Short snippet of it working.
https://youtu.be/Ruf0Oo334ZM

Alot of slop in the original stepper motor gears. May need to change that out for somthing better. Or see if i can fix it at all.

But its a start! Thats what prototypes are all about!

~Russ

wow, that's all i have to say...

https://www.youtube.com/watch?v=yPXUmXTCtok
https://www.youtube.com/watch?v=aq7Zv-7jEf8

~Russ

Progross ! Got the motor and gear system all ready for testing.

Alot more to do.. but a little at a time...

~Russ

Had to re build the motor to make it 24V bipolar...

so i want to design some other kind of Z probe. so i decided to test a bunch of micro switches. here is the result:

https://www.youtube.com/watch?v=BLzCeH1hS9g

excel work book here:
http://open-source-energy.org/rwg42985/russ/Projects/3D%20printer/micro%20switch%20Z%20probe%20Data/Z%20probe%20Testing,%20Micro%20switch%20&%20Others%20Data%20RWGresearch.xlsx

So the results for contact to contact were: Total Deviation From Mean: 1.24 um Total max / min : 3 um

what is interesting to me is that most of the values were always in increments of .003mm

so basically my Z resolution is the best i can measure… with the way the firmware works.

ok, hope this is interesting / helpful.

I would love to see others try this simple test with there Z probe.

[h]Micro Right Click Save As[/h]
Here is the micro's:
36 probes 1 point. (Run 2 times and post results for each! )

http://open-source-energy.org/rwg42985/russ/Projects/3D%20printer/micro%20switch%20Z%20probe%20Data/Probe_Testing_moving_100-100_probe_0-0_25_Point_p_values_.gcode

This moves the endefector around then probes back to the same point. ( also run 2 times and post your results)

http://open-source-energy.org/rwg42985/russ/Projects/3D%20printer/micro%20switch%20Z%20probe%20Data/Probe_Testing_Single_Point_36_probes_P_values.gcode

I ran each of those 2 times and calculated the deviation and total max / min difference with all the data ( so a total of 122 probes)

if yo post your results here i can add it to my chart, I'd be interested to build a database of probes and results,

just run the above and post you data like this :

10:14:57 AM
M98 P0:/macros/probetesting/Probe Testing moving 100 -100 probe 0,0 25 Point.p values .gcode
Bed probe heights: -0.078 -0.075 -0.078 -0.078 -0.078 -0.075 -0.075 -0.075 -0.072 -0.072 -0.072 -0.072 -0.072 -0.072 -0.075 -0.072 -0.075 -0.072 -0.072 -0.072 -0.075 -0.075 -0.072 -0.072 -0.078, mean -0.074, deviation from mean 0.002
10:10:11 AM
M98 P0:/macros/probetesting/Probe Testing moving 100 -100 probe 0,0 25 Point.p values .gcode
Bed probe heights: -0.078 -0.069 -0.069 -0.069 -0.069 -0.072 -0.072 -0.075 -0.072 -0.072 -0.072 -0.072 -0.072 -0.072 -0.072 -0.072 -0.072 -0.072 -0.072 -0.072 -0.072 -0.075 -0.072 -0.075 -0.072, mean -0.072, deviation from mean 0.002
10:05:41 AM
M98 P0:/macros/probetesting/Probe Testing Single Point 36 probes P values .gcode
Bed probe heights: -0.078 -0.078 -0.075 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078 -0.078, mean -0.078, deviation from mean 0.001
10:02:31 AM
M98 P0:/macros/probetesting/Probe Testing Single Point 36 probes P values .gcode
Bed probe heights: -0.053 -0.063 -0.063 -0.066 -0.066 -0.066 -0.069 -0.069 -0.069 -0.069 -0.069 -0.066 -0.069 -0.069 -0.069 -0.072 -0.069 -0.072 -0.072 -0.072 -0.072 -0.072 -0.075 -0.069 -0.075 -0.075 -0.075 -0.075 -0.072 -0.078 -0.075 -0.075 -0.075 -0.075 -0.078 -0.075, mean -0.071, deviation from mean 0.005

and i will add the rest to my work book for you.

give a short description of what your using for probing!

Thanks!

~Russ

Hello everyone, i'm posting this here to to keep the discussion going, however i already made the post on my other thread so i will link you to the other post, as well as copy some of the things i'm trying to do here in this thread.

