On Monday 18 March 2019 09:10:04 Todd Zuercher wrote: > Don't discount pump heating of the water. Last week I was working on > one of our machines that was down with several issues (much larger > spindle 19hp). One of the problems was the cooling fan for the water > was dead. It was a lower priority than some of the other problems, so > I was working on it for a couple of hours with the power on, then went > look at the cooler and I was shocked at how warm the water was. > Without the spindle running at all, in the time I worked on the > machine, the water temp had risen from room temp to about 3 times > higher than it normally is with the spindle cutting and the cooling > fan working. The fan and radiators are very important on this 5 > gallon cooling system. > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031
Yes, I was somewhat surprised myself when after 3 days, the 3 gallons in my tank was up to 38C. Now my pump starts 1/2 second after the spindle, and stops 120 seconds after its shut down. And just this morning got all the pyvcp tallies working. At least showing pump power s/b on, no flow switch. :( Yesterday, on a Sunday even, saw the usps driver put a box on the chair just outside the front door, with a gallon of Kool-mist in it, so I discovered just how little suction the mister I bought had. Takes more air at a higher pressure than my 2hp AC is comfortable with to lift the coolant out of a dishwasher pod bucket sitting on the table about 4" below the bed surface. So I suspect I'll have to make a shelf on the side of the gantry to set the src container on, raising it about 4". The suction hose is also a bit short, so moveing the coolant tank with the gantry will help there too. So will approaching the mister valve from below, sucking hard enough to pull it over the top of the gantry crossbar takes way too much air. Then last night I plugged in the A table, but it stopped working as I believe I'll have to fix the windings order. Not the first time as no two motor cables are wired the same so I've had to adjust other motors already. And I think I've a hal routine to calibrate the rotation scale working by y measureing apos-fb for 100 clicks of the home switch. I like to be able to set angles to arc-minutes accuracy at least. :) Anybody interested in that hal code? > > -----Original Message----- > From: Ken Strauss <ken.stra...@gmail.com> > Sent: Friday, March 15, 2019 3:03 PM > To: 'Enhanced Machine Controller (EMC)' > <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] Spindle > motor coolant advice needed > > > -----Original Message----- > > From: Chris Albertson [mailto:albertson.ch...@gmail.com] > > Sent: Friday, March 15, 2019 1:44 PM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Spindle motor coolant advice needed > > > > When I had a coolant tank, for a different purpose, I put automatic > > "anti freeze in the water. It is make just for this purpose and is > > non-corrosive with materials used in car engines. > > > > Also, if the water recirculates it will eventually warm up. I put a > > 12 volt fan on the tank lid and made it into an evaporative cooler. > > Then you top off the tank with new water now and then. If the > > water is taking even 25 watts of heat from the system it will heat > > up quite a lot unless you rig some kind of cooling. > > How about using a radiator like > https://www.amazon.com/Computer-Radiator-Water-Cooling-Cooler/dp/B079D >HJ91F/ which is intended to cool CPUs? It comes with mountings for > three 120mm muffin fans. > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users 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) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
