Tonsen 4 Axis Controller/Bob

**EddyCurrent** · 18-12-2013

It says AC beside the socket and as Clive says the diode would indicate this is true.
Pin 1 gets used for all sorts, on my bob it is the charge pump. on others it is marked 'strobe' or 'spindle enable' or operates a relay for 'spindle forward'.

**Pointy** · 18-12-2013

Updated schematic in first post as I made a small mistake with RN1.

Originally Posted by EddyCurrent

It says AC beside the socket and as Clive says the diode would indicate this is true.

I am sure it's DC going in, my Multimeter showed 0 for AC and 24v for DC. It's also coming from the same PSU that drives the stepper motors, wouldn't that be DC?

Regards,

Les

**irving2008** · 19-12-2013

Originally Posted by EddyCurrent

It says AC beside the socket and as Clive says the diode would indicate this is true.
Pin 1 gets used for all sorts, on my bob it is the charge pump. on others it is marked 'strobe' or 'spindle enable' or operates a relay for 'spindle forward'.

the diode is purely for reverse polarity protection. Too many mistakes would give me quality concerns...

**Pointy** · 19-12-2013

Originally Posted by irving2008

the diode is purely for reverse polarity protection.

I assumed that's what it was for but as stated I am no expert.

Originally Posted by irving2008

Too many mistakes would give me quality concerns...

Spelling mistakes are fairly normal for cheap Chinese stuff (you should try and read the manual), but they do not make me worry about the quality.(Touch wood, so far, the electronics have been good)

Regards,

Les

**RSchifle** · 17-07-2018

I'm a complete novice at this. I have this bob on my 3040t and want to add Home and limit switches. Can I just put the switches between +5V and one of the input pins, 10-13 , 15?

**john swift** · 18-07-2018

on some boards the opto-isolators and input connector are not fitted

a photo showing what components are fitted to your breakout board
will make it possible to give you details of how to connect home & limit switches

depending on what you have
you need to connect the switches between the BOB ground and either the connections to the printer port pins 11, 12,13 & 15
or the opto-isolator LED cathode

a while ago I found a circuit diagram of the Tonsen-4-Axis BOB
as it does not look like it's 100% correct I have added a few notes on this