Hi Gregg, Insulating the whole place and getting it to cool would be indeed cool lol. But the problem is we already had hot days and this didn't happen. Yesterday was one of the worst days but it looks like something else.
I was thinking about checking the spindle rotation at slow speed for a few seconds and put a piezoelectric mic next to it to hear if maybe there are bumps or something within the bearings. Maybe it's so subtle that it only makes the whole unit overheat when at full speed cutting for several minutes. Because this doesn't seem to happen with no load. I'll leave it spinning with no load for 20 minutes today to see how it goes. Because the problem only happens when cutting from what I experienced yesterday. But since this all started yesterday I can't tell for sure. Thank you! El dom, 5 mar 2023 a las 6:50, Gregg Eshelman via Emc-users (< emc-users@lists.sourceforge.net>) escribió: > You could try a micro compressor refrigeration system to cool the air that > the spindle cooling fan takes in. > Here's a unit for $149.78 USD. Have to supply your own evaporator coil. > https://www.aliexpress.us/item/3256804487578057.html > > This one is less compact but includes a cooling coil. > https://www.aliexpress.us/item/3256802213783912.html > > Could put the coil into a tank of antifreeze then pump antifreeze through > a radiator over the air cooling fan inlet. > > Or to be much more comfortable overall, insulate the heck out of your shop > and install a really nice mini-split heat pump. Big shop? Get a mini split > that supports two or more air handlers. > > > I've heard that these tiny refrigeration compressors were originally > designed for a US military project that got canceled. Having already done > the R&D to a production ready state, the companies which submitted designs > put them into production for civilian use. Now there are many companies > making portable refrigerator / coolers that can run off battery power for > longer than the thermo-electric coolers that have been around since the > 1970's. > > > On Saturday, March 4, 2023 at 11:54:31 AM MST, Leonardo Marsaglia < > ldmarsag...@gmail.com> wrote: > > Hi guys. > > Sorry for the OT but I'm having a strange behavior with my spindle and I'm > a little worried. > > The problem I had today for the first time is the spindle was getting > really hot and started to slip (you could hear the frequency from the > inverter was on spot but the rotor sometimes wasn't even turning).After a > few seconds of slipping the VFD triggered the over current alarm and the > spindle was stopped. Once the the spindle cooled down it worked perfectly. > This never happened before but also I must clarify that today the ambient > temperature reached 40⁰C and I'm sure that under that roof where the router > is placed there were 45⁰C so I suspect this has something to do with the > problem. > > The spindle is rated 11kw of max power output and is air cooled. It has a > built in fan motor so it doesn't rely on spindle speed for cooling. It > always gets warm (there are several labels on the spindle’s body for > caution because of the heat) but nothing like today. > > Could this be normal because of the extremely hot days I'm having here? > Should I think about changing bearings or even rewind the motor? I've only > had the over current alarms when the spindle was too hot. > > I will be really thankful if you can share your thoughts about this. > > Thanks for your help as always! > > Leonardo. > > > _______________________________________________ > 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
