[zman300]

New guy here.
Have been running cnc vertical lathes with the 18-T control for many years.
Very good control

Just got in a new vertical lathe with the 32i control. They are so much different than the 18-T.

An example.
When setting tools in the geometry offsets.

On the 18-T machine the X offset for a boring bar is -31.000.
With the same bar in the 32i machine the X offset is -.75.
I want to know .75 from where.
The person doing the training couldn't tell me.
That .75 makes no sense, to me anyway.
Is this the way this control works or can parameters be changed to make it measure offsets like the 18-T.
Can anyone tell me.
Thanks!!

[underthetire]

Check your fixture offsets.

[dcoupar]

When you "home" your old machine, it probably shows zero for the X and Z machine position. Your new machine probably has some pretty big numbers in the X and Z machine position at home. The new one can be changed, I'm sure, to more closely match the old machine.

If you look at parameter #1240 on the old machine it probably has 0 for X and Z. When you home the machine it sets the machine position to these values.

Now compare the values in parameter #1240 on the new machine. You'll see a metric equivalent of the values displayed for machine zero.

If you've never changed parameters before, I'd call the "person doing the training" (if the machine is new, they should make it work like the old one for you).

[zman300]

Fixture offsets?

Check your fixture offsets.

[zman300]

That appears to be it.
The new machine is X1099.82, Z985.52
We are used to the old machine. Easier on the operator if they all work the same.
Which way do you prefer.
Thanks

When you "home" your old machine, it probably shows zero for the X and Z machine position. Your new machine probably has some pretty big numbers in the X and Z machine position at home. The new one can be changed, I'm sure, to more closely match the old machine.

If you look at parameter #1240 on the old machine it probably has 0 for X and Z. When you home the machine it sets the machine position to these values.

Now compare the values in parameter #1240 on the new machine. You'll see a metric equivalent of the values displayed for machine zero.

If you've never changed parameters before, I'd call the "person doing the training" (if the machine is new, they should make it work like the old one for you).

[dcoupar]

My guess would be you're not using G54 thru G59 for "fixture offsets". Most lathes only use them for adjusting the Z work offset (or shift). Did you check parameter #1240 yet? --- oops you must have been typing at the same time I was.

All of the machines I've set up over the past 5 years were like your new machine, so that's what I'm used to. But it's your machine, and you should have it work the way you want it. Is this a new machine?

[zman300]

No don't use the G54-G59 on the lathes, only on the machining centers.
I wasn't thinking machining center so the fixture offsets threw me.
Now it make sense.

Yes it's a new machine, Doosan VT1100.
The old machines are a 99 Doosan V850, 96 Okuma & Howa V80R.
Both are good machines.

We do mostly vertical turning. I grew up on Bullard manual VTL's.

Thanks for your help.

[dcoupar]

I would contact your dealer and ask them to change this for you. I know on every Doosan I install, I make sure the customer doesn't have to change the way they work. It's a simple change, and they should do it for you.

[zman300]

The dealer is working on it, no luck yet.
It's more of a job than I or they thought it would be.
It appears what has to be changed is password protected.

[sinha_nsit]

On the work coordinate screen, do you see zeroes as EXT Offset values?

You should select the same coordinate values at reference position (parameter 1240). These are in least input increments, e.g. 450000 for 450 mm.

[zman300]

I'm told parameter D2100 has to be changed but the control won't allow access.
Any ideas on how to access this parameter.

[fanuc-support.c]

Check the values in parameter 5015 to 5019. Compare to the old machine.

This might be it.

[zman300]

They are the same.

Check the values in parameter 5015 to 5019. Compare to the old machine.

This might be it.

[MysticMonkey]

This is quite a big job if you have not done it before

I expect you will need to change in (metric)

P1240 to the new absolute home position coordinates
P1250 to the new machine home position coordinates
(did I get this the right way round ?)
P1320 to the new software limits +
P1321 to the new software Limits -
1815-1818 to reset your tool measurement sensor
if you have absolute encoders you will need to teach the lathe new home positions.

also P6930 - 6945 & P6950 - 6965 might also need altering

[sinha_nsit]

P1240 to the new absolute home position coordinates
P1250 to the new machine home position coordinates

What is the difference between these two parameters?
0i does not define 1250. There might be some other parameter corresponding to this. Any idea?

[zman300]

Yes it is. Even a bigger job than the dealer thought it would be.
We changed 1240, 1250, 1320, 1321 but not the others.
I'll take a look at those.
The dealer also talked of changing D2100.
Thanks

This is quite a big job if you have not done it before

I expect you will need to change in (metric)

P1240 to the new absolute home position coordinates
P1250 to the new machine home position coordinates
(did I get this the right way round ?)
P1320 to the new software limits +
P1321 to the new software Limits -
1815-1818 to reset your tool measurement sensor
if you have absolute encoders you will need to teach the lathe new home positions.

also P6930 - 6945 & P6950 - 6965 might also need altering