Please see here for more info: https://forum.duet3d.com/post/63677

I created a flat coil winder using the duet controlled delta i built,
here is a few videos of it working:

https://www.youtube.com/watch?v=KP2G4fE0ssI
https://www.youtube.com/watch?v=yj8OHuxBzAg

It even made it to hackaday, that was cool,
https://hackaday.com/2018/06/16/delta-printer-morphs-into-cnc-flat-coil-winder/

I do have a request, in order for this to work correctly, i need to find a way to make a stepper motor turn the cam follower head in the direction that I'm trying to lay the wire, This way i can control precisely where i lay the wire and i dont have to rely on the wire to " pull" the cam around. right now there is an offset between the roller and the zero point of the Gcode / indefector.

Dose anyone know if there is a way i can use the extruder motor out put ( or an extra output to a driver) that i can automatically tell it to move in accordance to the direction that the endefector is moving?

The alternative is to offset the Gcode so that the cam follower is in the correct place. if i wanted to place the wire exactly, or make sharp corners i can have to offset this. very hard thing to do.

I thought about trying a drag knife type Gcode editor for corners. but that's not a good option. because the radius of arcs or any moment really is going to be off set.

so the best thing is to have a motor that can move the head around to make sure it fallows the current direction on the fly. then i can make the roller in the zero location and have no offset. right now there has to be an offset or the wire / roller will not work correctly.

If there is any possible way to do this with current duet functionality or G code script... please let me know,

if there is not please let me know if you'd be interested in making a script or some type of program / addition to the duet that can do this.

to be clear, I want to drive a stepper motor that would be turning the cam follower (360 deg) so it always was trailing the direction of travel. and for this to be done internally on the fly or from a gcode script that would add the extra g code to do this, using the already created G code for the wire placement.

This would also be helpful for a drag knife type tool...

here is just a photo of some # 40 AWG wire with a gap, this is a bifilar coil...

Thanks for any input and help / feed back. positive criticism is welcome

god bless!

~Russ Gries

Thanks, yeah there are a lot of possibility's for this. thanks for the feed back.

so, after more searching I found that using the proper words help in searching "_"

it seems what I'm looking for is a tool path gcode generator for a "tangential knife" this is the other version of the drag knife but the tangential knife id motorized to face the proper direction...

here is a few things i found:
https://github.com/adamLange/wireCAM/tree/edgeslice

https://github.com/jamesd256/gcodetools/tree/manual_path_selection
http://www.cnc-club.ru/forum/viewtopic.php?t=35
new version : http://www.cnc-club.ru/forum/viewtopic.php?t=35#p140

the first on there i have know idea how to use, the second is for inkscape

not the best solution for what I'm trying to do but it might work for testing.

in the end id rather have the a type of script that adds the G code according to the direction already in the G code.

its a start...

ill keep looking and trying to find some one who can help in this path of "tangential tool path" Gcode editor...

unfortunately any already defined software / add on is not the best option...

also mach3 also supports tangential knife...

oh man i'm in over my head... i need a script to directly edit the gcode...

any software guys / gals out there?

~Russ

Progress.. a short video of it working! well just proof it can be done but a lot more to do in the G code script...

https://www.youtube.com/watch?v=0EYsK1X155M

I'm not so sure using the extruder output is going to work.
due to how its controlled in the firmware. I have two choices from what i can see.

1. try to hack some thing to let me move the extruder before the move but on the fly. ( no waiting)
2. wait every time it has to move by placing it on the next line by its self... not a good option for fast coil making...

The other option is to use the U axis and try to make absolute movements work...
I wonder if I'm still going to have the same problem with that too...

feed back please.

Thanks for the help everyone! I can see us all cutting vinal, cloth, paper, cardboard, leather? ... and for me ... making coils!

~Russ

47.5 AWG wire. about 1000 turns, 4.186 Kohms. That's a lot of resistance!

Its funny you cant even see the wire going in to the tool...

not to bad. got a bit of a slip there in the center.... more to tune still. also the roller play's a roll. Get it... ha,
on i'm slap happy...

