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CS-Lab / Re: Bridgeport Romi lathe retrofit with csmio ipa
« on: March 14, 2017, 12:12:51 AM »
Hi Mike. Emailed the company about the servo drives. http://www.trminternational.com/
Not sure if that will work as a link,so you might need to google the name. Very helpful. Plan on using two of their 20A drivers coupled to a csmio ipa.Long and the short of it is,that 99v is the maximum you can run as the overvoltage protection will shut the drive down at 101v. Being a local manufacturer does help. Also had a chat to one of the old boys at work. He explained one of the quirks of our power supply grid. Here in the Uk we run 240v ,50hz. Most houses are single phase,the street lights are normally on a different phase,and industrial is three phase. I am pretty rural,down in the South East of England,not far from Rye and Hastings. Two of the phases when measured are over 240v and the third phase is quite along way down. At home it measures out at 248v. At the shop two phases measure out at 248v, with the third being down at 231v. Because of this,the psu outputs about 104v which isn't any good for my needs. Everyday a school day!
So,the plan is to get a 2kva toroidal transformer with two windings of 70v. Run the two windings in parallel to double up the amperage,use a 50A bridge rectifier ,a bleed resistor and a smoothing capacitor. This should result in a voltage between 94-98v, dependant on the capacitor used. Psu will be able to supply 28A which will be more than enough.Not sure about re using the old capacitor,have been told to be wary of big electrolitic capacitors that have stood unused for many years. Apparently they should be reformed with a lower voltage before reuse? So, I might go down the route of using a bank of new,smaller capacitors connected in parallel for the smoothing part of it.
Well, I haven't gotten very far. Still haven't decided whether or not to convert this lathe,but it is looking more likely as I work my way through some of the issues I already know about. Learning a lot,and I haven't even started
Not sure if that will work as a link,so you might need to google the name. Very helpful. Plan on using two of their 20A drivers coupled to a csmio ipa.Long and the short of it is,that 99v is the maximum you can run as the overvoltage protection will shut the drive down at 101v. Being a local manufacturer does help. Also had a chat to one of the old boys at work. He explained one of the quirks of our power supply grid. Here in the Uk we run 240v ,50hz. Most houses are single phase,the street lights are normally on a different phase,and industrial is three phase. I am pretty rural,down in the South East of England,not far from Rye and Hastings. Two of the phases when measured are over 240v and the third phase is quite along way down. At home it measures out at 248v. At the shop two phases measure out at 248v, with the third being down at 231v. Because of this,the psu outputs about 104v which isn't any good for my needs. Everyday a school day!
So,the plan is to get a 2kva toroidal transformer with two windings of 70v. Run the two windings in parallel to double up the amperage,use a 50A bridge rectifier ,a bleed resistor and a smoothing capacitor. This should result in a voltage between 94-98v, dependant on the capacitor used. Psu will be able to supply 28A which will be more than enough.Not sure about re using the old capacitor,have been told to be wary of big electrolitic capacitors that have stood unused for many years. Apparently they should be reformed with a lower voltage before reuse? So, I might go down the route of using a bank of new,smaller capacitors connected in parallel for the smoothing part of it.
Well, I haven't gotten very far. Still haven't decided whether or not to convert this lathe,but it is looking more likely as I work my way through some of the issues I already know about. Learning a lot,and I haven't even started
