Partial tip pickup with p300 multi

Opentrons
1

Hello friends,

I just joined a lab with a three year old OT-2 that has never been used and I am trying to familiarize myself with it. I have quite a bit of robotics experience and I’m good with Python so I’ve been using the Python API. So far I’ve built a few different protocols and things seem to be working fine.

However I am in a bind for pipettes. I have a p20 single and a p300 multi and I need to also do some single wells for volumes too large to use the P20. So I’d like to use the p300 with just one or two tips in place.

I am wondering if it is possible to use the p300 multi to pick up fewer than 8 tips at a time by offsetting the pipette when it goes to retrieve a tip. Is this something that can be done through the Python API.

Or do I just have to re-organize the tip box to leave out the tips in the positions that I don’t want picked up. That’s what I am doing now but it seems like this robot should be able to pick up tips on only one side of the pipette.

2

Hey @Delta_G - this functionality will be released in our 8.0 software release September 23rd!

3

Awesome! That’s soon. I’ll stop hacking and wait for that.

1 Like
4

There was a pretty hacky way to do it, but the volumes were uneven across channels, so we’re making it a core feature of the API :slight_smile:

1 Like
5

I found this page

but it only talks about assigning the tip racks and makes no mention of how to actually do the pickup. Was maybe something left out here?