G64 problem

[dcrblazer]

i have a RH30 machine with centurion 6 controls. we have an issue with the machine stopping after every line of code. if we are going to make a straight cut or an arc it is fine and doesnt hurt anything. but when i use a "3d" program or surface cut it stops hundreds of times and slows the machine down and cuts a poor finish on the part. my machineist has told me that he thinks there is a G61 setting in the machine. does anyone know where this might be and what i need to do to turn it off?

[moldcore]

Can you post here a typical program where this is happening? I have a Cent 6 and have not seen this before. G64 is default at startup so there is no need to have this or G61in your program. What program and post are you using for the 3D program?

[dcrblazer]

i use surfcam for my programs. the g64 is not in my programs its in the machine i think(is this right?). i need to know if i can put something in my programs or a setting in the machine that will turn off the hard stops

[dcrblazer]

here is part of a program this is just a piece taken out right after a tool change



G0G28G91Z0
N4T6M6
G0G90G54X0.3555Y1.1146M3S6000
G43Z1.1H6M8
G0Z-1.4984
G1Z-1.5984F10.000
X0.322Y1.1245F31.000
X0.3061Y1.1292
X0.2596Y1.1407
X0.2384Y1.1454
X0.2076Y1.1514
X0.1541Y1.1597
X0.1051Y1.1652
X0.0584Y1.1685
X0.0061Y1.1699
X-0.0497Y1.1689
X-0.0682Y1.1679
X-0.0988Y1.1658
X-0.1544Y1.1597
X-0.1849Y1.1551
X-0.2126Y1.1504
X-0.2524Y1.1424
X-0.3118Y1.1276
X-0.3487Y1.1168
X-0.3968Y1.1006
X-0.4421Y1.0831
X-0.4623Y1.0747
X-0.4915Y1.0617
X-0.5386Y1.0386
X-0.5824Y1.0146
X-0.6075Y0.9998
X-0.6254Y0.9888
X-0.6757Y0.9551
X-0.7082Y0.931

[moldcore]

Your program looks good. I too use Surfcam and the Centurion 5 post (I don’t think they have a Cent. 6 or 7 post offered). I’m not aware of any setting in the control that would override the G64 or G61. Check the “look ahead”, I have mine set at 100. The Cent 6 should be able to handle that. Other than that, I’m at a loss as to why that machine needs to stop so often.

[Chuckie]

Code looks good. Nothing telling the machine to stop. But i do see on your opening (safety Block, I call it) there is a G91 This is Incrimental. Most machines use a G90 there and I have never seen a Z0 in that line either. That's the only thing I can see right off. Your code is a series of very small moves in the X and Y and at 31 IPM it must be jerky...I'm going to process the CNC code here and send it to my sofware and see what it draws.

[Chuckie]

Ok I ran your CNC code Through AlphaCam and it looks like a 1.1688 Radius you are cutting. Even though they are straight line cuts it's going in a circle. Like maybe it is roughing the dia. Just a guess.

[dcrblazer]

the 31 ipm was a type-o i changed it to 310ipm when i put it in the machine.and the line "G0G28G91Z0" is before a tool change so it goes incrimental just to make sure the tool is all the way up in z before it starts the tool change

and the programs are good, it is a setting in the machine that makes a full stop at the end of every move so its like a move,stop,move,stop,move and i would like it to move,move,move if that makes any sense at all

[moldcore]

I missed that first line of code, I don't think it’s needed, the controller should take of that when it sees a tool change command.

Here is a sample of the code I get from my Surfcam on a 3D surface:

O1
G90G80G40G17
T3M6
G0G54X2.2235Y3.1373
M3S7000
G43Z1.H3
M8
G0Z-0.051
G1Z-0.151F10.00
X2.2298Y3.1403Z-0.1503F25.00
X2.2343Y3.1422Z-0.1498
X2.2391Y3.1438Z-0.1493
X2.2432Y3.1447Z-0.149
X2.2449Y3.1433Z-0.1525
X2.2414Y3.1427Z-0.1528
X2.2377Y3.1417Z-0.1531
X2.2331Y3.1401Z-0.1536
X2.2286Y3.1382Z-0.1541
X2.2235Y3.1357Z-0.1547
Y3.134Z-0.1583
X2.2297Y3.1371Z-0.1577
X2.2343Y3.139Z-0.1571
X2.239Y3.1405Z-0.1566
X2.243Y3.1414Z-0.1563
X2.2461Y3.1418Z-0.1561
X2.2474Y3.1403Z-0.1597
and so on...

If you’re feeding at 310 ipm it may be faster than the controller can do but I seriously doubt it. Did you check the block look ahead in the parameters like I suggested? The default on mine was set very low causing the machine to run slow but it never came to a stop between moves that I recall.

I can send you my postform.m file if you want.

[Mortek]

I have had this problem myself before. I solved it by putting in a new hard drive. I was DNCing from it. If you are RS232 feeding then this will also cause stopping if the machine has to wait for code. I didn't see anything in your question that indicated how you were getting the code to the machine.

Ken

[dcrblazer]

thanks for all the help guys. and Moldcore, if you could send that it would be great. i could compare the 2 and se if there is something wrong in mine, ill pm you my email.

THANKS AGAIN!
John

[dcrblazer]

Moldcore reminded me of a few questions i hadnt answers.

i load the program off a disk into the ram of the machine.
i do not rs232 the files
i use run and not dnc

and if i could figure out why i cant load a picture of the part i would show yall the finishes i am getting.


there i figured it out....i think
there may or may not be a jpg attached..