After following the build instructions from the OSSPL [1] I realised that:
- Some steps were not descriptive enough
- The Bill of Materials had some wrong quantities
- What 3D printed parts need changes to improve the build process
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Modify openSCAD file to print spacing for the 2 linear bearings to fit without having to cut into either side of the carriage - isn't easy and is also dangerous
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Allow spacing all the way through the 3 rod holes so the builder doesn't have to cut these out themselves
- Modify this to be wider and taller to fit up to a 60mL syringe - take measurements from 20mL and 60mL syringe plungers so all sizes inclusive will fit
Currently can think of 2 options for changing this:
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Make an adjustable body holder made for a 60mL syringe, with a fitting for smaller sizes to stop the syringe moving around
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Modify the openSCAD file to make multiple body holders that can be swapped out once syringe sizes change
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Used 4 extra M3 hex nuts for spacing between the motor end and the M3x20mm cap screws holding the motor in place
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Replaced 2x M3x10mm cap screws with M3x20mm cap screws for attaching the carriage to the plunger holder - 10mm screws were not long enough to hold them together
[1] https://www.appropedia.org/Open-source_syringe_pump#How_to_Build_an_Open-source_Syringe_Pump