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Commutator Mechanical
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QtyPartDescriptionPart No.LinkNotes
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Single Channel Commutator Mechanical (Rev. A)
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1RF Rotary JointSMA-f (50 Ω) , DC-18 GHzBN 835047C0010link
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1NEMA 11 motor45mm length, 1.8 deg step angle, ~600mA max current11HS18-0674SlinkAny NEMA 11 stepper with a shaft length of 20mm from the face plate
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13D printed caseShapeways PA12 with glass beadshttp://shpws.me/RE83Can be purchased directly through shapeways shop
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13D printed motor gearShapeways super fine clear plastic qualityhttp://shpws.me/RE7RCan be purchased directly through shapeways shop
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13D printed commutator gearShapeways super fine clear plastic qualityhttp://shpws.me/RE7YCan be purchased directly through shapeways shop
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3M2.5 X 10mm screwsfor attaching the rotary joint to the case91290A103link
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8M2.5 x 6mm screwsfor attaching the motor and PCB to the case91290A102link
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Dual Channel Commutator Mechanical (Rev. A)
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1Dual RF Rotary JointSMA-f (50 Ω) , DC-18 GHzBN 153127C0001link
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1NEMA 11 motor45mm length, 1.8 deg step angle, ~600mA max current11HS18-0674SlinkAny NEMA 11 stepper with a shaft length of 20mm from the face plate
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13D printed caseShapeways PA12 with glass beadshttp://shpws.me/RHw0Can be purchased directly through shapeways shop
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13D printed motor gearShapeways super fine clear plastic qualityhttp://shpws.me/RE7RCan be purchased directly through shapeways shop
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13D printed commutator gearShapeways super fine clear plastic qualityhttp://shpws.me/RHknCan be purchased directly through shapeways shop
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3M2.5 X 10mm screwsfor attaching the rotary joint91290A103link
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8M2.5 x 6mm screwsfor attaching the motor and PCB91290A102link
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SPI Commutator Mechanical (Rev. A)
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1Slip Ring Joint12-channel Slip Ring with Omnetic ConnectorsCustom from Orbex Group
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1NEMA 11 motor45mm length, 1.8 deg step angle, ~600mA max current11HS18-0674SAny NEMA 11 stepper with a shaft length of 20mm from the face plate
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13D printed caseShapeways PA12 with glass beadshttp://shpws.me/TtobCan be purchased directly through shapeways shop
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13D printed motor gearShapeways super fine clear plastic qualityhttp://shpws.me/TtocCan be purchased directly through shapeways shop
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13D printed commutator gearShapeways super fine clear plastic qualityhttp://shpws.me/TtodCan be purchased directly through shapeways shop
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3M5 x 10mmFor holding the slip ring; Use epoxy to secure97763A820link
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3Lock WashersFor holding the slip ring97093A113link
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8M2.5 x 8mm screwsFor attaching the motor and PCB; Use epoxy to secure97763A415link
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Many epoxies and glues you many have on-hand suffice. For the purpose of assembling these commutators, we use a general-purpose 5-min epoxy from Bob Smith.
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