DUET 3D MAINBOARD 6HC WIRING

[SANJR]

Hi,

I am trying to build a custom DIY machine for my research project.
Planning to build this XYZ AXIS MOVEMENT machine with the following
A) 6 Stepper Motors for XYZ Axis Movement
B) 6 End Stoppers, 1 Emergency Button
C) 1 Relay for Controlling the Welding Torch
D) 3 Wire Feeder Motors having Different Feed Rates

Planning to use DUET 3 Mainboard 6HC for the machine, after connecting the Stepper Motors and End Stopper, Emergency Button to the respective PIN's on the board

Where can I connect 3 Wire Feeder Motors and 1 Relay?
Where can I connect these PIN on the Board?

[dc42]

@SANJR please explain what you mean by "feeder motors" and link to their specification or datasheet.

You can connect a bare relay to any of the OUT ports except OUT0. The relay coil voltage must be either the same as VIN, or it can be 12V if you use one of the lower current OUT ports and set the appropriate jumper to 12V.

[SANJR]

@dc42 Hi,
This query is regards to relay for controlling a welding torch. Planning to use an 5V Relay Module, attached an basic sketch of the plan.
Query 1 : Since this a 5V Relay module, should any jumpers be used to ensure the same voltage is provided?
Query 2 : The Trigger switch positive terminal is connected to Common Pin of the relay and normally the torch will be in off condition unless triggered by an signal, hence connected to NO.
Whether the connection between the torch and Relay would suffice the purpose?

[achrn]

Is there a reason why you're using a fan output rather than one of the IO connectors? They do admittedly have flyback diodes, which could be useful if driving a relay coil directly, but you say you're using a relay module, which possibly / probably has an isolator and driving transistor of its own.

Anyway, you've connected to the tach signal, which is an input to the duet, not an output it controls.

Also, the fan output is probably at 12V or VIN (maybe 24V? depends what you've connected), unless you've done something particular with feeding some other voltage in at the jumper. Your relay board probably won't be happy getting a 24V signal.

If it's a 5V relay module I'd connect it to one of the IO connectors. It may or may not work - it depends upon the relay board (some 5V relays boards will respond to the 3.3V the duet produces). Alternatively, OUT9 has a dedicated 5V version of the signal intended for driving lasers or servos, you could use that - it's on a separate set of pins alongside OUT9 & OUT8 on the board.

[SANJR]

@achrn said in DUET 3D MAINBOARD 6HC WIRING:

OUT9 & OUT8 on the board.

Thanks. I would be using the 5V which is near to OUT 8 & OUT 9. Just to make sure I understand things correctly if the signal pin of the relay is connected to out9 pin of the duet 3d connector then we can control the torch ON/OFF.

Just attached modified picture of the same. Requesting to share your opinion.

[achrn]

@SANJR Yes, that looks like it will work.

Assuming your relay module is the same as this page: http://www.techydiy.org/keyes-sr1y-relay-module/ it already has a diode across the coil, and it doesn't have an opto-isolator but it does have a drive transistor, so it shouldn't harm the duet connected directly.

I'd do some testing to make sure you've defined your control signals of the correct polarity and that you don't get a burst of relay on when the duet powers up and so on, and I'm assuming that the relay is appropriately rated for the welding torch, but it looks OK to me in principle.

[SANJR]

@achrn Thanks for the feedback