heeeeelllllpppp

[djwacko]

i have a lobo close loop amp3 with 2 x g120 and i think he is broken
when i adjust the damping, nothing hapens. when i adjust int. gain, nothing hapens, i have a lot of overshoot and i dont know where to start looking to fix the problem. can someone help me please??????????

in attachement you fnd a picture of the problem with my rampgenerator

please someone help me

[djwacko]

sorry forgot the attachement

[guido]

A Rampgenerator on the Input of an G120 Driver ??
Is there no easyer way to kill G120 ? ? ?

Closed Loop Scanners needs there Input as little Steps, that means, to scan an rectangle you draw this with about 30 single points each side. on every corner you set 3-5 Points ( Direction change )

Adjusting:
Use minimum scanspeed ( about 2-3 K )
Gain and Damping to the minimun and start scanning.

increase gain and adjust damping until you get an god looking output.
increase scanspeed and repeat this until it isnt possible to get a god output.

[djwacko]

obviously the ramp generator on the driver of the g120.
i have tried with speed at minimum, gain at minimmum, damping at minimum,
but when i change damping, then nothing hapens

[guido]

sounds not so good..
i dont know exactly your driver , but adjusting closed loop drivers is near the same.
Now manual work is needed, and an Osziloscope.
Take a look at the Powersupply. is the oszilator inside the g120 working ?

[djwacko]

whel eeuh the problem is, ... i have no scope . i orderd one but he has not arrived yet.

if it's of any use, i have a shematic of the driver