[sudo-discuss] 3d printer solder paste dispensing at sudoroom using rpt2paste

[Adam]

If there were a dedicated machine that didn't lose its ability to
absolutely position, I think it would be much better. Ultimately though I
think morgan has a point that fiddly tolerance will be more trouble than it
is worth.

I have a 3D printer I could assign to the purpose if someone were
interested in making a very rigid paste extruder for it.

- - - -
Weblog: http://adammunich.com
With great power comes great responsibility.


On Thu, Jan 3, 2019 at 10:59 AM <hol at gaskill.com> wrote:

> interested in making some smd Sudouinos once it's up and running. zero
> bandwidth for software development rn on top of limited coding skills
> myself.
>
> On 2018-12-19 2:07 pm, Morgan Allen wrote:
>
> I just kept it to myself, stencils are better.
> Also, did you sacrifice the 3d printer to accomplish this?
>
> On Tue, Dec 18, 2018 at 6:47 PM Jake <jake at spaz.org> wrote:
>
>> seriously no one had anything to say about any of this?
>>
>> On Wed, 5 Dec 2018, Jake wrote:
>>
>> > last night at sudoroom i did some things to get solder paste flowing
>> from the
>> > TAZ 3 3d printer.
>> >
>> > i brought in a compact air compressor and adjusted its power switch to
>> click
>> > off around 100 PSI (since it was failing to reach its design pressure
>> in a
>> > reasonable amount of time and we only need like 40-50PSI for solder
>> paste)
>> >
>> > i'm not sure if it's still working because it cut out apparently due to
>> heat
>> > the last time i was running it, but possibly just because of duty
>> cycle.  It
>> > needs a fitting installed into the outlet to plumb it to the solenoid.
>> > Fittings are in the box behind the printer and there's teflon tape in
>> the
>> > "tape" box on the shelves in sudoroom.
>> >
>> > i installed a three-port solenoid on the 3d printer which plugs in
>> instead of
>> > the extruder resistor / temperature sensor.  It contains a 47KΩ
>> resistor to
>> > simulate a thermistor (to avoid a fault code) and it wires the nozzle
>> heater
>> > wires to the three-port solenoid (which is rated at 24VDC matching the
>> > printer's power supply)
>> >
>> > I piped the 3-port solenoid to a syringe and mounted a syringe holder
>> on the
>> > print head assembly in a reasonable place.  A syringe of solder paste
>> is in
>> > the
>> > sudoroom fridge and can be used.  Needles of various sizes are in the
>> > cardboard
>> > box behind the 3d printer.
>> >
>> > the air compressor's outlet needs to be plumbed to the flexible black
>> hose
>> > going to the 3-port solenoid.  The solenoid needs to be mounted to the
>> print
>> > head (a twist-tie should work).
>> >
>> > unfortunately the 3D printer's firmware seems to be cycling power to
>> the
>> > nozzle
>> > resistor when a temperature is selected, probably because of PID
>> parameters,
>> > so
>> > we will have to look for a set of commands (or modified firmware) to
>> activate
>> > the solenoid properly during the dispensing process.  This printer
>> doesn't
>> > seem
>> > to have wires for a print head fan, which is how we connected the
>> solenoid in
>> > past implementations of this setup.  There will need to be a script or
>> > modification to rpt2pnp to issue the right commands for this setup.
>> >
>> > as a reminder the software for creating g-code to dispense solder paste
>> from
>> > the .rpt file output of a KiCAD circuitboard project is here:
>> >
>> > https://github.com/hzeller/rpt2paste
>> >
>> > note that it's superseded by
>> >
>> > https://github.com/hzeller/rpt2pnp
>> >
>> > which may be newer.  the latter was confirmed to (apparently) correctly
>> > process
>> > the .rpt file from the project we'll likely dispense solder paste onto
>> first:
>> >
>> > https://github.com/fitzdoingprojects/big_battery
>> >
>> > i'll be gone for two weeks but if anyone wants to make progress on this
>> > project
>> > please write back and i'll help as much as i can.
>> >
>> > -jake_______________________________________________
>> sudo-discuss mailing list
>> sudo-discuss at lists.sudoroom.org
>> https://sudoroom.org/lists/listinfo/sudo-discuss
>
>
> _______________________________________________
> sudo-discuss mailing list
> sudo-discuss at lists.sudoroom.org
> https://sudoroom.org/lists/listinfo/sudo-discuss
>
> _______________________________________________
> sudo-discuss mailing list
> sudo-discuss at lists.sudoroom.org
> https://sudoroom.org/lists/listinfo/sudo-discuss
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sudoroom.org/pipermail/sudo-discuss/attachments/20190103/e9fb98f6/attachment.html>