Mitsu M50 canned cycle problems.

[Chuck Reamer]

I recently bought a used Daewoo Lynx 200. After cleaning it up and getting most of my tools together I was ready to try it out.

Today I wrote a g-code program for a simple part I have to make. I have not done any lathe programming in over a year so I am a little bit rusty at it. It is on a Mitsubishi Melendez 50 controller, I have never used a Mitsu either.

The canned cycles were a little different than I was used to, but I had all the controller and programming manuals to read through. I was ready to test it out just running air when I ran into some problems.

1) It seems to run in one block at a time, and single block is turned off. (Is this because the door is opened?)

2) There is a programming alarm that I can’t rectify, I looked at some on the programs that had been left on the machine but none of them use and canned cycles.

Here is the first part of the program where I ran into some problems:

G54
G50s2000t0101
G96s800m3
M8
G00z.015x1.35
G72d.03r.03
G72p001q002f.012s800
N001g1z0.0
N002x-.0312
G80
z.02x1.3


When I got to the fifth line I got the alarm P170 when I looked it up in the manual here is what it reads:

NO CORR. NO.
The compensation number (D00, T00) command was not given when the cutter compensation (g41, G42, G43, G46) command was issued. Alternatively, the compensation number is larger than the number of sets in the specification.

The suggested remedy is:
-Add the compensation number command to the compensation command block.
-check the number of compensation number sets and correct it to a compensations number command within the permitted number of compensations sets.

I am not sure if this controller automatically does the cutter comp or not? If any one knows for sure I would appreciate the help.

[HuFlungDung]

I'm not an expert on lathe canned cycles, but I do have the book here The alarm you get might just be a generic alarm of some sort.

Your first G72 line calls an address 'd' which should be a "W" for cut amount.

If you want to leave a finish amount, you'll also need a U or W amount in the second G72 line.

[Chuck Reamer]

Thanks HuFlung, you were right about the W.

After about 10 hours of playing around I got my first part. Not that bad for saying I havnt done any lathe programming in about 16 months and never even seen a Mitsu controller before.

It seems like a simple task but I am one happy little fellow.