Limit switches work, but homing does not

I almost hate to ask about this because it is probably something simple. I currently have a CNC router that I built in 2016 which uses an Aduino Uno, DQ542MA drivers, and a 36 Volt power supply. I have never installed limit switches. Four years ago, I decided to try and mill a PCB for the GRBL limit switch filtering board from the grbl wiki.

I purchased all the components, and then life got busy and I never got around to it. I am currently making major changes to the machine and ever since making my lathe with the Blackbox and extension limit switches, I have been sold on homing. So, I soldered everything up and hooked it up. I used some switches that I had already soldered wire to the NC and C terminals to test it out. Had these not already had wire on them, I would have went with NO and C. I must note that all this is being done with extra motors, two extra drivers, and a spare power supply I had available. I set the Control Software so that it is an Acro Laser with 2 axis to test my circuit. Since this was the first PCB I had ever milled I did not want to fry my current CNC control system since it has worked issue free for nearly 6 years.

I downloaded Open Builds Control today on the computer I was using for testing. When I test the switches in the trouble shooting tab of control they function properly and change from green to red then back to green when released. When I jog and trigger a switch, they lock the "machine" like they should. Everything seems to work fine until I hit the "Home" button in Control. I expected the motors to turn, then I was going to trigger the switches, and Control would show the machine as homed. However, when I hit the "Home" button, nothing happens at all. The motors do not turn. Eventually I get an error telling me it could not find the switches.

Here are my grbl settings:

[15:13:23] [ $$ ] $0=10 ;Step pulse time, microseconds

[15:13:23] [ $$ ] $1=255 ;Step idle delay, milliseconds

[15:13:23] [ $$ ] $2=0 ;Step pulse invert, mask

[15:13:23] [ $$ ] $3=1 ;Step direction invert, mask

[15:13:23] [ $$ ] $4=1 ;Invert step enable pin, boolean

[15:13:23] [ $$ ] $5=1 ;Invert limit pins, boolean

[15:13:23] [ $$ ] $6=0 ;Invert probe pin, boolean

[15:13:23] [ $$ ] $10=1 ;Status report options, mask

[15:13:23] [ $$ ] $11=0.020 ;Junction deviation, millimeters

[15:13:23] [ $$ ] $12=0.002 ;Arc tolerance, millimeters

[15:13:23] [ $$ ] $13=0 ;Report in inches, boolean

[15:13:23] [ $$ ] $20=0 ;Soft limits enable, boolean

[15:13:23] [ $$ ] $21=1 ;Hard limits enable, boolean

[15:13:23] [ $$ ] $22=1 ;Homing cycle enable, boolean

[15:13:23] [ $$ ] $23=7 ;Homing direction invert, mask

[15:13:23] [ $$ ] $24=100.000 ;Homing locate feed rate, mm/min

[15:13:23] [ $$ ] $25=1000.000 ;Homing search seek rate, mm/min

[15:13:23] [ $$ ] $26=250 ;Homing switch debounce delay, milliseconds

[15:13:23] [ $$ ] $27=10.000 ;Homing switch pull-off distance, millimeters

[15:13:23] [ $$ ] $30=1000 ;Maximum spindle speed, RPM

[15:13:23] [ $$ ] $31=0 ;Minimum spindle speed, RPM

[15:13:23] [ $$ ] $32=1 ;Laser-mode enable, boolean

[15:13:23] [ $$ ] $100=57.143 ;X-axis steps per millimeter

[15:13:23] [ $$ ] $101=57.143 ;Y-axis steps per millimeter

[15:13:23] [ $$ ] $102=57.143 ;Z-axis steps per millimeter

[15:13:23] [ $$ ] $110=5000.000 ;X-axis maximum rate, mm/min

[15:13:23] [ $$ ] $111=5000.000 ;Y-axis maximum rate, mm/min

[15:13:23] [ $$ ] $112=5000.000 ;Z-axis maximum rate, mm/min

[15:13:23] [ $$ ] $120=500.000 ;X-axis acceleration, mm/sec^2

[15:13:23] [ $$ ] $121=500.000 ;Y-axis acceleration, mm/sec^2

[15:13:23] [ $$ ] $122=500.000 ;Z-axis acceleration, mm/sec^2

[15:13:23] [ $$ ] $130=1300.000 ;X-axis maximum travel, millimeters

[15:13:23] [ $$ ] $131=1300.000 ;Y-axis maximum travel, millimeters

[15:13:23] [ $$ ] $132=70.000 ;Z-axis maximum travel, millimeters


So far I am only into this for about $10 in optocouplers and resistors, and some time (but that was fun). I would not have bothered and just added more extension switches to the order I placed for additional V-slot last night, but my power supply is 36 Volts.

 

I am pretty sure I did when I chose the acro setup.

When I first tested, I was using 3 axis an three switches and I depressed the z first.

I left the stuff at work and will not be able to check today.

Thanks.

 

Apparently when I chose Acro 1515 the Firmware flash tool reset the $5 value to disable. It now works.

 

I spoke too soon. It works in 2 axis laser mode. When I changed it back to a Lead, it only homes the X and Y.

 

I solved it by setting it up as a LEAD 1010 then reflashed the firmware using the tools and wizards. Now it all works as expected.

 

Apparently I am horrible at milling pcbs as well. One of the traces pealed off so I had to go old school on it because I had to see this through. Don't ever give up!

If this wasn't a 36 V power supply, I would definitely have purchased more of the extension switches. Soooooo much easier.