Software – Page 5 – The Smell of Molten Projects in the Morning

CNC-3018XL: Reversing the Axes

The CNC-3018XL fit into its new home with the Run/Hold buttons toward the front:

3018CNC - new orientation — 3018CNC – new orientation

Which is rotated 180° from its previous orientation, putting Quadrant I and the most-positive coordinates in the left-front corner. Rather than stand on my head while trying to use the jog keypad upside-down, I reversed the axis directions by changing the GRBL Direction port invert mask value from its previous 4:

$3=7

Because the home switch positions haven’t changed, reverse the Homing dir invert mask from 0:

$23=3

The XY origin remains in the center of the platform, so the G54 XY offset didn’t change. The Z offset puts the Pilot pen tip 10 mm above the platform, which will change as you (well, I) touch it off on the paper:

G10 L2 P1 X-169.0 Y-149.5 Z-44.0

Jog to the left rear corner (with Z at the home position) and set the G28 park position:

G28.1

Jog to the right front corner (also Z homed) where (manual) tool changes take place:

G30.1

Configure bCNC for manual tool changes without probing at the G30 position:

The machine will move to the tool change position at each Tn M6, the operator (that would be me) inserts ~~tool~~ pen n as needed, pokes the Run button, and watches it draw pretty pictures in a resolutely techie manner:

3018CNC - Spirograph test pattern — 3018CNC – Spirograph test pattern

For completeness, the current GRBL settings:

$$
$0=10
$1=100
$2=0
$3=7
$4=0
$5=0
$6=0
$10=1
$11=0.010
$12=0.020
$13=0
$20=1
$21=0
$22=1
$23=3
$24=100.000
$25=2000.000
$26=25
$27=1.250
$30=1000
$31=0
$32=0
$100=401.284
$101=400.000
$102=400.000
$110=3000.000
$111=3000.000
$112=3000.000
$120=1000.000
$121=1000.000
$122=1000.000
$130=338.000
$131=299.000
$132=44.000
$#
[G54:-169.000,-149.500,-34.450]
[G55:0.000,0.000,0.000]
[G56:0.000,0.000,0.000]
[G57:0.000,0.000,0.000]
[G58:0.000,0.000,0.000]
[G59:0.000,0.000,0.000]
[G28:-335.000,-3.310,-3.450]
[G30:-1.000,-297.000,-1.000]
[G92:0.000,0.000,0.000]
[TLO:0.000]
[PRB:0.000,0.000,0.000:0]

The weird $100 X axis step/mm value is correct, because QC escapes are a thing.

2025-07-18

CNC-3018XL Setup: Table Riser Blocks

After fixing the X axis drive, the CNC-3018XL table moved properly again, so I measured its overall alignment:

3018CNC - table height measurement — 3018CNC – table height measurement

The +Y side (on the left in the photo, keeping in mind I’ve rotated the axes) turned out to be 0.7 mm too low, so I made a set of riser blocks to level the tabletop:

Table Riser - solid model — Table Riser – solid model

The 10 mm height would ram the tip of a Pilot pen about 10 mm below the tabletop surface, were it not for the spring-loaded pen holder:

Pilot V5RT holder - installed — Pilot V5RT holder – installed

The 0.7 mm difference in height levels the tabletop:

CNC3018XL - table riser positions — CNC3018XL – table riser positions

The OpenSCAD code produces an SVG outline I intended to use for a foam pad, but then I found a quartet of springs that worked even better:

CNC3018XL - table spring mount — CNC3018XL – table spring mount

So it’s now aligned within ±0.3-ish mm across the surface, with the unflatness of a slab cut from a 1955-era Formica kitchen countertop accounting for most of the difference in a swale from Quadrant III across the origin to Quadrant I.

Which a check plot using an old file shows will be Flat Enough for my simple needs:

CNC3018XL - test plot — CNC3018XL – test plot

Having the camera alignment remain exactly spot on came as a pleasant surprise:

The faded cross to the left came from the table’s previous position; there’s no positive index between the countertop slab and the underlying T-slots.

