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Update!

Yes the schematic is wrong as compared to the wiring diagram .

Many component values on the schematic are in correct .

I have a spare unit and i was able to repair some of the tiny...

Thanks for the help ,
I have reached that point myself but the actual component location is still eluding me as it is possible that the 12 has been disabled by something.


Things will be more...

Yes, That's it....try and find it on the PCB,

I am unable to ....perhaps Im getting old .

Hi all,

I don't know if this is a warning or a request for help .

I am trying to track down a input problem where I have 3v on all my inputs (disconnected) (no load).

Looking for the 12v...

ok,
you can ignore the home switches ..use them when you understand how they work ..they will have no effect...just turn soft limits off in mach3 (click the "soft limits" in the main screen so that...

here is g540 Metric with chinese cnc ..the axis directions will depend on your wiring.
this setup has 3 home switches all connected to the same pin (only one input used)
it also has a hunyang vfd...

Russel,

I think you may have to play with step low active and dir low active on motor outputs . one at a time and remember to reload mach3 as somethings dont change unless it is reloaded .it was...

They look a lot better and could not be as bad as the older ones ..what are the wires like ? Can you run 10 hours with no step loss?

Short answer G540

Welcome guys !
I have not posted here for a year or so but have been busy with my 2 6040 chinese machines

Just to Restate here and of course it is everywhere on many threads that The chinese...

ok what solved my z noise was to change the step dir on motor out puts.
It had something to do with noise from the parallel port of the pc ,or a eartrh loop...but I also fitted a seperate wallwart...

Sorry it has been a few weeks since i set them but you will have to change mach3 as well ..you need to get your head around the step vs acceleration vs movement .

Just swap you boards and confirm...

Yep I had this exact problem.

You have a faulty axis driver board

Swap x and y boards and you will see it changes .
What you have is one microstep not functioning in the driver chip

You...