fagor 8020tg programming

[Fittingsman]

hi all
further to my other post i am still trying to get my machine to work , here are 2 attempts at programing to get over my problem
n10 g70
n20 g90
n30 g94
n40 g0 x5.000 z5.000
n50 t12.12 (machine stalls at this point & will go no further )
n55 m06
n60 g97 s2000 m3
n70 g0 x.750 z0
n80 g1 x-.075 f50
n90 g0 x.600 z.100
another attempt has been this way , every thing is the same except for a change to line n50
n50 g50 t12 x0.0411 z-0.0032
this code runs but does not use the tool offsets for tool 12 only uses t00 offsets
what am i doing wrong ?
thank you in advance for any help given
robert

[Fagor - Todd]

Originally Posted by Fittingsman hi all further to my other post i am still trying to get my machine to work , here are 2 attempts at programing to get over my problem n10 g70 n20 g90 n30 g94 n40 g0 x5.000 z5.000 n50 t12.12 (machine stalls at this point & will go no further ) n55 m06 n60 g97 s2000 m3 n70 g0 x.750 z0 n80 g1 x-.075 f50 n90 g0 x.600 z.100 another attempt has been this way , every thing is the same except for a change to line n50 n50 g50 t12 x0.0411 z-0.0032 this code runs but does not use the tool offsets for tool 12 only uses t00 offsets what am i doing wrong ? thank you in advance for any help given robert

Your issue is related to parameters......if the CNC is stalling, it is related to that next line of M06....... does your machine have an automatic tool changer ? Tell me more about your machine.

On another note, there is a parameter that states, "Do I use the associated tool offset when a tool is called"..... meaning, when you call T12, it will automatically associate T12 offset values. Otherwise you are just calling T12 tool change positioin.

Tell me more and I will try to help.... who's machine is it ? Also, do you know if there is a subroutine automatically associated with a tool change (M06) ?

Todd

[Fittingsman]

hi fagor -todd
my machine is 'denford easiturn cnc lathe with a fagor 8020tg control' the machine was made 1989 / 1990 only about 2 or 3 of these machines were made with the fagor control.
the machine has servo motors , main spindle motor is 3hp & the machine is 3 phase
415v . i have been in touch with the makers here in the uk but they have on information on this control.
the machine had a barrafauldi 6 station toolpost but i had an accident with it & the chuck so it now needs to go for repair , so to keep the machine running i bought a qctp & holders which i thought would be a case of alter a few parameters & away it would go again
in the manual in m code details the mo6 tool change is not listed could this be why the machine stalls ?
i have no idea if there is subroutine that is for tool changing
thank you for your interest
robert

[Fittingsman]

hi fagor - todd
i have had a look through my insallation & start up manual & can only find parameters that relate to the tool changing
P97 - 6 indicates whether the T function can be executed on jog mode or not
0 = yes
1 = no
P98 - 5 it indicates whether tool offset values are active immediately after a T2.2 has been executed or the execution of an M06 is also necessary
1 = M06 necessary
0 = immediately after T2.2
P106 - defines the number of positions in the machines turret , max progammable value = 99 . for machines without automatic tool changer set this parameter to 99
settings of decoded M functions = for M06 this is all zero's on top row . bottom 1st on left is 1 & last one on right is a 1
yes my machine can work with subroutines but i have no idea how to program one or how it works
robert

[Fagor - Todd]

Hi Robert,

Okay, now that I have more information, I think I know your problem...

Considerign it sounds like you used to have a auto-turret, I suspect you have a stand alone Fagor PLC 64 (Black square PLC) or somebody elses PLC...... What is happening is that upon the T code execution, a T strobe is sent to this stand-alone PLC via BCD..... as soon as the PLC receives this, it then drops out pin # 15 on I/O 1 connector...... which is the Feedhold input.....the CNC is awaiting this to go back high from the PLC, but it will not do this because the Turret is not reporting it is in position.....

There is an easy way to verify this and that is execute the program, when it stalls, go to special modes and then I think it is selection 2 and there should be an input/output screen showing a few rows of 1's and 0's....... in the top line, you have the inputs B and C and D...... D is your emergency input, that should be a 1, I believe B is the Feedhold input, that should be a 1 and I believe C is the remote cycle stop, all 3 should be a 1, meaning their is 24vdc on the inputs.....(I could have B & C switched around, I do not remember which was Feedhold and which was cycle stop)

But, in any regards to get around this problem temporarily, instead of shutting down the PLC...... you can take the I/O 1 connector, which is the only 37 pin connector on the back of the CNC and jumper pin 14 to 15 and 16 and disconnect what was attached to them....... thus in essense, you are jumpering your E-stop string to the Feedhold and cycle stop inputs...... which is a common thing to do on most machines not utilizing seperate remote cycle stop pushbuttons or a feedhold pushbutton.....

It should work find after that with no program stoppage......

I hope this helps !

sincerely,
Todd

[Fittingsman]

hi fagor - todd
thank you for the information , i will have a look at it over this weekend & see if it will work
all the best
robert