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Model Forum / General / Models / December 2006Bridgeport Stepper motor problem
Any experts here on Bridgeport stepper motors? ( Machine is Series 2 mark 2 MDI ) My "Y" axis motor is buzzing like a good 'un, jerky operation, then overloads the trip, which blows out. Also, gives "Gross position error" even though its not !! Machine unable to be used in this condition. Bob > Any experts here on Bridgeport stepper motors? ( Machine is Series 2 mark 2 > MDI ) [quoted text clipped - 3 lines] > Machine unable to be used in this condition. > Bob John S is the expert I think - no doubt he'll be along in a while ! AWEM >> Any experts here on Bridgeport stepper motors? ( Machine is Series 2 >mark 2 [quoted text clipped - 9 lines] > >AWEM Series 2, Mk2 on steppers with 151 controller ??? Don't sound right to me, I'm no expert but I thought they were on servo's. Details off the plate please. -- Regards, John Stevenson Nottingham, England. Visit the new Model Engineering adverts page at:- http://www.homeworkshop.org.uk/ > Series 2, Mk2 on steppers with 151 controller ??? > Don't sound right to me, I'm no expert but I thought they were on > servo's. > Details off the plate please. Yes should be a SEM servo. Probably Bosch drives or Drive! I forget what that Gross Positional error means. I've only seen it when the servo lags terribly from commanded position, like when trying to rapid through a part ! Wayne... >>> Any experts here on Bridgeport stepper motors? ( Machine is Series 2 >>mark 2 [quoted text clipped - 22 lines] > Visit the new Model Engineering adverts page at:- > http://www.homeworkshop.org.uk/ The controller is a TNC 145, I only assume they are steppers, limited knowledge. I'm home know so cant access the plate details. One theory I was offered was that the motor needs cleaning and checking the brushes, if that offers any clues to the motor? Bob >>>> Any experts here on Bridgeport stepper motors? ( Machine is Series 2 >>>mark 2 [quoted text clipped - 28 lines] >offers any clues to the motor? >Bob I have had one shed the magnets off the inside when the glue has let go [ no joke - true ] Tends to shag the whole lot up as they are very friable. If the advise is genuine about the brushes then yes it is a servo. I may have a motor but it depends on the plate details. You can strip these and clean them. the usual test is to swap leads over to another axis to prove the motor driver combination. -- Regards, John Stevenson Nottingham, England. Visit the new Model Engineering adverts page at:- http://www.homeworkshop.org.uk/ >>>>> Any experts here on Bridgeport stepper motors? ( Machine is Series 2 >>>>mark 2 [quoted text clipped - 46 lines] > bought it from, so I guess he knows about these things. If you do have > one, I would be most interested, falling down water vouchers available!! Bob > Any experts here on Bridgeport stepper motors? ( Machine is Series 2 mark 2 > MDI ) [quoted text clipped - 3 lines] > Machine unable to be used in this condition. > Bob Unless the 145 is a retrofit it should have SEM servo motors and Z15 or 16 drives."gross positioning error"means the error is on the machine and not the control.The sem motors have the encoder built in and require a bit of care stripping and rebuilding.It sounds like carbon brush/carbon build up problem but before stripping it check the gibs and slide for mechanical binding.If you take the axis motor off you have to reset the software limits after refitting.It would be worth getting yourself a copy of the maintenance manual,they are on ebay quite often. Mark www.ems-fife.co.uk >> Any experts here on Bridgeport stepper motors? ( Machine is Series 2 mark 2 >> MDI ) [quoted text clipped - 16 lines] > >www.ems-fife.co.uk My Series1 mark 1 MDI had SEM motors but he encoder was on the end as normal, tacho is inbuilt. The Encoders on this model were only 125 count and I think analogue. I have the books on the 145, in fact I have most of the Heidenhain books that the service guys carried. . -- Regards, John Stevenson Nottingham, England. Visit the new Model Engineering adverts page at:- http://www.homeworkshop.org.uk/ > My Series1 mark 1 MDI had SEM motors but he encoder was on the end as > normal, tacho is inbuilt. [quoted text clipped - 9 lines] > John Stevenson > Nottingham, England. Most of the Heidenhain manuals including the 145 are available for free download from www.heidenhain.de Won`t tell you anything about SEM motors though. Mark. >> My Series1 mark 1 MDI had SEM motors but he encoder was on the end as >> normal, tacho is inbuilt. [quoted text