Part of the motivation for these blocks was to verify PrusaSlicer automagically handles filament / color changes between two objects, as long as OpenSCAD hasn’t unioned them as part of a common transformation. Not having to cut out the socket around the text simplifies the code from what I’d been doing with previous objects.

The OpenSCAD source code as a GitHub Gist:

	// CNC 3018 table riser blocks
	// Ed Nisley – KE4ZNU
	// 2025-06-29

	include <BOSL2/std.scad>

	Layout = "Show"; // [Show,Build,Outlines]

	/* [Hidden] */

	HoleWindage = 0.2;
	Protrusion = 0.1;

	BlockOA = [40.0,30.0,10.0]; // riser block size

	SlotBlock = [8.0,BlockOA.y,3.0]; // alignment in slot

	BoltOD = 6.0 + HoleWindage; // central bolt

	LogoFont = "Fira Sans Condensed:style=SemiBold";
	LogoSize = 7.5;
	LogoColor = "Red";
	LogoThick = 0.4;

	//———-
	// Define Shapes

	module Riser(thick=1,matl="Block") {

	LogoText = format_fixed(thick,1);

	if (matl == "Text" \|\| matl == "All")
	right(BlockOA.x/4) zrot(90)
	color(LogoColor)
	up(thick + SlotBlock.z + ((matl == "All") ? 0.01 : 0))
	text3d(LogoText,LogoThick + ((matl == "All") ? 0.01 : 0),LogoSize,LogoFont,
	anchor=TOP,atype="ycenter");

	if (matl == "Block" \|\| matl == "All")
	difference() {
	cuboid(SlotBlock,$fn=8*3,anchor=BOTTOM,rounding=2.0,except=[BOTTOM,TOP]) position(TOP)
	cuboid(BlockOA,$fn=8*3,anchor=BOTTOM,rounding=2.0,except=[BOTTOM,TOP]);
	down(Protrusion)
	zrot(180/6)
	cyl(2*BlockOA.z,d=BoltOD,$fn=6,anchor=BOTTOM,circum=true);
	}

	}




	//———-
	// Build things

	if (Layout == "Show")
	down(SlotBlock.z)
	Riser(BlockOA.z,matl="All");

	if (Layout == "Outlines") {
	projection(cut=false)
	Riser(BlockOA.z,matl="Block");
	}

	if (Layout == "Build") {
	up(BlockOA.z + SlotBlock.z) xrot(180)
	Riser(BlockOA.z,matl="Block");
	up(BlockOA.z + SlotBlock.z) xrot(180)
	Riser(BlockOA.z,matl="Text");

	}

view raw 3018XL Table Risers.scad hosted with ❤ by GitHub

2025-07-09

GIMP 3.0 vs. XSane vs. gimp-xsanecli

For reasons I do not profess to understand, GIMP 3.0 does not work with plugins written for GIMP 2.0, including the XSane plugin that handles scanning. This seems like an obvious oversight, but after three months it also seems to be one of those things that’s like that and that’s the way it is.

Protracted searching turned up gimp-xsanecli, a GIMP 3.0 plugin invoking XSane through its command-line interface to scan an image into a temporary file, then stuff the file into GIMP. Unfortunately, it didn’t work over the network with the Epson ET-3830 printer / scanner in the basement.

It turns out gimp-xsanecli tells XSane to output the filename it’s using, then expects to find the identifying XSANE_IMAGE_FILENAME string followed by the filename on the first line of whatever it gets back:

if result != 'XSANE_IMAGE_FILENAME: ' + png_out:
  Gimp.message('Unexpected XSane result: ' + result)
  return Gimp.ValueArray.new_from_values([GObject.Value(Gimp.PDBStatusType, Gimp.PDBStatusType.EXECUTION_ERROR)])

The font ligature that may or may not mash != into ≠ is not under my control.

