Search:

There's something I'm still not getting here.
I removed the jumper. So the relay does not come on. But pin 17 still goes high as soon as the BOB gets power, even if the PC is not on. So a new...

Thanks. What difference does changing the jumper make? Won't pin 17 be the same whether or not the BOB relay is being used?

Also, I don't quite understand the hi/low trigger thing. If I wire the...

I have one of the generic Chinese breakout boards like this
https://www.ebay.co.uk/itm/274524902217
When it is powered up but not connected to the PC, the input pins go high. This is fine except...

OK - the driver module was faulty! (Maybe I blew it up but I don't think so).
With a new module, it's driving the motor fine. Now I have to get my head round the microstep settings but that can wait...

I'm using separate drivers like this
https://www.ebay.co.uk/itm/352981992806
At the moment just using one, for one motor.
There is no voltage on the EN+/EN- pins. (There is also no voltage across...

OK thanks for that.
White/orange and black/red are definitely coils. As you say, they resist turning when the pairs are shorted. Also my inductance meter shows 3.5mH each which is the right ball...

I don't quite understand the criticism. I connected the driver, connected the motor, turned everything on, nothing moved. I measured the voltage on the A and B pins - a constant 18V. I switched off,...

Well something is not right. I connected the wires as suggested. I am sending the pulse from the BOB to pul+ and the direction to dir+ These are getting through as shown by the 'scope. I don't have...

OK thanks. (What could possibly go wrong? ...)

In fact, although the datasheet says they are unipolar, the documentation for the mill says that only four of the six wires are used: red, black, orange and white. Blue and yellow not connected. So...

Fantastic, thank you. According to the datasheet the correct voltage is 24V so this is what I will give them.

Hello

I have a Denford Minimill (aka Sherline in the US). I have fried the main control board (long story) and despite replacing lots of the components I'm still not making any progress in getting...

Hello

I have a Denford Micromill 2000 which has been adapted with a breakout board so that it can use open source software.
It was working fine but unfortunately I seem to have blown up the...