need to avoid " chuck clamp confirmation "

[deadlykitten]

Hy guys, about lb3000ex2 lathes

1) i need to use the S axis with low hidraulic pressure, below 0.5 mpa. Problem is that machine does not start, because it thinks that the chuck is unclamp. In reality, the chuck is clamped, but the machine does not receive confimation below 0.5 mpa.

2) i need to use C+M axis without hidraulic pressure.

of course, i can do both things using normal pressure, but it would take longer ...



meow-meow the world kindly !

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[deadlykitten]

Add extra IO to sensor with a manual switch ?
Then use it to cheat the machine.

i didn't understand what you mean ... please, can you be more explanatory ?

) yup, safety comes 1st

[deadlykitten]

hy all, thx 4 answers

1) low hidraulic pressure

i did not mess up with the sensors, because i don't know how ..

M185/M184 does nothing : when compiler reaches this line, machine stops without error - so, it does something,but it does not work

I used a reamer ( static part + rotating tool ) to calibrate a hole, but chuck pressure, even at 0.5mpa, is too big. Control caliber does not fit when part is on the machine, but it fits when part is taken out
Jaws stamp is good ...
Well, sometimes is tricky to use drills and after that reamers, when holes are long and walls are thin, because reamer gets strangled by hidraulic.
Same tools worked nice on a classical lathe ...
If i just could set the hidraulic pressure right.
Anyway, i use a knife instead, and it worked.
* knives : speed
* reamers : cilindricity
In this case i used a knife because hole was not so long; reamers are more suitable for long holes than knives.
When holes are long, and jaws are clamping them, things get ... meow-meow


2) no pressure at all


I needed to mill the jaws, so after that to clamp and turn them ... so, i send them to a mill, or i improvise some kind of a clamp

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Well, beside those sensors, is there a way to avoid hidraulic pressure confirmation ?


kindly !

[deadlykitten]

On a CE machine the pressue switch needs to be confirmed for the machine to run. You could put the machine in "adjust mode" and over ride the PLC input for the pressue switch, but this is not recommended as a solution

sounds nice ... do you think i can do that ? ... do you have a manual 4 that ? i am not a PLCguy

[deadlykitten]

hi nicu, there should be 2 proximity senzors; screwdriver / allen & next table / kindly

    chuck                 |         senzor
    set for od clamping   |   left   right    (*1)


    open                  :     o             (*2)
    closed on part        :     o      o
    closed without part   :            o      (*3)


(
  *1 : looking from the back of the machine
  *2 : " o " means " ligths on "
  *3 : normally, in this case, you should receive an error
)

[deadlykitten]

Simply put, you can only have one ON at a time

hy mr wizard when chucking, both lights are on

empty ( or chuck grasp ilk cancel ) & empty miss clamped : only one / kindly

On a CE machine the pressue switch needs to be confirmed for the machine to run. You could put the machine in "adjust mode" and over ride the PLC input for the pressue switch, but this is not recommended as a solution ...

because it may mess up the bearings inside the hydra cilinder

[deadlykitten]

Changing to air chuck will ignore switches in favor of timer for clamp unclamp

hy mr wizard, so far i did not seen an air chuck at work; i was believing that there is also a pressure confirmation ... time delay is ok, but a low air pressure ( accidentaly ) may ruin the setup; or maybe there are some pressure senzors, at least before the air gets inside the machine ... i would be more comfortable knowing that also the pressure inside the chuck is monitorized

[deadlykitten]

I don’t believe that the air pressure is monitored by pressure switch.

hello, i was looking through special functions, when i found something designed for monitoring air : i don't know if it checks pressure value/range, or only pressure presence, but maybe there is an adjuting valve ? also, i found a parameter for the alarm type; pls check attached

it may be a good idea to monitor air pressure for an air chuck, so to avoid " system fly by "

recently we used diy air for a setup, so to blow the chips away / kindly