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Thank you guys for the ideas and words Keith, Ok, today i just went ther with some .1 and .01 mfd tantalum capacitors, and started to filter the signal at the velocity control terminals, what we found was a more stabilized speed, but not as steady as from keypad, but the improvement was...

Hi Guys Just to up date you: On the first today test with the strobo gun, no changes, and a cooler day, it was about 80 F in town (normally is above 95 F) the two systems look fine, so i was directed to think about the motor temperature issue. But 30 mins later, the failure started show, and...

sorry Curt, I was following so close what you said, that I forgot to mention correctly, "I hope the cause are not about the two system loops, trying to adjust speed simultaniously.", It was an amazing explanation amigo! Thanks again Roberto

Just Amazin!!, yes Keith, i now know why you said so. Ok, I got your point about those two systems, it sounds so posible. Actually I really hope it is not the cause, since as i explained above in my very first post here, the integrator/designer guy left the company who sold the machine, and it...

Ok, Sir, will mess in this order, any other idea, will be welcome thank you Roberto

Thank you for all the recomendations, we had problems with the stroboscopic gun (it wasnt ours, it was rented), but we will have a new strobo gun tomorrow, and follow the ideas above described, and let you all know, i.e. setting the keyboard as the control input, and run the motor autotune...

Yes they are toothed Sed.

Ok, Sed2, will try on monday and let you know Thank you Roberto

HI, thank you for asking It consist of two VDF-MOtor-Encoder systems, One is 15 HP and the other 5 HP. Each systems drives thru a pulley-belt one of two diferent sets of circular forming dies (thru its respective 5:1 speed reducer), where a copper tube is getting formed, The 5hp...

Thanks Keith, You are right, the encoder is on the motor, i haven't take the back guard off yet, but the encoder cable goes there. (I thought to disasemble it and verify a slipery coupling, isoating, etc...perhaps later) Regarding your recomendation, it says on the Baldor's manual for this...

HI, thanks for this helpfull forum I'm asking for your help to solve this aparent problem we have on a brand new mill tube forming machine, the man who originaly designeed the electric part, just left, living us to solve any further problem, besides that i really like the chalenge and do have...