I did not realize that you were running the power through a step up transformer in the machine.
I don't think that another reactor is going to help. That transformer is going to clean up the power a lot also. What I would do is to write down all of the part numbers you have in the 611 Rack, just go left to right and also include the commutating reactor in the list, and give these guys a call. *Siemens Industry, Inc.,* 390 Kent Ave., Elk Grove Village, IL 60007, (847) 640-1595, /www.usa.siemens.com/motioncontrol/ <http://www.usa.siemens.com/motioncontrol> If that number doesn't get you to tech support for some reason, call 1-800-333-7421 and they should be able to redirect your call. Ask for Tech Support, they will ask what equipment you are calling about, tell them you have a 611 drive system and are having problems with it and looking for advice. Give them your company name and contact info etc etc... When you talk to the Tech guy, tell them that the 611 is installed in CNC machine, (important - as they work mostly with CNC machine applications), you are having some power issues, and you are looking for advice. Tell them you are trying to run the machine off of a rotary phase converter, that the phase converter works on your other machines just fine, then tell them how the 611 reacts/faults. Give them all and any information. Sometimes if they get backed up they will put you into a wait list and call you back when they become available. That is perfectly normal. ** Most of the people there are friendly. If they sound rushed or stressed out, tell them your situation is not an emergency and they can call you back if that would be better, etc. I would not call towards the end of the day (after 3:30pm or so, they are on central time - Chicago) as work tends to stack up for them near the end of the day. If for some reason you get an uncooperative person who simply does not want to assist, politely cut the conversation off and call back again in a few days - chances are you will get someone else. It is possible that there are some parameters in the drive system that can be changed in order to make the 611 less power sensitive. They would know that. If so, ask them what software packages would be required to make the parameter changes and what parameters would need to be altered. You might want to ask them if the manuals for your drive system and the software is on the web. If it is they will probably offer to send you the web links via an email. For the most part, the people in Elk Grove are incredibly helpful, but the tech support guys sometimes get hammered and their stress can become evident on the phone. I used to work for Siemens. Not directly for that group, but I talked to them frequently. I was in the automation business group. Dave On 5/25/2012 6:56 AM, John Thornton wrote: > It's hard to say but I "think" the 15hp motor worked the best. I've been > running and trying different things for a 1 1/2 years so my memory is a > bit clouded on exactly how it worked or didn't work. I do know at one > time my workaround was to ramp up the spindle from 2k to 6k and it ran > like that and that was on one of the 10hp motors. > > Do you think adding a line reactor after the rotary phase converter > would help in any way? I can get a 3 phase 20hp one for $150 so it is > cheap enough to try if anyone thinks it might help in any way. > > http://www.automationdirect.com/adc/Shopping/Catalog/Drives/GS2_%28115_-z-_230_-z-_460_-z-_575_VAC_V-z-Hz_Control%29/AC_Line_Reactors/LR-2020 > > Taking the reactor out of the VMC sure made it worse... and the scope > trace looked horrible jagged. > > Just to refresh the circuit is: [ stuff in brackets ] is inside the machine. > > phase converter> [ step up transformer> commutating reactor> infeed > unit (power supply)] > On 5/24/2012 8:37 PM, Jon Elson wrote: > >> John Thornton wrote: >> >>> This is the third motor I've tried on this beast. The current one is a >>> 15hp 1750 rpm very heavy built with a large multi-belt pulley on the >>> shaft. I've tried cap combinations out the yen yang. The voltage levels >>> I reported a while back was with different combinations of caps to >>> balance the generated leg. >>> >>> >> Did any of these motors make a difference (better or worse)? >> >> Jon >> >> ------------------------------------------------------------------------------ >> 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. 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