Protracted poking showed the scanner fires a glob of HTML through proc/stdout into gimp-xsanecli before XSane produces its output, but after the scan completes:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN "
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
… snippage …
</head>
<body><noscript>Enable your browser's JavaScript setting.</noscript></body></HTML>XSANE_IMAGE_FILENAME: /tmp/out.png

Complicating the process:

The HTML glob only appears on the first scan, after which XSane produces exactly what gimp-xsanecli expects
There is no newline separating the glob from the expected output on the last line

So …

Insert a while loop into the main loop to strip off the HTML glob line by line by line:

        while True:
                # Wait until XSane prints the name of the scanned file, indicating scanning is finished
                # This blocks Python but that is ok because GIMP UI is not affected

                # discard HTML header added by scanner to first scan
                while True :

                        result = proc.stdout.readline().strip()

                        if r'</body>' in result :
                                result = result.partition(r'</HTML>')[-1]
                        #        Gimp.message('Found end of HTML: ' + result)
                                break

                        elif 'XSANE_IMAGE_FILENAME:' in result :
                        #        Gimp.message('Found filename: ' + result)
                                break

                        else :
                        #        Gimp.message('Discarding: ' + result)
                                continue

                if result == '':
                        # XSane was closed
                        break

                if result != 'XSANE_IMAGE_FILENAME: ' + png_out:
                        Gimp.message('Unexpected XSane result: ' + result)
                        return Gimp.ValueArray.new_from_values([GObject.Value(Gimp.PDBStatusType, Gimp.PDBStatusType.EXECUTION_ERROR)])

                # Open image
                image = Gimp.file_load(Gimp.RunMode.NONINTERACTIVE, Gio.File.new_for_path(png_out))
                Gimp.Display.new(image)

                # Remove temporary files
                os.unlink(png_out)

                if not SCAN_MULTIPLE:
                        proc.terminate()
                        break

        os.rmdir(tempdir)

        return Gimp.ValueArray.new_from_values([GObject.Value(Gimp.PDBStatusType, Gimp.PDBStatusType.SUCCESS), GObject.Value(Gimp.Image.__gtype__, image)])

While it’s tempting to absorb the whole thing in one gulp with proc.stdout.read().strip(), that doesn’t work because nothing arrives until the XSane subprocess terminates, which is not what you want.

A scan to show It Just Works™ :

I expect it doesn’t work under a variety of common conditions, but … so far so good.

2025-06-27

HQ Sixteen: Nose Ring Lights Power Supply

With the quilt off the HQ Sixteen, I could install the 24 V power supply for the Nose Ring Lights:

IMO, black nylon screws look spiffier than brass.

The solid model shows the covers have a 2 mm overlap with the power supply case to keep them lined up:

HQ Sixteen Nose Ring Lights - power supply cover - solid model — HQ Sixteen Nose Ring Lights – power supply cover – solid model

I managed to reuse three of the five holes from the previous 12 V power supply and drill only three more:

HQ Sixteen Nose Ring Lights - power supply detail — HQ Sixteen Nose Ring Lights – power supply detail

The tops of the power supply ears aren’t quite flat, giving the standoffs a slight tilt that the covers mostly drag back into alignment.

The M4 brass standoffs screw into holes tapped in the thick plastic, thus eliminating nuts inside the power pod:

HQ Sixteen Nose Ring Lights - power supply wiring — HQ Sixteen Nose Ring Lights – power supply wiring

The yellow silicone tape wraps two pairs of Wago connectors that dramatically simplify electrical connections in anything with enough space for their chonky bodies.

In the unlikely event you need such things, the original post links the OpenSCAD source code.

With the power supply in place, I think I can put some LED strips under the arm of the machine to light up more of the quilt than the nose lights can reach. More pondering is in order.

