Invert limit pins, boolean)
$6 = 0 (Invert probe pin, boolean)
$10 = 1 (Status report options, mask)
$11 = 0.010 (Junction deviation, millimeters)
$12 = 0.002 (Arc tolerance, millimeters)
$13 = 0 (Report in inches, boolean)
$20 = 1 (Soft limits enable, boolean)
$21 = 1 (Hard limits enable, boolean)
$22 = 1 (Homing cycle enable, boolean)
$23 = 0 (Homing direction invert, mask)
$24 = 25.000 (Homing locate feed rate, mm/min)
$25 = 500.000 (Homing search seek rate, mm/min)
$26 = 250 (Homing switch debounce delay, milliseconds)
$27 = 5.000 (Homing switch pull-off distance, millimeters)
$30 = 1000 (Maximum spindle speed, RPM)
$31 = 0 (Minimum spindle speed, RPM)
$32 = 0 (Laser-mode enable, boolean)
$100 = 200.000 (X-axis travel resolution, step/mm)
$101 = 200.000 (Y-axis travel resolution, step/mm)
$102 = 200.000 (Z-axis travel resolution, step/mm)
$110 = 3500.000 (X-axis maximum rate, mm/min)
$111 = 4400.000 (Y-axis maximum rate, mm/min)
$112 = 3000.000 (Z-axis maximum rate, mm/min)
$120 = 240.000 (X-axis acceleration, mm/sec^2)
$121 = 240.000 (Y-axis acceleration, mm/sec^2)
$122 = 240.000 (Z-axis acceleration, mm/sec^2)
$130 = 432.000 (X-axis maximum travel, millimeters)
$131 = 432.000 (Y-axis maximum travel, millimeters)
$132 = 95.000 (Z-axis maximum travel, millimeters)

Below's a video of both motors while I issued a jog command of 100mm. Note that I detached the lead screws because I wanted to make sure that that wasn't causing the motors to stall. I also ensured that all wirings are properly connected. 




Any idea what could be causing the issue? 

Thanks!

[Derek the Admin]

I can’t tell too much from the video. Are both motors turning smoothly or are they erratic? It looked to me in the video that both motors were turning smoothly but one was turning slower than the other. Usually that means that the jumpers are different underneath a stepper driver. Do you have jumpers under both stepper drivers? Are the jumpers on M0 and M1 and bridging the same direction? I expect that this would be the cause of that. If not, I’d suggest taking off the stepper driver for the motor that is turning different than it should (8mm step should be one full rotation) and replacing it with the spare.

[bogarts]

Jan 22, 2019 12:51:57 GMT Derek the Admin said:

I can’t tell too much from the video. Are both motors turning smoothly or are they erratic? It looked to me in the video that both motors were turning smoothly but one was turning slower than the other. Usually that means that the jumpers are different underneath a stepper driver. Do you have jumpers under both stepper drivers? Are the jumpers on M0 and M1 and bridging the same direction? I expect that this would be the cause of that. If not, I’d suggest taking off the stepper driver for the motor that is turning different than it should (8mm step should be one full rotation) and replacing it with the spare.

Thanks for the feedback, admin. To answer your questions:

Jan 22, 2019 12:51:57 GMT Derek the Admin said:

I can’t tell too much from the video. Are both motors turning smoothly or are they erratic? It looked to me in the video that both motors were turning smoothly but one was turning slower than the other.

Yes, both motors are turning smoothly with the one on the y+ side ( second in video ) turning very slowly.

Jan 22, 2019 12:51:57 GMT Derek the Admin said:

Usually that means that the jumpers are different underneath a stepper driver. Do you have jumpers under both stepper drivers? Are the jumpers on M0 and M1 and bridging the same direction? I expect that this would be the cause of that.

I’ll verify the jumpers and their orientation and see if that resolves the issue.

Jan 22, 2019 12:51:57 GMT Derek the Admin said:

If not, I’d suggest taking off the stepper driver for the motor that is turning different than it should (8mm step should be one full rotation) and replacing it with the spare.

Okay, I forgot about the spare. I’ll try to look for that and in the meantime just swap the drivers with either the x or z.

Will provide update later.

[Derek the Admin]

Sounds good. Keep us posted and we'll get you taken care of.

[bogarts]

So update...

It works now! The culprit was indeed the driver so I had to use the spare.

Before I did that I made sure and checked that the jumpers were in the proper place for all drivers, checked for any lose connections, cables not plugged in correctly. I also tried swapping drivers around and theres always one motor not turning as fast as the others and it will always be the motor connected to the driver originally from Y.

Thanks again for the help Derek the Admin, I have a fully functioning Carve King already and can’t wait to try it out on a real project.

[Derek the Admin]

Awesome. Congrats on the build.

[bogarts]

Thanks

[Bruce]

Congratulations on your new Carve King Build!