I can't honestly say if the lights are the same, but I'll notice from now on. BTW, the bottom 4 leds were lit up on the infeed unit the last time I checked after a fault.
The unit itself does have a fan plus a fan in the door in front of the 611. The internal fan was pretty gummed up when I replaced the capacitors in the infeed unit. I'll see if I can see the fan with a mirror to see if it is running. The internal fan was on the heat sink for the mosfet's or something that looked like that. John On 6/3/2012 9:06 AM, Dave wrote: > Are the lights on the infeed unit when a drive fault occurs identical to > what you saw before? > > >>So now I'm thinking that there might be an actual problem in the > > infeed unit because once it starts to trip out if I reset the machine > and start running again it trips out real fast.<< > > This sounds like a thermal issue. Once it cools off it is good for a while. > But until it cools off it trips out immediately. > > Does your infeed unit have a fan in it? Is it working? If not, open the > cabinet and aim a room fan at the unit and see if you can get more time out > of it. Or better yet attach a fan to the bottom or top of it to blow some > air through it. A larger pancake type fan would work. > > If the fan in the infeed unit is working ok, the infeed waveform distortion > might be causing some issues in the Infeed unit, or you might have some weak > components. > > Sounds to me like you are close to solving these problems if you can get an > hour our of it. > > Still, a drive isolation transformer might clear up these problems entirely > (assuming the infeed unit is not malfunctioning) > > Dave > > > > > > > > On 6/3/2012 9:08 AM, John Thornton wrote: >> Currently with the 10hp idler and the Samson lathe running as a second >> idler and the 611 in the BP 308 on I have the voltage balanced at 245 >> between all three phases give or take one volt. The VMC will make parts >> and run at 2k with full rapid speeds or ramp up with G code to 6k and >> run about an hour or so before the drive trips out. Turning off >> everything for a while and whatever caused the trip seems to mend >> itself. So now I'm thinking that there might be an actual problem in the >> infeed unit because once it starts to trip out if I reset the machine >> and start running again it trips out real fast. >> >> Monitoring the generated phase voltage while running and during rapid >> moves of Z I see no more than one volt variation. So that seems pretty >> stiff to me. >> >> The spindle and axes are all Siemens AC servos. If I changed to a VFD >> then I would loose my tool changer which would suck. I'd be more >> inclined to buy another VMC that didn't have a Siemens Simodrive 611 >> than try and mod this one, then sell the Discovery 308 on flea bay. The >> sad part is I have more $ invested in BT30 tooling than I care to think >> about so that clouds the issue of getting rid of the 308 for another VMC. >> >> I plan on calling Siemens back to see if there is anything I might do to >> reduce the sensitivity of the drive. The one thing that sticks in the >> back of my mind is how crappy the wave form was when I removed the >> commutating reactor from the circuit... anyway a lot to wonder about. >> >> Thanks >> John >> >> On 6/2/2012 1:50 PM, Jon Elson wrote: >> ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