2025-06-13

WS-5000 Anemometer Bird Spike Ring

A critter made off with our battered plastic rain gauge, so I set up an Ambient Weather WS-5000 station to tell Mary how much rain her garden was getting. I added the Official Bird Spike Ring around the rain gauge to keep birds off, but robins began perching atop the anemometer while surveying the yard and crapping on the insolation photocell.

After a few false starts, the anemometer now has its own spikes:

It’s a snugly fitting TPU ring:

Weather Station Spikes - build test piece — Weather Station Spikes – build test piece

The spikes are Chromel A themocouple wire, because a spool of the stuff didn’t scamper out of the way when I opened the Big Box o’ Specialty Wire. As you can tell from the picture, it’s very stiff (which is good for spikes) and hard to straighten (which is bad for looking cool).

The shape in the middle is a hole diameter test piece. Next time around, I’ll use thicker 14 AWG copper wire:

Weather station spikes - test piece — Weather station spikes – test piece

The test piece showed I lack good control over the TPU extrusion parameters on the Makergear M2, as holes smaller than about 2 mm vanish, even though the block’s outside dimensions are spot on. This application wasn’t too critical, so I sharpened the wire ends and stabbed them into the middle of the perimeter threads encircling the hole.

Now we’ll discover how TPU survives weather.

The OpenSCAD source code as a GitHub Gist:

	// Ambient Weather – Ambient Weather WS-5000 anemometer bird spike ring
	// Ed Nisley – KE4ZNU
	// 2025-06-09

	include <BOSL2/std.scad>

	Layout = "Show"; // [Show,Build,Slice]

	/* [Hidden] */

	HoleWindage = 0.2;
	Protrusion = 0.1;

	ID = 0;
	OD = 1;
	LENGTH = 2;

	SpikeOC = 30.0; // straight-line distance between spikes, OEM = 35

	WallThick = 4.0;

	BandID = 3.5*INCH – 0.5; // = OD of weather station
	BandOD = BandID + 2*WallThick;

	BandHeight = 8.0;

	SpikeOD = 1.7 + HoleWindage; // wire diameter
	SpikeWall = 2.0; // around wires

	SpikeBCD = BandOD;

	MountOD = SpikeOD + 2*SpikeWall;

	NumSpikes = ceil(PI*BandOD/SpikeOC); // need integral number of spikes
	SpikeAngle = 360/NumSpikes;
	NumSides = 3*NumSpikes;

	echo(SpikeAngle=SpikeAngle);
	echo(NumSpikes=NumSpikes);


	//———-
	// Define Shapes

	module Slice() {

	difference() {
	hull() {
	pie_slice(h=BandHeight,d=BandOD,$fn=NumSides,ang=SpikeAngle,spin=-SpikeAngle/2,anchor=BOTTOM);
	right(SpikeBCD/2 – MountOD/2)
	cyl(h=BandHeight,d=MountOD,realign=true,anchor=LEFT+BOTTOM,$fn=2*6);
	}
	down(Protrusion) {
	cyl(h=BandHeight + 2*Protrusion,d=BandID,$fn=NumSides,circum=true,realign=true,anchor=BOTTOM);
	right(SpikeBCD/2)
	cyl(h=BandHeight + 2*Protrusion,d=SpikeOD,$fn=6,circum=true,realign=true,anchor=BOTTOM);
	}
	}

	}

	module SpikeRing() {

	for (i=[0:NumSpikes-1])
	zrot(i*SpikeAngle)
	Slice();


	}

	//———-
	// Build things

	if (Layout == "Slice") {
	Slice();
	}


	if (Layout == "Show") {
	left(SpikeBCD/2)
	Slice();
	SpikeRing();
	}

	if (Layout == "Build") {
	SpikeRing();
	}

view raw Weather Station Spikes.scad hosted with ❤ by GitHub

2025-06-12

HQ Sixteen: Nose Ring Lights

We don’t know what the proper term might be for this part of the machine, but it looks sorta like a nose and the lights form most of a ring around it, so I’m going with “Nose Ring Lights”:

The general idea is to put more light on the quilt than the Chin Light, which looked pretty good until the COB LED strip started flickering as the LEDs failed.

