Thingiverse
Spacer for SRX Magnetic encoder am-3445 FRC robotics by WindTrackMind
by Thingiverse
Last crawled date: 4 years, 7 months ago
This is a spacer that allows the SRX Magnetic encoder (am-3445)
to be properly spaced above the Toughbox Mini (am-2236) or similar. The magnetic encoder is manufactured by CTR Electroncis and also sold by Andymark.com and is used in robotic building such as for FRC First Robotics competitions.
As of late 2017 / early 2018, the Toughbox gearbox included shaft now has a magnet in the end,
the benefit is that you don't have to machine a magnet into the end, but the drawback is that
the old way of mounting the magnetic encoder now requires an additional spacer such as
SRX Magnetic Encoder Mounting Hardware Kit (am-3565), but that kit is simply a grommet.
This 3d printable part is a spacer that should be of proper (approximate) height to go green with the LED.
Height of this part when printed in PLA should be 8.8mm. You can scale in Z if you need more / less height,
or you can sand some material off, or perhaps shim with milk jug material. We used 12mm long 3-48 type screws.
You can try 1/2" screws or cut a custom length screw. Note you only want about 3 mm of thread to enter the Toughbox Mini's black plastic, as below that plastic is a bearing, try not to go into area of bearing.
Other thoughts are that if you did print this with Flexible material, then you could adust height by screw tension (again dont enter area of bearing by going too deep into Toughbox).
And notes about proximity of magnet to encoder.
red and orange led if dist from magnet to detent of underside of encoder housing is 2.95mm or greater.
green led if distance 0.75mm to 1.5mm
to be properly spaced above the Toughbox Mini (am-2236) or similar. The magnetic encoder is manufactured by CTR Electroncis and also sold by Andymark.com and is used in robotic building such as for FRC First Robotics competitions.
As of late 2017 / early 2018, the Toughbox gearbox included shaft now has a magnet in the end,
the benefit is that you don't have to machine a magnet into the end, but the drawback is that
the old way of mounting the magnetic encoder now requires an additional spacer such as
SRX Magnetic Encoder Mounting Hardware Kit (am-3565), but that kit is simply a grommet.
This 3d printable part is a spacer that should be of proper (approximate) height to go green with the LED.
Height of this part when printed in PLA should be 8.8mm. You can scale in Z if you need more / less height,
or you can sand some material off, or perhaps shim with milk jug material. We used 12mm long 3-48 type screws.
You can try 1/2" screws or cut a custom length screw. Note you only want about 3 mm of thread to enter the Toughbox Mini's black plastic, as below that plastic is a bearing, try not to go into area of bearing.
Other thoughts are that if you did print this with Flexible material, then you could adust height by screw tension (again dont enter area of bearing by going too deep into Toughbox).
And notes about proximity of magnet to encoder.
red and orange led if dist from magnet to detent of underside of encoder housing is 2.95mm or greater.
green led if distance 0.75mm to 1.5mm