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Micro Servo And Horn Sorting Caddy
A 137 x 70 x 18 mm drawer caddy for spare servos. It has ten 25 x 14 mm upright pockets, 16.4 mm deep, sized for 9 g micro servos (SG90 / MG90S class, body about 23 x 12.5 mm): each servo stands with its mounting tabs on the rim and its lead hanging over the edge. Along the front are three 43 x 32 mm scooped bins for loose horns, horn screws and spline adapters.
Stewart Top Payload Platform
This is the moving top plate of the 'MG90S Six-Servo Stewart Platform' kit. It is 130 mm across and 5 mm thick, with six M3 clearance holes on a 50 mm radius (pairs at 30°, 150° and 270°, ±12°). Each hole has a captive M3 hex-nut pocket, so the ball-stud tabs of the six pushrods bolt on from below with M3x16 screws. The centre has a 31 x 31 mm M3 payload grid with nut pockets. Three triangular windows save weight, and a 4 mm underside ring rib at 58 mm radius stiffens the plate. The rib is cut away wherever a stud tab sits. The plate prints top-face-down with the rib pointing up, so it needs no supports.
Slotted Servo Crank Arm
A 37 mm long, 4 mm thick flat crank for the 'MG90S Six-Servo Stewart Platform' kit (print ×6). It fits over a stock MG90S single-arm horn: the horn keys into a 6 mm wide, 1 mm deep recess on the underside and is fixed with two M2 self-tappers through a 2.4 mm radial slot. The slot runs from 6 to 16 mm radius, so the horn's hole spacing doesn't need to be known. A 7.5 mm centre hole clears the horn screw, and a 10 mm tip boss has an M3 clearance hole 24.0 mm from the shaft that takes the pushrod ball-stud tab with an M3x16 screw and a nylock nut.
MG90S Radial Servo Cradle
One of six MG90S servo cradles for the 'MG90S Six-Servo Stewart Platform' kit. It is an L-bracket with a 44 x 20 x 5 mm foot, and two counterbored M3 clearance holes 32 mm apart bolt it to the base plate's heat-set inserts with M3x10 screws. A 4 mm wall with a 23.3 x 12.7 mm window holds the MG90S so its shaft points radially outward, 22 mm above the base. The tab-screw slots take M2 self-tappers at tab spacings from 26 to 30 mm, and two gussets carry servo torque into the foot.
Stewart Hex Base Plate
The foundation of the MG90S Six-Servo Stewart Platform kit. It is a 170 mm round plate, 5 mm thick, with 12 M3 heat-set insert bores (4.0 mm) for six servo cradles in three pairs on a 62 mm radius. It also has three M3 clearance holes on a 78 mm radius for the electronics-deck legs, a 56 mm cable pass-through, and a notched 3 mm underside stiffening rim, and it weighs in at about 90 cm³. It prints top face down with the rim up, so it needs no supports.
Micro Servo Slot Mount Plate
A 64 x 22 x 5 mm slotted servo carrier used at all four axes of the 'MG90S Animatronic Desk Lamp Robot' kit. It takes an MG90S or SG90 servo through a 22.8 x 12.6 mm window, with M2 screws through the tabs on a 27.8 mm pitch. Two rounded 3.4 mm M3 slots allow ±3 mm of travel on the kit's 44 mm heat-set insert pitch, so you can line up the spline on the joint axis even when a clone servo's tabs are a little off.
Seven-LED Lamp Head
This is the tilting head of the 'MG90S Animatronic Desk Lamp Robot' kit. It has a 70 mm shade with a 3 mm face that takes seven 5 mm LEDs through 5.3 mm holes, one in the centre and six on a 16 mm radius. The 32 mm-wide R14 tilt tongue sits with its axis 50 mm above the face. The side-A pad takes the MG90S/SG90 horn. Side B has a 4.5 mm M4 hole, an M4 nut pocket (7.2 mm across flats) and a 7 mm boss that runs on the Upper Arm's 624 bearing (4 x 13 x 5 mm). The pivot is an M4x16 bolt.
Upper Arm Channel Link
This is the elbow-to-head link of the 'MG90S Animatronic Desk Lamp Robot' kit. It is a 131 x 47 x 28 mm U-channel, printed web-down, with its joint axes 95 mm apart. The elbow tongue is 32 mm wide and takes the MG90S/SG90 horn on one side. On the other side it takes an M4x16 bolt, a captive M4 nut and a 7 mm boss that runs on a 624 bearing (4 x 13 x 5 mm). The head clevis is 36 mm wide. It has two M3 heat-set bores (4.0 mm) at a 44 mm pitch for the slotted servo plate, and a 13.05 mm press-fit seat for a 624 bearing.
Lower Arm Channel Link
Shoulder-to-elbow link for the 'MG90S Animatronic Desk Lamp Robot' kit. It is a 146 x 47 x 28 mm U-channel printed web-down. The 32 mm tongue takes the shoulder servo horn on one side and an M4x16 bolt, M4 nut and 624 bearing on the other. At the top end, a 36 mm elbow clevis has two M3 heat-set bores for the slotted MG90S/SG90 plate and a 13.05 mm press-fit seat for a 624 bearing (4 x 13 x 5 mm).
Turntable Shoulder Clevis
Yaw turntable for the 'MG90S Animatronic Desk Lamp Robot' kit. It is a 118 mm disc that rides on the Weighted Yaw Base Tub's thrust rim at r=54–60, centred by a 53.5 mm skirt. A 32 mm solid horn pad with a 7 mm screw-access hole takes the MG90S/SG90 yaw servo horn. The shoulder clevis sits 36 mm above the deck, with 36 mm between the cheeks. The servo cheek has M3 heat-set bores at a 44 mm pitch and a 34 × 16 mm body window for the slotted servo plate. The bearing cheek has a press-fit 624 seat, 13.05 × 5 mm, behind a 10 mm lip. The disc also has two 20 × 8 mm wire slots.
Weighted Yaw Base Tub
The foundation of the 'MG90S Animatronic Desk Lamp Robot' kit. It is a round tub, 120 mm OD x 40 mm tall, and the turntable skirt centres on a built-in thrust rim: a flat annulus from r=54 to r=60 at Z=40 with a 45° chamfered ledge underneath. Two 10 mm posts hold the slotted micro-servo plate on M3 heat-set inserts, so an MG90S or SG90 yaw servo hangs in a clear bay. A ring trough at r=41–57 holds steel washers or BBs as ballast, and a 14 x 10 mm notch lets the cable out.