Handi-Quilter sells a ring light for machines manufactured a decade later than ours, but it uses a built-in USB jack this machine lacks.

One of two (apparently) unused M4 holes on the left side of the machine frame suggested a mounting point for a 3D printed bracket:

HQ Sixteen Nose Ring Lights - solid model — HQ Sixteen Nose Ring Lights – solid model

The ramp matches the 3° (-ish) mold draft of the machine frame, which I initially ignored by angling the tab, but a tilted frame looked awful; it’s now aligned with local horizontal..

A few iterations got all the pieces & holes in their proper places:

HQ Sixteen Nose Ring lights - iterations — HQ Sixteen Nose Ring lights – iterations

The smaller (rampless) bracket has three LED strips, but a quick test showed more light would be better:

HQ Sixteen Nose Ring lights - bottom view — HQ Sixteen Nose Ring lights – bottom view

The lack of a transparent-ish cover is obviously unsuitable for a commercial product, but the key design goal is to not interfere with spreading as much light as possible across as much of the quilt as possible. The black JB Weld Plastic Bonder blobs keep the 24 VDC supply out of harm’s way, which is as good as it needs to be for now.

The bracket has three sides, because the right side of the machine has all the thread guide hardware. Putting anything over there seemed likely to interfere with either thread movement or fingers making adjustments.

Fortunately, the wider bracket doesn’t stick out too far beyond the machine frame and the doubled LED strips create a much smoother light pool:

HQ Sixteen Nose Ring lights - left front view — HQ Sixteen Nose Ring lights – left front view

Yes, the quilt is focused and the LED frame is blurred.

The larger light-emitting area reduces the shadow under the left rod (supporting the ruler foot) enough to be unobjectionable.

A 0.2 mm layer thickness transforms the smooth ramp into stair steps:

HQ Sixteen Nose Ring Lights - PrusaSlicer — HQ Sixteen Nose Ring Lights – PrusaSlicer

They’re inconspicuous after the bracket is installed.

The Chin Light ran on 12 V and these strips require 24 V, so the OpenSCAD code creates a pair of endcaps for the new supply, which is of course completely different than the old supply. Setting that up must await quilt completion.

The OpenSCAD source code as a GitHub Gist:

	// HQ Sixteen Nose Ring Lights
	// Ed Nisley – KE4ZNU
	// 2025-05-23

	include <BOSL2/std.scad>

	Layout = "Show"; // [Show,Build,NosePlan,PowerCap]

	// Number of side-by-side LED strips
	Strips = 2;

	/* [Hidden] */

	HoleWindage = 0.2;
	Protrusion = 0.1;
	NumSides = 334;

	$fn=NumSides;

	ID = 0;
	OD = 1;
	LENGTH = 2;

	Gap = 5.0;

	WallThick = 5.0; // default thickness for things

	NoseRadius = 6.0; // corner roundoff

	NoseOA = [44.0,36.5]; // overall nose size
	NoseAngles = [87,87]; // front & rear inward angles wrt left side

	NoseCenters = [ // centers of circles defining the nose corners
	[NoseRadius, NoseOA.y/2 – NoseRadius],
	[NoseRadius,-(NoseOA.y/2 – NoseRadius)],
	[NoseOA.x – NoseRadius, NoseOA.y/2 – NoseRadius – (NoseOA.x – 2NoseRadius)tan(90 – NoseAngles[0])],
	[NoseOA.x – NoseRadius,-(NoseOA.y/2 – NoseRadius – (NoseOA.x – 2NoseRadius)tan(90 – NoseAngles[1]))],
	];

	LEDMargin = 1.0;
	LEDStrip = [41.5 + LEDMargin,8.0 + LEDMargin,1.8 + 0.2]; // 24 V COB LED strip unit + windage
	LEDBaseOA = [LEDStrip.x + StripsLEDStrip.y,NoseOA.y + 2Strips*LEDStrip.y,WallThick]; // LED mount

