Hi everybody,
I have some really interesting update on The 5 axis kinematics, i found a good and really flexible "slicer" solution. Mp if you are interested .
PS : I am looking for Rhino Grasshopper geniuses btw.
Regards.

@nhof Actualy i didn't try this one. But I managed to do it on a Mac OS. Thanks

Hello,

I have a panelDue 5i.

Recently I was using the screen and suddently it went white...
I have followed some topic about similar problems. I have installed Bossac 1.8 and if I connected the panel to the usb port.

I have looked in the Windows=>Port manager and the usb is detected but this message appears : USB Unkown.
Normaly I should See Bossa port.
I don't know what to do.

Do you have any clues ?

@bearer
Ok thank you it's much more clear now.

I mean that If I understood well I need to acquire data on an external Arduino circuit and to use this data to control the duet.
But how can I do to communicate between the duet and the external circuit ?

@bearer
Ok I get it but how am I supposed to communicate between an external circuit and the duet boards ?
Is there a easy way to do that ?

@bearer

Ok sorry, I wasn't aware of linear encoder for pneumatics.
I think your right, it's a great idea I will try to learn about step/dir interface .

I just want to point out something :

Today I am able to regulate the pressure of my pneumatic circuit for each syringe by controlling 2 supplementary Axis. (U and V)
By controlling the motors I am turning the knob on this type of pressure regulator :

Thus changing the pressure.

So if I understood well, I have two/three options then :

• Option 1 (Yours): Use the step/dir interface from the duet to know the position of the piston with a linear encoder and communicate from the duet to an Arduino circuit in order to regulate the pressure thus monitoring the piston position. (Have a PID loop with pressure output / Position input)

• Option 2 (Mine) : Use an external Arduino circuit in order to read the pressure of each syringe and communicate to the Duetboard in order to control my U & V axis thus changing pressure.

• Option 2 (Mix) : Use the duet to know the position of the piston with a linear encoder, read the pressure with an external Arduino circuit and use those 2 informations in order to control my U&V axis position on the duet to regulate pressure and thus piston position.

My guess : Use the wifi module esp8266 in order to send command to the Duet web interface and vice versa ?

Tell me if I'm wrong.

Thanks for your patience,

Tom Samson

@bearer : In my case the linear travel of the piston is not controlled by any motor (threaded rod pushing the piston or augerscrew feeding)
In my case : A constant air pressure applied on the piston cause the piston to travel.

This system allow to use High pressure and High throughput and is the standard in the dispensing industry.

Do you know If I could wire a pressure sensor on the duet board and read the input.

How can we use the unused input of the Duet wifi Board ?

Thanks,

Hello Duet Community,

I am currently building a 5 axis Manufacturing plateform which going to be open source and be released soon by the name of MMMM.

I am reaching to you because I want to implement the use of pressure sensor with the duet wifi board. Like this one

Why using a pressure sensor ?

One of the feature of the MMMM machine in the dispensing and mixing of 2 part resin like silicones and polyurethanes.
In order to do that, a double acting dispensing valve can be used.
Those dispensing valve are controlled with a 5/2 solenoid valve. By controling the solenoid the material extrusion is stopped or started

In order to deliver material the double acting dispensing valve is fed by a pressurised syringe like this one filled with the material of your choice.

One of the problems is that the amount of material feeded to the dispensing valve depend on the pressure of the pneumatic syringe and the viscosity of the material.
By monitoring and thus controlling this pressure the output could be numerically controlled which is really interesting.

What do you think ?

Could it be possible to use the temperature sensor pin and some modified firmware in order to display a pressure on the duet Panel and on the Web Interface ?

Sorry for this long explanation but I want to be clear .
Regards,

reFlexlab

Hello, I am coming back to this subject.

Maybe this is a simple question but I am trying to use the unused pin on the DUET wifi.

I plan to use the M670 command, in order to successively control output ports during moving..

They are area of shadow in the use of the M670 command.

For exemple if I want to trigger two output ports : 20 and 22 which are fan output pins (chosen with this help) :

I want pin 20 off and pin 22 on during the moove I will send this command :

M670 P20:22
G1 P0:1 X... Y... Z...

Is it correct. Thank you

reFlexlab