Sunon MF40200V1-1000U-G99 · 5 V tachometer fan

"""Independently authored nominal mechanical model from Sunon drawing p6.
Rotor blades, struts and wire routing are illustrative; not exact vendor geometry.
Uses existing CadQuery installation, no new local CAD software installed.
"""
from pathlib import Path
import cadquery as cq,json,math
r=Path(__file__).resolve().parents[1]
a=cq.Assembly(name='MF40200V1_1000U_G99_nominal_illustration')
frame=cq.Workplane('XY').rect(40,40).extrude(20).edges('|Z').fillet(2)
frame=frame.cut(cq.Workplane('XY').circle(18.5).extrude(20))
for x in [-16,16]:
 for y in [-16,16]:frame=frame.cut(cq.Workplane('XY').center(x,y).circle(2.15).extrude(20))
a.add(frame,name='frame_nominal_40x40x20',color=cq.Color(.24,.26,.28))
a.add(cq.Workplane('XY').circle(9).extrude(12).translate((0,0,4)),name='motor_hub_illustrative',color=cq.Color(.32,.34,.36))
for i in range(7):
 blade=cq.Workplane('XY').polyline([(8,-2),(17,-4),(18,0),(10,4)]).close().extrude(1.2).translate((0,0,10)).rotate((0,0,0),(0,0,1),i*360/7)
 a.add(blade,name=f'illustrative_blade_{i+1}',color=cq.Color(.38,.40,.42))
for i in range(3):
 spoke=cq.Workplane('XY').box(18,2,2).translate((9,0,1)).rotate((0,0,0),(0,0,1),i*120)
 a.add(spoke,name=f'illustrative_support_{i+1}',color=cq.Color(.24,.26,.28))
# Deliberately no 305mm cable geometry: routing is installation-dependent.
a.export(str(r/'cad/MF40200V1-1000U-G99-ai-nominal.step'))
fp=['(footprint "Sunon_MF4020_Mechanical" (version 20241229) (generator "adom") (layer "F.Cu")',
'(descr "Fan mounting template only; no PCB electrical terminals; dimensions from Sunon D04114960G-01 p6")',
'(attr board_only exclude_from_pos_files exclude_from_bom)',
'(fp_text reference "FAN**" (at 0 -23) (layer "F.SilkS") (effects (font (size 1 1) (thickness 0.15))))',
'(fp_text value "MF40200V1-1000U-G99" (at 0 23) (layer "F.Fab") (effects (font (size 1 1) (thickness 0.15))))',
'(fp_rect (start -20 -20) (end 20 20) (stroke (width 0.15) (type default)) (fill none) (layer "F.Fab"))',
'(fp_rect (start -20.75 -20.75) (end 20.75 20.75) (stroke (width 0.05) (type default)) (fill none) (layer "F.CrtYd"))']
for x in [-16,16]:
 for y in [-16,16]:fp.append(f'(pad "" np_thru_hole circle (at {x} {y}) (size 4.3 4.3) (drill 4.3) (layers "*.Cu" "*.Mask"))')
fp+=['(model "${KIPRJMOD}/cad/MF40200V1-1000U-G99-ai-nominal.step" (offset (xyz 0 0 0)) (scale (xyz 1 1 1)) (rotate (xyz 0 0 0)))',')']
(r/'cad/Sunon_MF4020_Mechanical.kicad_mod').write_text('\n'.join(fp)+'\n')
obj={'symbolName':'MF40200V1-1000U-G99','mpn':'MF40200V1-1000U-G99','manufacturer':'Sunon','referencePrefix':'M','description':'5V 40x40x20mm fan with open-collector tach; lead numbers are library convention','datasheetUrl':'https://www.mouser.com/datasheet/3/1161/1/MF40200V1_1000U_G99_D04114960G_01_1.pdf','wikiUrl':'https://wiki.adom.inc/adom/mf40200v1-1000u-g99','distributors':{'mouser':'369-MF40200V1100UG99'},'pins':[{'number':'1','name':'RED_5V','type':'power_in','side':'left','group':'Power'},{'number':'2','name':'BLACK_GND','type':'power_in','side':'left','group':'Power'},{'number':'3','name':'YELLOW_FG','type':'open_collector','side':'right','group':'Tach'}],'preferences':{'pinLayout':'left-right','chipOutline':False}}
(r/'cad/symbol-input.json').write_text(json.dumps(obj,indent=2))
print('Created nominal model, mechanical footprint and symbol input; rotor details illustrative')