Home Switch Problem

[m_c]

Does the voltage change when you work the switch?

[Kev2960]

I don't have a manual for the bob just for the machine itself. ive enclosed some photo's of the bob and the main board

[john swift]

Hi Kev

the photo of the breakout board is not close enough to read the lables for the connectors

is this correct ?


also does this 24V DC LED indicator light ???


John

[Kev2960]

Hi John sorry for the delay in replying iv'e just got in from work. The top photo of the bob you've labeled is correct, and the led is lit when powered up

[john swift]

Hi Kev

going by the LED indicators the board has the DC supply OK
and the onboard 5V regulator is working
so I would of expected the board to work

with out a board to test my self I'll have to do another web search to see if I can find any more information

John

[RickyTerzis]

Hi...as per my knowledge when the limit switch is closed, the EL817 opto isolator's NPN transistor will ground the printer ports input pin. The breakout board does not have any pull up resistors to ensure a printer port input is at a valid logic high when the limit switch is open.

assembly circuit