Difference between revisions of "Team:Aachen/Notebook/Construction Manuals/Pumps"
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{{Team:Aachen/Figure|Aachen_PumpSpring_Side_1.JPG|title=Pentagonal spring rotor|size=medium}} | {{Team:Aachen/Figure|Aachen_PumpSpring_Side_1.JPG|title=Pentagonal spring rotor|size=medium}} | ||
The 3D structure that we developed has five wing like protrusions coming out from the base which hold the ball bearings. The wings are used to press into the tube hence creating the required pressure to move the fluid. Two 3D-printed spring structures were designed with either single-sided or sandwich mountings for five ball bearings. | The 3D structure that we developed has five wing like protrusions coming out from the base which hold the ball bearings. The wings are used to press into the tube hence creating the required pressure to move the fluid. Two 3D-printed spring structures were designed with either single-sided or sandwich mountings for five ball bearings. | ||
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===Stepper Driver=== | ===Stepper Driver=== | ||
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<center>{{Team:Aachen/Figure|Aachen_StepperDrivers.jpg|title=A4988 |subtitle=Stepper Driver.|size=small}}</center> | <center>{{Team:Aachen/Figure|Aachen_StepperDrivers.jpg|title=A4988 |subtitle=Stepper Driver.|size=small}}</center> | ||
Each pump is powered through a Stepper Driver A4988 <ref>http://www.pbclinear.com/Download/DataSheet/Stepper-Motor-Support-Document.pdf</ref> at up to 12 V / 1.7 A. | Each pump is powered through a Stepper Driver A4988 <ref>http://www.pbclinear.com/Download/DataSheet/Stepper-Motor-Support-Document.pdf</ref> at up to 12 V / 1.7 A. | ||
This breakout board for Allegro’s A4988 microstepping bipolar stepper motor driver features adjustable current limiting, over-current and over-temperature protection, and five different microstep resolutions (down to 1/16-step). It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling). This stepper motor driver lets you control one bipolar stepper motor at up to 2 A output current per coil. | This breakout board for Allegro’s A4988 microstepping bipolar stepper motor driver features adjustable current limiting, over-current and over-temperature protection, and five different microstep resolutions (down to 1/16-step). It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling). This stepper motor driver lets you control one bipolar stepper motor at up to 2 A output current per coil. | ||
The steppers used along with these drivers can increase or decrease the number of steps according to the following table : | The steppers used along with these drivers can increase or decrease the number of steps according to the following table : | ||
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''Steps'' | ''Steps'' | ||
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We have used the Full Step function for the Aeration pump and the half step function for the feed and the harvest pump. | We have used the Full Step function for the Aeration pump and the half step function for the feed and the harvest pump. | ||
Revision as of 13:19, 18 September 2015
- ↑ https://www.pololu.com/file/download/a4988_DMOS_microstepping_driver_with_translator.pdf?file_id=0J450
- ↑ http://www.ti.com/lit/ds/symlink/max232.pdf MAX232
- ↑ http://www.pbclinear.com/Download/DataSheet/Stepper-Motor-Support-Document.pdf