github.com/rdolbeau.SBusFPGA
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improve backplate

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This commit is contained in:
Romain Dolbeau
2022-01-29 10:49:35 +01:00
parent 3e7bd4c8ab
commit 8f017f5b92
1 changed files with 29 additions and 17 deletions
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46
sbus-to-ztex/Backplate.scad
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@@ -1,5 +1,7 @@
add_fan = 0; // not really compatible with USB...
add_vga = 1;
add_fan = 1; // not really compatible with USB...
add_vga = 0;
add_usb = 1;
usb_angled = 1;
SBUS_WIDTH = 83.82;
SBUS_LENGTH = 146.7;
@@ -45,6 +47,7 @@ SMALL_STRUT_WIDTH = 2;
SMALL_STRUT_LENGTH = 20;
USB_PLUG_OFFSET = (add_vga!=0 ? 65 : 30);
USB_PLUG_IDX = (add_vga!=0 ? 3 : -4);
fan_depth=8;
fan_height=25;
@@ -52,9 +55,8 @@ fan_width=fan_height;
fan_carrier_depth=5;
fan_extra_height=3;
vertical_offset=fan_height/2-SBUS_THICKNESS/2-(SBUS_BACKPLATE_PROTUSION_HEIGHT + SBUS_BACKPLATE_BOTTOM_TO_BOARD_BOTTOM)+fan_extra_height/2;
carrier_offset_from_backplate=8;
carrier_offset_from_backplate=5;
carrier_offset=-MY_FULL_LENGTH/2+fan_width/2+carrier_offset_from_backplate; // negative -> toward back
echo(carrier_offset);
module
primary ()
@@ -98,6 +100,7 @@ difference() { // B
-SBUS_THICKNESS/2-SBUS_BACKPLATE_BOTTOM_TO_BOARD_BOTTOM+7.08]) rotate([90,0,0]) color ("black") cylinder (h = FIX_HOLES_STUB_LENGTH, r1 = 2, r2 = 2, center = true);
/* USB plug (StarTech cable) */
if (add_usb) {
union() {
color ("grey")
translate ([-SBUS_WIDTH/2+USB_PLUG_OFFSET,
@@ -105,6 +108,7 @@ difference() { // B
14.8/2-SBUS_THICKNESS/2-SBUS_BACKPLATE_BOTTOM_TO_BOARD_BOTTOM-SBUS_BACKPLATE_PROTUSION_HEIGHT + 3.12])
cube ([16.5+4, 12, 9.5+4 /* 14.8 max */], center = true);
}
}
if (0) for (i =[-2: 1:2]) {
translate ([i * 15 + 2.5, 0, STRUT_HEIGHT / 2 - 0.1]) color ("red") cube ([STRUT_WIDTH, MY_FULL_LENGTH, STRUT_HEIGHT], center = true);
@@ -112,7 +116,7 @@ difference() { // B
} // union C
union() { // Z
if (add_usb && usb_angled) {
translate ([SBUS_WIDTH / 2 - USBCABLE_HOLLOWOUT_WIDTH / 2 + 5+ USBCABLE_HOLLOWOUT_OFFSETX,
MY_FULL_LENGTH / 2 + USBCABLE_HOLLOWOUT_LENGTH / 2 + USBCABLE_HOLLOWOUT_OFFSETY,
0]) {
@@ -125,7 +129,7 @@ difference() { // B
color ("yellow")
cube ([USBCABLE_HOLLOWOUT2_WIDTH, USBCABLE_HOLLOWOUT2_LENGTH, 50], center = true);
}
}
/* to fix the board to the machine */
translate ([-SBUS_WIDTH/2+(SBUS_WIDTH-SBUS_BACKPLATE_HOLESTOHOLES)/2,
@@ -136,6 +140,7 @@ difference() { // B
-SBUS_THICKNESS/2-SBUS_BACKPLATE_BOTTOM_TO_BOARD_BOTTOM+7.08]) rotate([90,0,0]) color ("yellow") cylinder (h = 10, r1 = 1.5, r2 = 1.5, center = true);
/* USB plug (StarTech cable) */
if (add_usb) {
union() {
color ("yellow")
translate ([-SBUS_WIDTH/2+USB_PLUG_OFFSET,
@@ -143,6 +148,7 @@ difference() { // B
14.8/2-SBUS_THICKNESS/2-SBUS_BACKPLATE_BOTTOM_TO_BOARD_BOTTOM-SBUS_BACKPLATE_PROTUSION_HEIGHT + 3.12])
cube ([16, 20, 9.5], center = true);
}
}
} // union Z
@@ -234,12 +240,14 @@ difference() { // B
color ("yellow")
cube ([PMOD_HOLLOWOUT_WIDTH, PMOD_HOLLOWOUT_LENGTH, 50], center = true);
}
if (1) { // we always need to leave space for the USB chips, w/ or w/o cable
translate ([SBUS_WIDTH / 2 - USB_HOLLOWOUT_WIDTH / 2 + 5+ USB_HOLLOWOUT_OFFSETX,
MY_FULL_LENGTH / 2 + USB_HOLLOWOUT_LENGTH / 2 + USB_HOLLOWOUT_OFFSETY,
0]) {
color ("yellow")
cube ([USB_HOLLOWOUT_WIDTH, USB_HOLLOWOUT_LENGTH, 50], center = true);
}
}
translate ([SBUS_WIDTH / 2 - SDCARD_HOLLOWOUT_WIDTH / 2 + 5+ SDCARD_HOLLOWOUT_OFFSETX,
MY_FULL_LENGTH / 2 + SDCARD_HOLLOWOUT_LENGTH / 2 + SDCARD_HOLLOWOUT_OFFSETY,
0]) {
