barfeed problem

HI im new to mazak machines my workplace just bought a new mazak quickturn 200 II lathe with a multifeed barfeeder.

Tonights the first time ive used the barfeeder,im familiar with barfeeders on other types of machine but this ones not playing ball.

When the lathe gets the end of bar signal it jumps into the 9999 program but instead of spitting out the billet and loading a new bar it alarms out with ,250 spindle alarm.

This is the 9999 prog

g18
m05
207
48
206
g98
69
49
68
207

return

Does push switch or component switch mean anything to anyone? like i said im new to mazaks but i think this may be the problem



Any help would be great thanks

There's two possibilities:

They both involve PLC parameters, so you have to find those in your books. PLC parameters are usually in the elec diagrams books kept in the control cabinet.

First - your machine is set to use the conf switches at the end of the actuator and they are adjusted wrong. You can adjust correctly or else switch from switch conf to timer conf by PLC para,

Second - There is a PLC para that allows the chuck to be open or closed by program code in the first place! This para set wrong will give you the alarm you mention.

RB01.0 = timer/sensor
RB01.1 = M206/207 on or off

for a i150 type little bitty 2 axis. check your own PLC books.

-jim

What is alarm 250? I think it's chuck/unchuck mis-op. If it is, there should be 2 prox switches on the back of the actuator, barfeeder side of machine. They need to be set correctly to signal chuck open/close signal to barfeeder before it will push the remnent out. Please check.

Thanks,

i will try out these suggestions when im back in on monday night and let you know how i get on.

Alarm 250 covers a lot of things. one other way to generate it is to hit the chuck open foot pedal in cycle.

cycle start with the chuck open will also do it.

and, believe it or not, if you hand spin the chuck greater than 50 rpm on a matrix lathe, you'll get this alarm plus e-stop that requires a re-boot to clear!

i'm not sure if you really do get alarm 250, but you get two or three when you spin the chuck fast by hand.

-jim

Jim, I disagree with you on the point that you can generate alarm 250 by depressing the foot switch in cycle. The nature of the footswitch is to only operate in a manual mode. If it generates alarm in cycle, there is someting wrong with the PLC. I'll check on INTE300 tommorow. Thanks.

kennyp, first of all, you have to check if the sensors are working. Open your electrical wiring diagram and point to at end of the spindle. If i remember the input signals are following:

-SQ53(chuck close) is input signal X094(check bit4 if it's ON when you close the chuck)
-SQ52(chuck open) is input signal X093(check bit3 if it's ON when you open the chuck)

For example, abnormality in this case should be that both bits(4 and 3) of input signal X09 are ON or OFF.

Btw, you can check input and output signals in diagnosis monitor(1×left key > diagnosis>version>diagnosis monitor) and then you will input X094 and x093 to check the input signals.

btw, plc alarm 250, you can get in a lot of cases not just because the chuck was open...
For example: You could get it if you are milling something or turning, and if there is not enough pressure at jaws. You have to adjust the pressure to higher value.

My advice is, check if the spindle is orient(M19) before you get 250?

MM

Mazak123 - you could be correct. I am far from infallible!

I've always been confused on setting the chuck open close conf switches. It isn't as easy as you'd think!

jim

jimscnc, no problem....I have a hand-writen procedure I could fax to you, or anyone else that wants it. To all, ALL barfeeders should be using the 2 clamp confirmation switches on the rear of the actuator. There is a parameter the tells the machine if it uses these. For a quick fix, you can turn them off, revealing if they are causing 250 alarm. I think it's RB1, bit 3, but confirm in electrical book. Thanks.

I might be miles off the mark here , don't you have to switch the bar feeder on once in cycle, if I remember go to the machine button, select set up and press bar feed mode on

Yes, you have to tell the machine to look for barfeed signals before you run a program.

kennyp;

did you solve your problem or not?

MM

kenny, please reply to MikiMajk and all of us. That's why we are here. And don't worry if it's something simple, or what you may deem a stupid mistake, we all make them, so just let us know your machine is OK or not. We are here to learn, and help! Best regards, Mazak123

The barfeed is switched on and is working fine once a bar is manually loaded,theres no problems running a bar,during cycle the stop comes down the barfeed pushes the bar and so on till the machine gets the end of bar signal and jumps into the 9999 program,this is when it cuts out with the 250 alarm.

Ive checked RB01.1 its set to timer and RB01.2 is on.

When the program 9999(cuts out) finishes, insert M-Code unit M5(main spindle stop). If it still don't work, delete M5 and insert M500(interlock of Chuck open during rotation) and then report if it's working or not.
One more question, when you get alarm 250 SPINDLE START MISOPERATION, did you get at the begining of your main program, or you are still in 9999 program?(at position menu, check upper right corrner what is the number of the program that is active) This is important.
Because, if after inserting the M500, you still get the 250 alarm, you need to add M500 at the beginning of the main program and then test.

MM