	DraftAngle = 3.0; // angle of frame wrt horizontal at right end of nose
	DraftWedge = [NoseOA.x,NoseOA.y + 2LEDStrip.y,NoseOA.xtan(DraftAngle)];

	HoleOffset = [-10.0,5.5,DraftWedge.z + 10.0]; // from left front corner of nose
	HolePosition = HoleOffset + [0,-NoseOA.y/2,WallThick]; // absolute coordinates from origin

	Screw = [4.0 + HoleWindage,9.0,2.0]; // LENGTH=button head

	Bracket = [WallThick,Screw[OD] + 4.0,HoleOffset.z + Screw[OD/2] + 2.0 + WallThick];

	Supply = [46.0,30.0,21.0]; // 24 VDC power supply
	SupplyScrewOffset = 5.0; // … M4 screw hole from end of supply case

	CapWall = 3.0;
	CapRadius = CapWall – 1.0;
	CapInset = 1.0;
	CapOA = [20.0,Supply.y + 2*CapWall,Supply.z + CapWall]; // x & y to cover existing holes

	//———-
	// Define Shapes

	//—– 2D outline of nose piece just under frame casting

	module NosePlan() {
	hull()
	for (p = NoseCenters)
	translate(p) circle(r=NoseRadius);
	}

	//—– LED mounting plate

	module Mount() {

	union() {
	difference() {
	union() {
	right(LEDBaseOA.x/2 – Strips*LEDStrip.y)
	cuboid(LEDBaseOA,rounding=WallThick/2,except=BOTTOM,anchor=BOTTOM);
	up(LEDBaseOA.z) left(-HoleOffset.x/2)
	yrot(DraftAngle)
	cuboid(DraftWedge,rounding=WallThick/2,edges="Z",anchor=LEFT+BOTTOM);
	}
	down(Protrusion)
	linear_extrude(LEDBaseOA.z + DraftWedge.z + Protrusion)
	NosePlan();
	if (Strips > 1)
	translate([HolePosition.x – Bracket.x/2,HolePosition.y – Bracket.y,-Protrusion])
	cyl(LEDBaseOA.z + 2*Protrusion,d=4.0,anchor=BOTTOM);
	}
	difference() {
	union() {
	translate([HolePosition.x,HolePosition.y,(Bracket.x/2)*sin(DraftAngle)])
	left(Bracket.x)
	cuboid(Bracket,rounding=WallThick/2,edges=LEFT,anchor=BOTTOM+LEFT);
	translate([HolePosition.x – Bracket.x/2,HolePosition.y,0]) // rounding filler
	cuboid([LEDStrip.y,Bracket.y,WallThick],anchor=BOTTOM+LEFT);
	}
	translate(HolePosition)
	xrot(180/6) xcyl(l=NoseOA.x,d=Screw[ID],$fn=6);
	}
	}
	}

	//—– Endcap for power supply

	module EndCap() {

	difference() {
	cuboid(CapOA,rounding=CapRadius,except=BOTTOM,anchor=LEFT+BOTTOM);
	right(CapOA.x – CapWall) down(Protrusion)
	cuboid(Supply + [0,0,Protrusion],anchor=RIGHT+BOTTOM);
	right(CapInset + SupplyScrewOffset)
	zcyl(l=2*CapOA.z,d=Screw[ID],$fn=6,anchor=BOTTOM);
	}

