On Monday 09 November 2020 16:31:24 [email protected] wrote: > Some time ago there was a little discussion about using a peristaltic > pump to supply coolant to a mister. Was this successful? Which pump > was used? Is silicone tubing resistant to coolant? > yes, but don't recall the part number, and yes the blue-green stuff doesn't do a thing to it. Teeny little motor rated for 12 volts. From ebay, about a tenner a copy. I rigged a couple oneshots cross coupled so I could adjust both on and off times to get the almost dry flow I wanted, and a 8oz coke bottle of the blue-green diluted mix lasts for hours and doesn't get wet enough to seep thru the tables micro-gaps, drying from the air flow about as fast as the mister sprays it. Air use is regulated to about 5 psi at the spray nozzle, works well but keeps a cheap 2hp compressor pretty warm. I buffered the timer outputs with a power transistor and a free wheeling diode, ditto for a 7i76D output to drive the air valve solenoid. The timers are adjusted by pyvcp sliders. If it hasn't run for quite a while I have to run the pump hard for 30 seconds or so to reprime it as its above the coke bottle, both carried on the left gantry upright. You'll see a 10 ft coil of cap tubing to help steady the pumps pulsing outout, hanging off the back of the gantry, but with the timers I don't think its needed anymore. I modded the nozzle for better atomization at lower air flow. pump is something like this:
<https://www.ebay.com/itm/12V-Mini-DC-Liquid-Water-Motor-pump-Fish-Tank-Dosing-Pump-Pump-Peristaltic-N9Z2/264825277172?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D225074%26meid%3D98cc936a6b4e41838be05f9f3ac66448%26pid%3D100005%26rk%3D4%26rkt%3D12%26mehot%3Dco%26sd%3D401740803167%26itm%3D264825277172%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv5PairwiseWebWithBBEV2bDemotionHighArwV3%26brand%3DUnbranded&_trksid=p2047675.c100005.m1851> Take care now Ken. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
