Posts made by mpentenr

@mpentenr said in Using Duet 3Mainboard with external stepper drivers:

@dc42 Are there any news on this topic ?

Hi dc42, are there any news on driverless duet3 or addon boards for driving motors with external drivers ?!

@mpentenr said in Using Duet 3Mainboard with external stepper drivers:

@dc42 said in Using Duet 3Mainboard with external stepper drivers:

Thanks. Are you using the encoder input on the stepper driver for the pellet extruder? What is the maximum rotation speed needed by the pellet extruder motor?

No, I am not using the encoder input (at the moment, perhaps I need to).
The max rotational speed will be arounf 500 rpm, because of an 10:1 gearbox on the stepper, so up to 50 rpm at the pelletextruderspindle

At the moment the pellet extruder is highly experimental, so I don't know the exact values. Time and experiments will show

@dc42 said in Using Duet 3Mainboard with external stepper drivers:

Thanks. Are you using the encoder input on the stepper driver for the pellet extruder? What is the maximum rotation speed needed by the pellet extruder motor?

No, I am not using the encoder input (at the moment, perhaps I need to).
The max rotational speed will be around 500 rpm, because of an 10:1 gearbox on the stepper, so up to 50 rpm at the pelletextruderspindle

@dc42 Hi, on the 3 axis I am using 1KW 380V Servo Motors and on the pellet extruder, I am using the following:
Motor Driver: https://us.nanotec.com/products/1768-c5-e-2-09-motor-controllerdrive-for-canopen-or-usb/

Stepper motor: https://us.nanotec.com/products/574-st8918m6708-a/

@dc42 said in Using Duet 3Mainboard with external stepper drivers:

@mpentenr said in Using Duet 3Mainboard with external stepper drivers:

@dc42 Are there any news on this topic ?

Not yet. Now that we have the prototype Tool Board, there are two ways we could support external drivers without needing a new main board:

1. Do a version of the EXP3HC board with outputs for 3 or just possibly 4 external stepper drivers instead of on-board drivers. This would probably be best for those who are actually using external drivers, not step-servo motors. But we don't expect many people to need external drivers with Duet 3.

That would be my favorite, because of my 2pt100(bed) and 3K-Type Thermocouple (Pellet Extruder) which I cant connect to the tool board or is it possible to use thermo connectors on one board and step/dir/ena on another board for one "axis/extruder"? I also would need 2 of these boards, because of the 3 (X/Y/Z)axis with external drivers and up to 3 external drivers for the (pellet)extruders.

2. Do a version of the Tool Board that has a single set of step/dir/enable outputs, to drive a single external driver or step-servo drive. I think this might be better for those using step-servo motors with built-in controllers.

Please take into account, that the Vin for example for my pellet extruder is 48V, when designing the driverless Tool Board with step/dir/ena output.

Thanks
Marc Pentenrieder

@dc42 Are there any news on this topic ?

Oh, I forgot, I will also need support for up to 6 Thermocouples or PT100 thermo sensors for heated bed and pellet extruder

Hi,

at the moment I will need up to 4.
The 3 main axes and an pellet extruder.
I would be glad to do beta testing of the board, if you want me to.

Thanks Marc

Thanks for your fast reply.
Is there a timeframe when external steppers ,external or special mainboard, will be supported? 3/6/9/12 month?)

Thanks
Marc

Hi ,

is it possible to use external stepper drivers with the duet3 mainboard ?
For my axes (servo driven)I need the step and dir signals and want to know if it is possible to put the axes step and dir signal on the "9 IO headers for Endstops, probes, filament sensors and other low bandwidth sensors."

Thanks
Marc