Error in "home" and "Auto-Home", trajectory error in Y axis, possible power failure

I have a serious problem with my machine

I currently have the SulpFun s30 with the expansion kit, its size is 935x905, 2 sensors, the first in the lower left corner (viewed from the side of the control box), and the second on the left side of the bar. My problems are:

-When I configure the “home” on the lower left side, the X axis is inverted, I tell it through the lightburn that it goes to the left and goes to the right, the Y axis remains unchanged.

-When I configure the “home”, in the lower right corner the right

-With the “home” in the lower right corner, when making cuts, the machine has a kind of “Micro-Blackout” in which it seems that the power of the motors and the lazer is suspended, the cut goes very badly since The machine changes direction a few millimeters, the cut no longer comes out like in lightburn

I would greatly appreciate your help with this, I have been trying to solve this problem for more than 1 month now.

PS: all these problems started when placing the expansion kit




Isn’t there also a config. file that goes along with the expansion kit?

1 Like

What do you mean by configuration? The only change I made was the power adjustment of the Y-axis motors, it is simply turning a type of nut 90 degrees and changing all the cables for longer ones that come with the same expansion.

Home on the S30 should be the front-left corner. Get that right first. Home is a fixed position and does not move.

Adding the extension kit changes nothing, unless you inserted one or both of the extension cables wrong. I am not positive the cables are made properly, so we will do some checks after you confirm they are plugged in properly (ribs are in the slots).

Home the machine and Jog the head around. Does it move in the correctly in all 4 directions?

You are missing one other detail. You did not say you changed the GRBL parameters for X ($130) and Y ($131). These are for MAX travel along each axis.

Depending on the expansion kit, you might have had a small adapter cable to change the x-axis direction. For the S30, that’s not required. Maybe you added it as well.
Before dealing with the homing, correct your axis setup. Use the arrow buttons, if one of the axis is inverted, go. Open machine settings and invert the direction of that axis.
Then you can correct homing, this will be relative to the axis direction, that’s why you need to do it after the first step.

Side note: do NOT turn the potentiometer for the reference voltage by 90 degrees, this caused trouble for many users. Turn it 45 degrees, that’s better.

The limit sensors are in the front left corner, the module where all the cables connect in the lower right corner.

The cables have different colors and pins, I’m sure I connected them correctly, I’ve already double checked.

Placing the “Home” in the front left corner inverts the X axis, the workaround was to place the “Home” in the front right corner, for some reason that causes the X axis to not invert. Today I was doing some research and I saw that the axis can be inverted, so with the “home” setting in the front left corner, I inverted the X axis, and it works “normally”, but when I press “Home” it gives me an alarm:
ALARM:8
Return failure. The cycle failed to clear the limit switch on startup. intention
increase the extraction setting or check the wiring.
(I’ve already looked for solutions on the internet but nothing seems to work for me, I’ll keep looking)

Do the MAX and MIN parameters refer to the size of the printing area? According to the manufacturer, they have measurements of 935x 905mm. I already made the modification when adding the device.

PS:tx for the help

The machine came with the adapter cable, but I didn’t put it on
I did exactly that, I inverted the X axis, but the “Home” now gives me an alarm:
ALARM:8
Homing fail. Cycle failed to clear limit switch when pulling off. Try increasing pull-off setting or check wiring.

Thanks for the advice, I didn’t know, so instead of doubling the power it would be increased by 1.5?

I too have the S30. Enter $$ in the Console window, which will list the GRBL parameters. Then copy and paste them in a Reply. I will compare them to mine.

You can’t make the front-right the home position because the Xaxis limit switch is on the left side of the gantry. You have parameters set wrong and that is why the incorrect motion is happening.

No, it does not bring a configuration file, in fact the installation must be done through video tutorials. If you have the configuration file I would greatly appreciate it, I have the SculPunf s30 with the XY expansion kit

The Sculpfun S30 series does not use, or need, a configuration file. It is set at the factory to be ready to go. The only parameter I had to change on mine was $32=1 for the laser.

$0=10

$1=25

$2=0

$3=5

$4=0

$5=0

$6=0

$10=0

$11=0.010

$12=0.002

$13=0

$20=0

$21=0

$22=1

$23=4

$24=200.000

$25=3000.000

$26=500.000

$27=6.000

$30=1000.000

$31=0.000

$32=1

$100=78.431

$101=80.000

$102=250.000

$103=100.000

$104=100.000

$105=100.000

$110=6000.000

$111=6000.000

$112=1000.000

$113=1000.000

$114=1000.000

$115=1000.000

$120=1000.000

$121=1000.000

$122=1000.000

$123=200.000

$124=200.000

$125=200.000

$130=905.000

$131=935.000

$132=200.000

$133=300.000

$134=300.000

$135=300.000

ok

The “home” is in the front left corner. Previously it was configured in the front right corner because the X axis was inverted because of that, I simply inverted the It makes a kind of bad cut, I will attach images




I already have that parameter configured

You now have a copy, so you can change them baci if you want.

$3=4
$5=1
$22=0 - Must have limit sw on both ends of travel (4 switches total)
$23=7

Change these parameters, power off the machine, move the head away from all corners, and power it up. If Lightburn is still running, it should Home automatically.

Either there or in the console window.

Are you changing values? The Machine Settings window does not match what you copy-pasted from the Console window.

OK, thanks a lot
The machine is moving towards the front right corner, the sensors are in the front left corner

$0=10

$1=25

$2=0

$3=4

$4=0

$5=1

$6=0

$10=0

$11=0.010

$12=0.002

$13=0

$20=0

$21=0

$22=0

$23=7

$24=200.000

$25=3000.000

$26=500.000

$27=6.000

$30=1000.000

$31=0.000

$32=1

$100=78.431

$101=80.000

$102=250.000

$103=100.000

$104=100.000

$105=100.000

$110=6000.000

$111=6000.000

$112=1000.000

$113=1000.000

$114=1000.000

$115=1000.000

$120=1000.000

$121=1000.000

$122=1000.000

$123=200.000

$124=200.000

$125=200.000

$130=905.000

$131=935.000

$132=200.000

$133=300.000

$134=300.000

$135=300.000

I made the changes you told me

So now it tries to go right instead of left when Homing?

If it does, make sure the Xaxis plugs are inserted correctly, both at the motor and near the controller box.

We will get to the “bad cut” issue once we get motion under control.

I explain, my previous problem was that when I placed the “home plate” in the front left corner, the X axis was inverted. When placing the “Home” in the front right corner the X axis worked normally, the solution I found was to invert the X axis in the machine configuration, and that is how I currently have it

The cables are in the correct order

thanks for the help I really appreciate it

Ok. Does it home on the left side or the right side now?