STAR pipettes: where each channel's piston stands, in uL - #1339
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Nothing could read a channel's dispensing drive, so where its piston stood was unknown. dispensing_drive_request_uL_position reads one channel's, `Px RD`, in uL; dispensing_drives_request_uL_positions reads every channel's, by channel. The simulator answers from where it has each piston, at rest until something moves it. The reads record what they read on piston_positions, one entry per channel; the all-channel read takes the channels to ask, reads them together and answers None for the rest. Initialization homes the pistons, so it ends with the first read. The setup-sequence test no longer pins where the autoload, its own unit, comes up among the arm's features. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Nothing could read where a channel's dispensing drive stands, so there was no way to check how much a channel holds or where its piston was left.
dispensing_drive_request_uL_position(channel)reads one channel's dispensing drive (Px RD) and converts it to uL.dispensing_drives_request_uL_positions(channels=None)reads the channels asked, together, and answersNonefor the others.pipettes.piston_positions, one entry per channel; a channel not asked keeps its record.initializehomes the pistons, so it ends with the first read of every channel.RDfrom a per-channel piston volume.Tests: the exact
RDframe and conversion, the record after initialization and after a read, a partial read leaving the others' record alone.🤖 Generated with Claude Code