clipped - 14 lines] >Won`t tell you anything about SEM motors though. >Mark. Won't argue with you but Heidenhain have dropped a lot of info off their website as they have discontinued support on the older controls. Only reference I can find to the 100 series is for the124 model. -- Regards, John Stevenson Nottingham, England. Visit the new Model Engineering adverts page at:- http://www.homeworkshop.org.uk/ >>> My Series1 mark 1 MDI had SEM motors but he encoder was on the end as >>> normal, tacho is inbuilt. [quoted text clipped - 27 lines] > Visit the new Model Engineering adverts page at:- > http://www.homeworkshop.org.uk/ I have 3 manuals for this machine, as suggested, I got them off eBay. The manuals all relate to the series 2 Interact 2, looks identical to mine, except my machine is a series 2 MDI 2. One is a maintenance manual, but doesn't give any detail relating to motor stripping. I will carefully strip the motor Saturday. There does appear to be some sort of encoder on the end of the motor, the thin wire as opposed to the one inch diameter plastic flexible conduit connection. Unless anyone is willing to offer me a "service exchange" ? Thanks for all the help and advice from everyone. Bob > >Most of the Heidenhain manuals including the 145 are available for free > >download from www.heidenhain.de [quoted text clipped - 10 lines] > John Stevenson > Nottingham, England. Still there John.Everything from the 111 to 155.Take a bit of finding sometimes. regards, Mark. >> >Most of the Heidenhain manuals including the 145 are available for free >> >download from www.heidenhain.de [quoted text clipped - 15 lines] >regards, >Mark. I've noticed that. Heidenhain have tried to hide all the useful stuff on their site. Probably a marketing "improvement". Charles >>> >Most of the Heidenhain manuals including the 145 are available for free >>> >download from www.heidenhain.de [quoted text clipped - 21 lines] > > Charles Unreal happenings !! Turned the mill on today, usual problem, machine alive, but TNC dead. Switched it on and off 20 times, then bingo, life in the TNC. Passed over ref points, then almighty buzzing and shuddering from the "Y" axis motor. Switched off and left it for an hour. Switched back on, and then it acted perfectly apart from a slight buzz/humm from the "Y" axis motor. Does someone up there know how to give me ulcers ?? Bob >Unreal happenings !! Turned the mill on today, usual problem, machine alive, >but TNC dead. Switched it on and off 20 times, then bingo, life in the TNC. [quoted text clipped - 3 lines] >Does someone up there know how to give me ulcers ?? >Bob Is there enough of a hum for you to be able to play it ? . -- Regards, John Stevenson Nottingham, England. Visit the new Model Engineering adverts page at:- http://www.homeworkshop.org.uk/ > Unreal happenings !! Turned the mill on today, usual problem, machine alive, > but TNC dead. Switched it on and off 20 times, then bingo, life in the TNC. [quoted text clipped - 3 lines] > Does someone up there know how to give me ulcers ?? > Bob I think soon that machine will either be at the scrappy or you are going to be a frequent visitor to the Mach3 forum and learning a lot about retrofitting ;) Depending on your time and inclination retrofitting might be a good step Wayne.... >> Unreal happenings !! Turned the mill on today, usual problem, machine >> alive, but TNC dead. Switched it on and off 20 times, then bingo, life in [quoted text clipped - 11 lines] > > Wayne.... Think again................... >> Depending on your time and inclination retrofitting might be a good step >> >> Wayne.... > > Think again................... Well Bob, It was more a suggestion if things really start to get out of hand ;) I had a dead machining centre that I had no hope of getting much support for. About 700 quid later it's now able to run 10 hours a day 7 days a week with no problems whatsover. If it goes wrong, then I can now get the parts more or less anywhere, and not held hostage by the normal CNC ripoff businesses. BTW I got a stack of TNC145 cards here somewhere LOL.... Wayne... >>> Depending on your time and inclination retrofitting might be a good step >>> [quoted text clipped - 13 lines] > > Wayne... I think I am suffering dodgy a connection somewhere in the cabinet since the torturous move it had to my place. A friend has sent a very clever chap to me who is able to strip and rebuild the motors, theoretically. I'm open to offers on any cards !! Bob > I think I am suffering dodgy a connection somewhere in the cabinet since the > torturous move it had to my place. > A friend has sent a very