	}


	//———-
	// Build things

	if (Layout == "NosePlan") {
	NosePlan();
	}

	if (Layout == "PowerCap") {
	EndCap();
	}

	if (Layout == "Show") {
	Mount();

	ctr = 80;
	ofs = Supply.x/2 – CapInset;
	left(ctr – ofs)
	EndCap();
	left(ctr + ofs)
	xflip()
	EndCap();
	color("Silver",0.6)
	left (ctr)
	cuboid(Supply,anchor=BOTTOM);
	}

	if (Layout == "Build") {
	Mount();
	back((LEDBaseOA.y + CapOA.y)/2 + Gap) right(Gap) up(CapOA.z) zflip()
	EndCap();
	back((LEDBaseOA.y + CapOA.y)/2 + Gap) left(Gap) zrot(180) up(CapOA.z) zflip()
	EndCap();
	}

view raw HQ Sixteen Nose Ring Lights.scad hosted with ❤ by GitHub

2025-05-30

3D Printer Filament Spool Washers

The auto-rewind spindles for PolyDryer boxes fit a variety of spools, but recessed hubs like this require a pair of washers to center the spindles:

Filament spool washers - recessed hub — Filament spool washers – recessed hub

They’re laser-cut, although you could print them easily enough:

Filament spool washers - recessed hub - installed — Filament spool washers – recessed hub – installed

The size for that particular spool:

OD = 80 mm
Flange side ID = 51 mm
Nut side ID = 43
Thickness = ¼ inch, near enough

Other spools required a 3 mm shim on the flange side to sit centered in the PolyDryer boxes. Those are basically identical what you see above, with a 72 mm OD matching the flange.

The PETG-CF filament arrived on cardboard spools, which are apparently the new hotness:

Filament spool washers - printed — Filament spool washers – printed

The 56 mm spool ID requires adapters on both sides, with the flange side getting a 4 mm shim:

Filament spool washers - printed shim - flange side — Filament spool washers – printed shim – flange side

That skootches the spool over against the 1 mm shim on the nut side:

Filament spool washers - printed - nut side — Filament spool washers – printed – nut side

It would be possible to modify the auto-rewind spindle diameters to suit, if you were a dab hand with Fusion360, but the variety of hubs around here tells me a set of cheap adapters & shims makes more sense.

You should not assume anything will fit the spools you have, no matter how much they resemble what you see above.

The OpenSCAD source code as a GitHub Gist:

	// Polymaker PolyDryer auto-rewind spool washers
	// Ed Nisley – KE4ZNU
	// 2025-05-20

	include <BOSL2/std.scad>

	Layout = "Show"; // [Show,Build]


	/* [Hidden] */

	HoleWindage = 0.2;
	Protrusion = 0.1;
	NumSides = 334;

	$fn=NumSides;

	ID = 0;
	OD = 1;
	LENGTH = 2;

	Gap = 5.0; // Build separation
	SpoolWidth = 20.0; // Show separation

	FlangeOD = 72.0; // auto-rewind spindle
	FlangeHubOD = 50.5 + 1.0;
	NutOD = 77.0;
	NutHubOD = 42.0 + 1.0;


	//———-
	// Define Shapes

	module EryOneCF(Side = "Flange") {

	SpoolID = 56.0 – 1.0;
	SpoolSideThick = 3.0;

	if (Side == "Flange")
	tube(4.0,od=FlangeOD,id=FlangeHubOD,anchor=BOTTOM) // flange side
	position(TOP)
	tube(SpoolSideThick,od=SpoolID,id=FlangeHubOD,anchor=BOTTOM);

	if (Side == "Nut")
	tube(1.0,od=NutOD,id=43.0,anchor=BOTTOM) // nut side
	position(TOP)
	tube(SpoolSideThick,od=SpoolID,id=NutHubOD,anchor=BOTTOM);

	}



	//———-
	// Build things

	if (Layout == "Show") {
	left(SpoolWidth/2) yrot(90) EryOneCF("Flange");
	right(SpoolWidth/2) yrot(-90) EryOneCF("Nut");
	}

	if (Layout == "Build") {
	left((FlangeOD + Gap)/2) EryOneCF("Flange");
	right((NutOD + Gap)/2) EryOneCF("Nut");
	}

view raw PolyDryer spool washers.scad hosted with ❤ by GitHub

2025-05-21

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