Let's say you had one of THESE https://a360.co/2RLRoxw (be sure and try
the "explode" control and slider.  It is VERY impressive, no not my work)
and wanted to adapt it for use with LinuxCNC by adding motors.

So your first step is to replace the lead screw with a zero-backlash ball
screw and make mounts of the screw's nut on the carriage and verify all the
clearance.     This is the entire point of 3D model is as shown in the
above link.   I can verify the entire design before making a part.     I
can answer questions like "where do the glass slides go and how to route
the cables?"  I can add the slides to the model and move the parts to
verify clearances.

How to do that with OpenSCAD?   Can you even say things like "make this new
part to mate with that existing part" or must you make the new part from
scratch using measurements pulled from the existing part?

Motorizing the BS1 is EXACTLY this process, you start with a stock BS1 then
change out some parts, verify it all works then print and cut the parts.
You REALLY want the ability to test-fit and fix and have that take about a
minute at most.   openscad is such an unusual and specialized product I'd
hate to recommend it for general design work..  But it is good for making a
single standalone parameterized part.  Like a gear but not a motorcycle or
a milling machine.

On Fri, May 29, 2020 at 1:10 PM Lawrence Glaister <[email protected]> wrote:

> On 2020-05-29 12:09 p.m., Gene Heskett wrote:
>
>  >
>  > And I just heard a vehicle stop and when I got to the front door, there
>  > was a box with an amazon label on it, with two spools of pla and a bag
>  > of spare nozzles in it.  So its starting to trickle in. Surprise, each
>  > spool of pla includes a new hot plate cover.  Overture brand.  Do they
>  > all include that?
>  >
>  > Thanks.
>  >
>  > Cheers, Gene Heskett
>  >
>
> Hi Gene,
> I have been playing with a Creality cr-10 mini for a couple of years.
> When I first bought it, I wasn't sure what I would use it for, but I
> wanted to explore the technology. You are in for a fun ride but it takes
> patience and a little experimenting when things go wrong.
> Using linux, I use the following tools:
>           stl      gcode          usb serial
> OPENSCAD --> CURA --> REPETIERHOST --> 3D printer
> design       cam      stream gcode to machine
>
> openscad is like a little scripting language where you describe your
> part geometry.
> openscad exports stl files (triangular surface models)
> cura takes the stl file and converts it to gcode that moves the
> printhead around and controls the plastic extrusion nozzle.
> You can put the gcode file on an sd card and plug it into the printer or
> I use repetier host as a gui that draws pretty pictures as it streams
> the gcode to the printer. The gcode files are quite large as everything
> is repeated a lot as the approx 0.2mm layers of plastic are piled up.
>
> some of the little gadgets I have designed for my projects:
> https://www.thingiverse.com/ve7it/designs
>
> I also have used the overture filament... seems to do the trick!
> I dont use the hot plate cover.. I used to print on the glass bed, but
> recently I have been using 2" wide blue painters tape on the bed as it
> does tend to grip the objects well and can be replaced if it gets
> damaged when prying off a part. It leaves a nice texture on the bottom
> of the part.
>
> The biggest challenge in getting a print to work is getting the first
> layer printed and stuck to the base material. Mostly this involves
> getting the bed height adjusted properly so the first layer sticks
> evenly. (bed leveling and height adjustment). There are lots of software
> adjustments in cura, but if you select a PLA profile, the defaults will
> be close to getting you a good print.... youtube is quite helpful if you
> run into issues.
>
> Have fun
>
> cheers
> Lawrence
> Nanoose Bay BC, Canada
>
>
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>


-- 

Chris Albertson
Redondo Beach, California

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