[Curran]

Hi Gerry,

Did you have a chance to take a look?

[ger21]

I loaded your profile, but since my desktop is running windows 10, I can't really test anything, or see why it's not working.

I just looked at the screen, and the LED flashing is the default behavior, so it appears that it should be working. I was wrong before.

What I would do is try to measure the voltage on the output pin for the relay at the port, to see if it's changing state.

[matc493]

I found if I have the USB connected the relay is always closed (the 5v from the USB is directly connected to the relay) and if it's not connected it's always open. I can control it through mach3 even though my settings are exactly the same as the PDF I attached. The pwm output works though (as does everything else) so I assume the settings are correct. I have 2 of these break out board and they work the same so I don't think it's a faulty break out board either.

i find out that you need the 5v usb to work the relay. did you found a way to avoid that? because i dont know how to conect my kl-8056D to 5v pins

[john-100]

you need the 12 to 24V supply to power the limit switch circuits and the PWM to analogue circuit
and you need the the USB cable to power the two 74HC245 octal buffer IC's and the relay

with the jumper next to the relay installed ,
a high level logic level (over 3V) on printer port pin 17
will be switched on the relay

without the USB cable ,
the CMOS 74HC245 buffers can only work by virtue of some of the printer port pins being at +5V
and powering the IC via the internal protection diodes
note the IC outputs will be lower than they will be when powered correctly by the USB +5V

Attachment 394984

in the photo
if you look at the 3 terminals to the right of the output P1
you will see one labelled PC GND and two PC +5V

depending on how you wire the kl-8056D

you can either use the PC +5V as a common positive to the kl-8056D step & direction inputs

or use the PC GND terminal

John


PS

the TX14175 found in some 6040 control boxes
has 5V regulator & 5V to 5V DC converter to generate the isolated 5V supply for the IC's


Attachment 394986

[mactec54]

Any ideas why?

Yes in motor outputs

Spindle Dir Low Active should be unchecked, there PDF is incorrect, then you will hear the relay turn on / off when you toggle spindle control buttons,

The Breakout Board also needs a 5v Dc power supply either from the USB or 5v connected direct to the correct 5v input terminal, you can't have both, one or the other

[mactec54]

i find out that you need the 5v usb to work the relay. did you found a way to avoid that? because i dont know how to conect my kl-8056D to 5v pins

You need to connect a 5v dc power supply and a 12v dc supply to make everything work on the board, the USB connection can be used for the 5v supply, but it is always better to have an independent 5v supply

[john-100]

if you connect a 5V power supply to the PC GND & PC 5V terminals as suggested by Mactec54

you have to ensure you connect the supply correctly as there is no reverse polarity protection powering the board that way

also do not connect the USB cable and external 5V power supply as it is very likely to damage the USB port

John