Hi all,
I’m trying to specify a dispense height such that only ~2mm of the 8 channel tips enter the septum of some 50mL tube caps I’m testing. When I try to change the ‘fix height from bottom,’ I get a minZerror message. Is there a way to bypass this, or a better recommendation to accomplish this dispense?
@max_gildemeister - Can you post a screenshot of your dispense settings? Depending on the tip type you are using (lower than 1mL tips), it would be expected that you would have minimum Z access issues if you were dispensing from a fixed height of 2mm relative to the bottom of a 50mL tube, but not relative to the top.
-Nick
Here are the settings, @NickHealy_Hamilton. int_MixCycleCount = 0. Also I was wrong, it was minZPosition not minZerror.
![Screenshot 2023-04-03 113142](https://forums.pylabrobot.org/uploads/default/original/1X/8b9137a36b81ff28259dab04cf7e39d6d06e43dc.png)
![Screenshot 2023-04-03 113325](https://forums.pylabrobot.org/uploads/default/original/1X/354f6a66777955f89a7526e96de5b197275a569b.png)
![Screenshot 2023-04-03 113739](https://forums.pylabrobot.org/uploads/default/original/1X/b2126865053abae9c1d66281a69a69b16b9ccbe2.png)
@max_gildemeister - Your dispense height is higher than the pipettor traverse height, and almost certainly higher than the channel can reach with a tip loaded (not to mention likely higher than the height of the container from the labware definition).
![image](https://forums.pylabrobot.org/uploads/default/original/1X/ad5065de9a27b446bac7bfead3080d94a8a74e70.png)
50mL conical tubes should be much shorter than this, unless you are using some highly custom labware. I recommend breaking out a pair of calipers and double checking.
-Nick
Thanks Nick! Yeah that value was from the position I got from training the 1000uL channel, guess it was too high. I lowered it and everything’s working.
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