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840d controller using in VTL machine - ATC is sometimes forgetting its reference

Created by: Abhikk at: 7/15/2013 10:05 AM (6 Replies)

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7/15/2013 10:05 AM	Rate (0)
Abhikk Posts: 12 Rating: (0)	Dear experts I have siemens 840d controller, Using in VTL machine, we are using ATC Magzine as one axis. differnce bitween two pockets is 18 degree. we are totally 20 pot magzine. Now my question is The ATC is sometimes forgetting its reference, not going to commanded pot position and we need to position the atc manually then referncing after that it work for 2-3 days again same problem repeating. so kindly help me through this. WHY IS ATC REFERENCE DISTURBING ????????????????? Thanks in advance...
Abhikk Posts: 12 Rating: (0)	Last edited by: CS Moderator at: 7/16/2013 11:39 AM new subject after splitting from /tf/WW/en/Posts/73985#top
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7/15/2013 11:12 AM	Rate (0)
APC Tech Team Posts: 391 Rating: (50)	840D pl or 840D sl ? is the encoder absolute ? is the Magazin a index axis ? that you are doing then you set the reference of Magazin ? maybe the Magazin is lost the relation between Axis Positon and Pot Number.
APC Tech Team Posts: 391 Rating: (50)
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7/27/2013 11:54 AM	Rate (0)
Abhikk Posts: 12 Rating: (0)	dear experts Its 840d power line
Abhikk Posts: 12 Rating: (0)
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7/27/2013 11:56 AM	Rate (0)
Abhikk Posts: 12 Rating: (0)	dear experts 840d pl Absolute encoder Magzine a index axis. I have referenced so many times, but it works healthy for 2-3 days. Dear APCtell me howthe Magazin is lost the relation between Axis Positon and Pot Numbe
Abhikk Posts: 12 Rating: (0)	Last edited by: Abhikk at: 7/27/2013 11:59 AM Last edited by: Abhikk at: 7/27/2013 11:57 AM
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7/27/2013 12:33 PM	Rate (0)
CraigSimpson Posts: 159 Rating: (1)	I assume this is the motor encoder and no secondary scale/encoder is in place? Possibly faulty encoder or mechanical drive slipping. Some machines do not have a direct mechanical drive in case of a collision. Maybe this mechanical drive setting is too weak?
CraigSimpson Posts: 159 Rating: (1)
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7/27/2013 12:55 PM	Rate (0)
Abhikk Posts: 12 Rating: (0)	dear sir i Checked for mechanical slipage but not found.
Abhikk Posts: 12 Rating: (0)
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7/28/2013 6:02 PM	Rate (0)
Ekalavya Posts: 2964 Rating: (484)	Hello, What is the Encoder resolution are you using ??? What are the parameters are you using for referencing your axis ? i hope you are looking in properly.. Please check the mechnicals could be some where there is getting problem.. Check it and revert back. Regards, Prakash
Ekalavya Posts: 2964 Rating: (484)
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