[Yachaan]

If you have trouble with Overcurrent Sensing:
here is an easy way to do it.
Using the accurate free & powerfull LTSpice you can determine the exact current trip point.
Linear Technology - Design Simulation and Device Models
Just alter REFV value with resistor [and maybe the zener too].
Oh, and use the included library file.
See the nice digital out [101 & 010 & a sink!] - I have it swich a digital error swich on the BOB.
Verify your design by running it!
It's easy :violin: :wee::wee::wee:

See how i done it with the Linistepper - but you can use it anywhere:
http://www.cnczone.com/forums/open_s...b-iso-bob.html
[I see I got the wrong schematic there- ill try to get it edited, and I include all the files here.]
This Idea originated from a post on his homepage by Roman Black / RomanLini

Over Temp Warning: it does no good to just shut off in case of temp going to high, you rather get warned to do something.
Blinking lights cannot be seen with your back turned on them. But your ears can still hear!
When things start to get too hot, your Linistepper is going to start barking!
You might get a fright....
See, this is the barking watchdog circuit - you'l find it everywhere on google.

BOARD LAYOUT: If you ever find a neater layout, please let me know so that I can improve!

But hey, nothings perfect! :banana:

If you build this [EAGLE PCB files attached]- i also would like you to inform me. :bs:

[James Newton]

I added a place for a MAX4080 high side current sensor on the 4Axis board for use with the Linistepper or other PMinMO drivers but I've not tested it's operation yet. Has this been tested?
techref.massmind.org/techref/io/stepper/linistep/4axis5build.htm

[Yachaan]

No, therefore the Spice model.
We can always play it by Linear Technology to get a proper answer.
But I see no reason for this to fail. It should be very accurate.
Roman Black's original:
http://www.romanblack.com/current.htm.
I just could not get perfect simulation results with his setup.
This combination - well test it via the simulator and see!

The temp sensor is directly from the LM75 manual.
I should therefore be fine, and remember - it is also just added as a module.

You are so welcome to use any idea of mine if you think it is good enough.