@@ -254,13 +262,14 @@ difference() { // B
}
/* USB */
if (add_usb) {
translate ([SBUS_WIDTH / 2 - USBCABLE_HOLLOWOUT_WIDTH / 2 + 5+ USBCABLE_HOLLOWOUT_OFFSETX,
MY_FULL_LENGTH / 2 + USBCABLE_HOLLOWOUT_LENGTH / 2 + USBCABLE_HOLLOWOUT_OFFSETY,
0]) {
color ("yellow")
cube ([USBCABLE_HOLLOWOUT_WIDTH, USBCABLE_HOLLOWOUT_LENGTH, 50], center = true);
}
}
} // union J
} // difference I
@@ -277,7 +286,7 @@ extra_holes ()
/* border line (fan & jtag sides) */
for (i =[-8: 16:8]) {
for (j =[-4: 1:8]) {
if ((i!=8) || (j < 1))
if ((i!=8) || (j < 1) || (add_usb == 0 && j < 5))
translate ([i * 5, j * 5, 0])
color ("pink") cylinder (h = 50, r1 = 1.5, r2 = 1.5, center = true);
}
@@ -287,17 +296,17 @@ extra_holes ()
for (i =[-6: 2:6]) {
for (j =[-4: 1:5]) {
if (((i<-4) || (i>0)) || (add_vga==0))
if (((i<=2) || i>=8) || (j>-3)) // USB plug
if (!((i>=5) && (j>=4))) // USB weakness
if (!add_usb || (i<=(USB_PLUG_IDX-1)) || (i>=(USB_PLUG_IDX+5)) || (j>-3)) // USB plug
if (!((i>=5) && ((j>=4))) || (!add_usb && j==4)) // USB weakness
translate ([i * 5, j * 5, 0])
color ("pink") cylinder (h = 50, r1 = EXTRA_RAD, r2 = EXTRA_RAD, center = true);
}
}
/* holes in extension */
for (i =[-7: 2:7]) {
for (j =[-4.5: 1:4.5]) {
for (j =[-3.5: 1:4.5]) {
if (((i<-5) || (i>1)) || (j>0 && j<4 ) || (add_vga==0))
if (((i<=2) || i>=7) || (j>-3)) // USB plug
if ((!add_usb || (i<=(USB_PLUG_IDX)) || i>=(USB_PLUG_IDX+4)) || (j>-3)) // USB plug
translate ([i * 5, j * 5, 0])
color ("pink") cylinder (h = 50, r1 = EXTRA_RAD, r2 = EXTRA_RAD, center = true);
}
@@ -436,8 +445,6 @@ module vga_carveout() {
}
screw_hole_r=1.55;
triangle_width=4;
triangle_height=12;
module
fan_25mm_support() {
union() {
@@ -447,13 +454,18 @@ fan_25mm_support() {
}
// support
/* extra -2 (translate) and -4 (size) for usb */
translate([(SBUS_WIDTH-fan_carrier_depth)/2-fan_depth+0.5,carrier_offset-2.4-2,0]) {
color("purple") cube([fan_carrier_depth+5, fan_width+fan_extra_height+8-4, SBUS_THICKNESS], center = true);
translate([(SBUS_WIDTH-fan_carrier_depth)/2-fan_depth+0.5,(fan_width+fan_extra_height+carrier_offset_from_backplate-4)/2-MY_FULL_LENGTH/2 + SBUS_BACKPLATE_THICKNESS/2,0]) {
color("purple") cube([fan_carrier_depth+5, fan_width+fan_extra_height+carrier_offset_from_backplate-4, SBUS_THICKNESS], center = true);
}
// strut between the backplate and the fan carrier
/* extra -2 (translate) and -4 (size) for usb */
translate ([(SBUS_WIDTH-fan_carrier_depth)/2-fan_depth, carrier_offset-1-2, (SBUS_BACKPLATE_FULLHEIGHT-5)/2-SBUS_THICKNESS/2-SBUS_BACKPLATE_BOTTOM_TO_BOARD_BOTTOM]) color ("purple") cube ([fan_carrier_depth/2, 38-4,SBUS_BACKPLATE_FULLHEIGHT-5 ], center = true);
echo(carrier_offset_from_backplate);
echo(carrier_offset);
strut_width=carrier_offset_from_backplate+0.001;
translate ([(SBUS_WIDTH-fan_carrier_depth)/2-fan_depth, strut_width/2-MY_FULL_LENGTH/2 + SBUS_BACKPLATE_THICKNESS/2, (SBUS_BACKPLATE_FULLHEIGHT-5)/2-SBUS_THICKNESS/2-SBUS_BACKPLATE_BOTTOM_TO_BOARD_BOTTOM]) color ("purple") cube ([fan_carrier_depth/2, strut_width,SBUS_BACKPLATE_FULLHEIGHT-5 ], center = true);
triangle_width=carrier_offset_from_backplate-3;
triangle_height=12;
translate ([(SBUS_WIDTH-fan_carrier_depth)/2-fan_depth, carrier_offset-(fan_width+fan_extra_height)/2-triangle_width/2, triangle_height/2-SBUS_THICKNESS/2-SBUS_BACKPLATE_BOTTOM_TO_BOARD_BOTTOM+SBUS_BACKPLATE_FULLHEIGHT-5]) rotate([0,90,0]) color("pink") translate([0,0,-fan_carrier_depth/4]) linear_extrude(height=fan_carrier_depth/2) polygon( points=[[triangle_height/2,-triangle_width/2],[-triangle_height/2,triangle_width/2],[triangle_height/2,triangle_width/2]] );
/* incompatible with usb */