clever chap to me who is able to strip and rebuild > the motors, theoretically. I'm open to offers on any cards !! > Bob Bob Did you get it reliable again? >> I think I am suffering dodgy a connection somewhere in the cabinet since the >> torturous move it had to my place. [quoted text clipped - 5 lines] > >Did you get it reliable again? He's got most of the bits. Ear of Bat came by UPS today, but Wicke's were out of Tongue of Newt. . -- Regards, John Stevenson Nottingham, England. Visit the new Model Engineering adverts page at:- http://www.homeworkshop.org.uk/ > He's got most of the bits. > Ear of Bat came by UPS today, but Wicke's were out of Tongue of Newt. Yes my Daughter has the service manuals and training DVD's for those TNC's. Meg & Mog. ( About a Witch and her cat for those that don't know!) Wayne... > Did you get it reliable again? Not really, motor buzzed awfully on Saturday, waited for chap to look at it, switched on, and motor behaved all the time he was there, as did the on/off scenario with the TNC. Typical !! Switched on this morning, no TNC, couldn't mess about today as busy, but guess 20 odd times with the on/off switch would catch it, one suggestion is loose connection in "Gubbins" box after truck journey to me. I'm open to a "service exchange motor"or any reliable solutions, apart from scrapping it. Bob >> I think I am suffering dodgy a connection somewhere in the cabinet since >> the torturous move it had to my place. [quoted text clipped - 5 lines] > > Did you get it reliable again? Can you do me deal with a motor?, I forgot to get the plate details, will update later this week. bob >> Did you get it reliable again? > > Can you do me deal with a motor?, I forgot to get the plate details, will > update later this week. > bob Bob. Although I have three motors here from a series 1 Interact they have been modified by me, and will be used here. I still have the machine, and some of the control. I may yet rebuild it as a machine to do rougher work on. The mods I did were basically taking off the heidenhain analogue encoders, which I still have. I replaced them with quadrature encoders for the drives I normally use. When I get a moment I'll have a look and see what can be disposed of, and let you know. Shame you were not local I'd give you a hand. Wayne... > >> Did you get it reliable again? > > [quoted text clipped - 17 lines] > > Wayne... Wayne, If the time comes when you want to dispose of one or two of the analogue encoders can you please get in touch. Regards, AWEM > If the time comes when you want to dispose of one or two of the > analogue encoders can you please get in touch. OK Andrew Will do. Might be quite soon as I have to get those motors out when a drive designer comes to see me next month. The encoders are still with the motors somewhere. Sometimes I regret being such a hoarder. Wayne... >>> I think I am suffering dodgy a connection somewhere in the cabinet since >>> the torturous move it had to my place. [quoted text clipped - 9 lines] >update later this week. >bob Bob, I have some spare motors taken from working machines but need plate details first. . -- Regards, John Stevenson Nottingham, England. Visit the new Model Engineering adverts page at:- http://www.homeworkshop.org.uk/ >>>> I think I am suffering dodgy a connection somewhere in the cabinet >>>> since [quoted text clipped - 24 lines] > Visit the new Model Engineering adverts page at:- > http://www.homeworkshop.org.uk/ OK. thank you. I will get the details from the plate on Friday and post it in this group. Bob ">> Bob, >> I have some spare motors taken from working machines but need plate >> details first. [quoted text clipped - 5 lines] >> John Stevenson >> Nottingham, England. I was offered the services of a Bridgeport Engineer today, bad news and good news ! The servo gave all the correct readings, didn't act up, and the engineer said he wouldn't expect it to be any better if cleaned. Now the bad news. The machine was on, but the controller didn't power up.Power is at correct voltage into the Controller.So the on/off problem with the Heidenhain is not the switch, At first a diode was suspect, but was ok, as was the one beside it. Disconnected all the ancillary cables, still nothing. I then did my usual, switch it on and off lots of times, bingo, powered up. So the fault is intermittent, sadly, that was the end of the engineers expertise, referring me to an exchange main board. After I got up from the floor (How much !!) I am now no wiser. Guess I'll just leave it on even when I'm not there. Bob |
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