God Bless,
~Russ

Hello,

Just about everything is documented on this playlist. :

https://www.youtube.com/playlist?list=PLsiIKXpZfLKI-UXGFdXYS2groWniI-Eh5

If you want to know why i built it. Its to build this:

https://youtu.be/ivPsGxCXyPA

And test some theories...

~Russ

https://www.youtube.com/watch?v=jmNTSxDMqxM

47.5 AWG wire. about 1000 turns, 4.186 Kohms. That's a lot of resistance!

Its funny you cant even see the wire going in to the tool...

not to bad. got a bit of a slip there in the center.... more to tune still. also the roller play's a roll. Get it... ha,
on i'm slap happy...

God Bless,
~Russ

https://www.youtube.com/watch?v=QfoMRPy4bJk

still a lot more to do... but its looking good.

~Russ

wow, that's all i have to say...

https://www.youtube.com/watch?v=yPXUmXTCtok
https://www.youtube.com/watch?v=aq7Zv-7jEf8

~Russ

@danal said in Requests for help: Gcode cam follower/ tangential knife control.:

@russ-gries said in Requests for help: Gcode cam follower/ tangential knife control.:

Also, are you able to make a simple script program that has an in interface for such a G code generator?

Probably. Let me "check assumptions" on my end. Inputs to such a generator for "cylindrical" coil wraps would need to be:

• Core diameter (what the wire would be wrapped around, even if removed post wrapping).
• Core "length" or "height". In other words, first wrap at z=0 and last wrap at Z=this parameter.
• Wire diameter
• Number of layers
• Packing - even or offset (see below)
• Fudge factor for packing density. Could be called "tightness".

What else?

Even Packing:

OOO   OOO
OOO   OOO
OOO   OOO
OOO   OOO
OOO   OOO
OOO   OOO

Offset Packing(would really be half spaced, characters will not show that properly)

OOO    OOO
 OOO  OOO
OOO    OOO
 OOO  OOO
OOO    OOO
 OOO  OOO
OOO    OOO
 OOO  OOO

And, is there a need for "non cylindrical" winds? Donut/Torus or similar? Those are probably beyond a simple script. Examples:

     OO    OO
    OOO    OOO
  OOOOO    OOOOO
 OOOOOO    OOOOOO
  OOOOO    OOOOO
   OOOO    OOOO
     OO    OO
   

     OO    OO
   OOO      OOO
 OOOO        OOOO
OOO            OOO
 OOOO        OOOO
   OOO      OOO
     OO    OO
   

I will sendyou a PM and descuss this further!!

Thanks
~Russ

One step closer...

https://youtu.be/2Jksxj-7JEM

https://youtu.be/5zuiqzTgi_U

But still alot to do.

~Russ

Ok, still haven't had time to sit down and respond to posts... will do shortly.

However i have managed to get this done.

https://youtu.be/lqoa55_MOiY

A proper video will be posted on my main YT when its time...

~Russ

@dc42 said in Firmware 2.02RC2 released:

@russ-gries said in Firmware 2.02RC2 released:

also, i have a stepper motor that only draws 40ma max. is this why i get this message or is this known error?

That is likely a contributing factor. I'll change so as not to generate the message when the stepper motor current is set very low.

Btw the current on the Duet WiFi/Ethernet is only adjustable in steps of 100mA, and the minimum is 100mA (peak).

Thanks.

I also switched to a bigher stepper motor, running at 200ma and it still happens alot. However the other steppers running at above and amp still dose it from time to time.

It happens more when Im moving things manually, or homing.

~Russ

Thanks for the feedback everyone. I will reply to comments sooner than later I hope.

In the meantime I decided to use a stepper motor directly as my tool end. This mainly to reduce any backlash and confusion between how many steps per revolution Ect. Right now I'm using an unknown stepper motor with a very large gear reduction which I cannot tune correctly. (I also re built it for bipolar). It also has a tremendous amount of backlash in the gears and renders it almost useless for this application. It's also not fast enough so I decided to dig through my Box of steppers and I found these really nice point 9ﾟ steppers. I ended up drilling a hole down the center and I'm going to attach my tool end directly on the shaft. This is a nema 17 which is quite large and heavy, but this is to prove the concept it will work, and because it was free in my bin of parts.

Yeah that hole sucked to drill... but i got it!!

Here's a few photos
I'll post more later
Thanks
~Russ