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This project landed on my desk yesterday & I haven't done one of these before so I have a couple of questions.
I have 8 GV3000 drives controlling individual motors on a tube mill. They all run at different speeds that gradually increase from #1 to #8 in order to draw the tube down to the proper diameter. The rolls on each motor stand are changed frequently (at least 5 times per week) as the tube size requirements change or as the rolls get worn and have to be replaced. There's no PLC controlling this tube mill - it's all relays. They tried teaching the operators to change the parameters, but that didn't work too well so the electricians have to change the parameters. And no one ever bothered to hook up the manual speed pots either.
So... about 5 years ago, someone bought a Reliance Master Controller, but it was never engineered or installed for many & various reasons. Now management wants it installed this week because the mill is down for other upgrades.
The book says nothing using this with the GV series drives. I'm hoping that's simply because the Master Controller is older than the GV series. It looks to be a big pot that controls the incoming 115VAC to the transformer that steps down & converts the signal to 0-12VDC that is equally distributed to all the drives. Then that signal gets hooked to another pot at each drive to be able to tweak the final setting.
Is anyone else using a master controller? Is there anything else I need to consider before hooking this up?
Thanks in advance!
I have 8 GV3000 drives controlling individual motors on a tube mill. They all run at different speeds that gradually increase from #1 to #8 in order to draw the tube down to the proper diameter. The rolls on each motor stand are changed frequently (at least 5 times per week) as the tube size requirements change or as the rolls get worn and have to be replaced. There's no PLC controlling this tube mill - it's all relays. They tried teaching the operators to change the parameters, but that didn't work too well so the electricians have to change the parameters. And no one ever bothered to hook up the manual speed pots either.
So... about 5 years ago, someone bought a Reliance Master Controller, but it was never engineered or installed for many & various reasons. Now management wants it installed this week because the mill is down for other upgrades.
The book says nothing using this with the GV series drives. I'm hoping that's simply because the Master Controller is older than the GV series. It looks to be a big pot that controls the incoming 115VAC to the transformer that steps down & converts the signal to 0-12VDC that is equally distributed to all the drives. Then that signal gets hooked to another pot at each drive to be able to tweak the final setting.
Is anyone else using a master controller? Is there anything else I need to consider before hooking this up?
Thanks in advance!