Mist Coolant Project

[cropwell]

Sounds good ! I have a spare stepper and driver plus I think there is a psu somewhere. I guess a variable pulse generator is a pretty cheap module to buy ?
Silly question but does the drip feed into the last part of the nozzle inside the tube or does it drip into the air flow?

This is the nozzle I bought https://www.aliexpress.com/item/New-...1-dc8fbff7776e

It has liquid fed to the centre and air around it. The airflow atomises the coolant. I am not sure, but I think it also generates a venturi vacuum to pull the coolant into the air stream.

I think this is the one that Nick used, but there are more pulse generators than you can shake a stick at on AliExpress.

https://www.aliexpress.com/item/8-24...4-a44ab6a74f1d

[magicniner]

You don't want Atomised coolant, you want the drops to be large enough to drop out of the air, Atomisation is easy with any Scent-Spray type arrangement but it will bugger your respiratory system unless you use truly massive extraction, enough to negate the heating in any shop on a cold day!

[cropwell]

Exactly right Nick! That is why I was thinking of the step system so that you delivered coolant without air or air without coolant (or both or neither) at each step of the 8 step sequence. The mister nozzle I bought was to experiment with, if you used it as designed you would get a fog in the workshop.