X4 Lathe Canned cycles

[DavidB]

We are seeing some bad toolpaths with X4 and Lathe canned rough cycles.

Internal or external the tool gouges into stock first them moves out then starts its canned roughing cycle.

The bad moves are in the posted code also.

 

We have never had a problem with Lathe Canned Roughing cycles here before only now with X4.

 

Anyone else seeing this?

 

It's just not me our other programmers are having issues too.

 

Thanks Dave

[Bjorn Petersson AME AB]

Hi David,

 

I guess you already made sure the Ref.Point box isn't checked?

[Goldorak]

i found with canned cycle that you must have more stock to remove than the TNR

 

if you trying to remove .03 with a .046insert , it just don't work....

[chris m]

Axela, you are certainly correct with your point, but I have never seen gouging result from this.

 

David, canned cycles by definition can't really gouge the part like you a talking about so you mean that the approach move that posts is bad?

[DavidB]

I have used canned Lathe ROUGH since V9 and I've never had a problem.

We programmers here are seeing very bad moves in X4 with Lathe Canned Rough, not just me but the other 2 programmers aswell.

 

Here are some screen shots of whats happening.

 

Tools rapids outside of the stock all good to this point.

 

Tool moves into stock. BAD!

 

Tool moves away from stock

 

Tool takes first depth of cut in Canned Rough cycle.

 

This into stock position repeats at the end of the toolpath too.

 

Yes I have my geom greater than the tool nose rdius past the stock.

 

At this stage I'm really scratching my head

[DavidB]

Chris its no so much the code between the G81 and G80 it's the approach thats into the stock thats causing grief.

 

 

code:

---

 ( TOOL - 1  OFFSET - 1 )

( LCAN_ROUGH ROUGHER 80 DEGREE INSERT - CNMG 12 04 08-23,H13A )

( ROUGH OD )

N2 G0 X800. Z250.

N3 T0101

N4 G96 S90 M04 M44

N5 G0 X105.115 Z11.652 M08

N6 Z12.039

NAP01 G81

N51 G0 X68.595 Z12.039

N52 G1 Z9.766

N53 G2 X75.362 Z6.604 I3.383 K.229

N54 G1 X88.799

N55 G3 X89.93 Z6.37 K-.8

N56 G1 X94.502 Z4.084

N57 G3 X94.971 Z3.518 I-.566 K-.566

N58 G1 Z-.648

N59 Z-11.849

N60 Z-17.713

N61 X105.115

N62 G80

---

See the approach (Z11.652) it's forward of the canned rough start point (Z12.039)

I've never seen this b4.

 

Dave

[chris m]

That's f-ed up for sure. If you set a reference point in front of the stock, say Z12.039, will it generate the toolpath correctly, or does it still make that crazy move? Not suggesting that is the solution; just curious.

[Goldorak]

Dave, i tried to replicate your problem and for me it works fine without any collision

 

you g-code seems to be for an okuma lathe , i also take an okuma MD and works fine

[DavidB]

I just noticed something else the Canned cycle is adding 50 to the sequence numbers.

Where would this be coming from?

 

Its doing it at N84 and N271

code:

---

 N1 G50 S1600

( TOOL - 1 OFFSET - 1 )

( LFACE ROUGHER 80 DEGREE INSERT - CNMG 12 04 08-23,H13A )

( FACE )

N2 G0 X800. Z250.

N3 T0101

N4 G96 S90 M04 M44

N5 G0 X109.115 Z37.602 M08

N6 G95 G1 X-1.6 F.3

N7 G0 Z38.602

N8 X109.115

N9 Z35.767

N10 G1 X-1.6

N11 G0 Z36.767

N12 X109.115

N13 Z33.932

N14 G1 X-1.6

N15 G0 Z34.932

N16 X109.115

N17 Z32.097

N18 G1 X-1.6

N19 G0 Z33.097

N20 X109.115

N21 Z30.262

N22 G1 X-1.6

N23 G0 Z31.262

N24 X109.115

N25 Z28.427

N26 G1 X-1.6

N27 G0 Z29.427

N28 X109.115

N29 Z28.127

N30 G1 X-1.6

N31 G0 Z29.127

( ROUGH OD )

N32 X105.115

N33 Z29.109

NAP01 G81

N84 G0 X68.595 Z29.109

N85 G1 Z27.741

N86 G2 X75.362 Z24.579 I3.383 K.229

N87 G1 X88.799

N88 G3 X89.93 Z24.345 K-.8

N89 G1 X94.502 Z22.059

N90 G3 X94.971 Z21.493 I-.566 K-.566

N91 G1 Z17.328

N92 Z6.126

N93 Z.262

N94 X105.115

N95 G80

G85 NAP01 D5. U2. W.5 F.3

N109 M09

N110 G0 X800. Z250.

N111 M05

N112 M01

( TOOL - 5 OFFSET - 5 )

( LDRILL NO.3 CENTRE DRILL INSERT - 3.CENTRE DRILL )

( CENTRE DRILL )

N113 G0 X-250. Z250.

N114 T0505

N115 G97 S2000 M03 M44

N116 G0 X0. Z38.127 M08

N117 Z33.127

N118 G95 G1 Z24.627 F.05

N119 G0 Z38.127

N120 M09

N121 G0 X-250. Z250.

N122 M05

N123 M01

( TOOL - 7 OFFSET - 7 )

( LDRILL 1.6INCH DRILL INSERT - 1.6INCH DRILL )

( DRILL 1.6INCH HOLE )

N124 G0 X-250. Z250.

N125 T0707

N126 G97 S630 M03 M44

N127 G0 X0. Z38.127 M08

N128 Z33.127

N129 G95 G1 Z-245.503 F.08

N130 G0 Z38.127

N131 M09

N132 G0 X-250. Z250.

N133 M05

N134 M01

( TOOL - 11 OFFSET - 11 )

( LGROOVE GROOVE TOOL INSERT - A4G0305M03U04GMP KC5025 )

( SEMI GROOVE )

N135 G0 X800. Z250.

N136 T1111

N137 G96 S100 M04 M44

N138 G0 X98.971 Z11.002 M08

N139 G95 G1 X92.284 F.12

N140 G0 X98.971

N141 Z9.214

N142 G1 X92.284

N143 X92.642 Z9.393

N144 G0 X98.971

N145 Z12.79

N146 G1 X92.284

N147 X92.642 Z12.611

N148 G0 X98.971

N149 Z14.425

N150 G1 X92.284

N151 X92.642 Z14.246

N152 G0 X98.971

N153 Z7.579

N154 G1 X92.284

N155 X92.642 Z7.757

N156 G0 X98.971

N157 Z7.426

N158 G1 X95.957

N159 G2 X94.866 Z7.579 I-.545 K-.9

N160 G1 X92.284

N161 X92.642 Z7.757

N162 G0 X98.971

N163 Z14.578

N164 G1 X95.957

N165 G3 X94.866 Z14.425 I-.545 K.9

N166 G1 X92.284

N167 X92.642 Z14.246

N168 G0 X98.971

N169 Z11.002

N170 X94.284

N171 G1 X87.598

N172 G0 X94.284

N173 Z9.214

N174 G1 X87.598

N175 X87.956 Z9.393

N176 G0 X94.284

N177 Z12.79

N178 G1 X87.598

N179 X87.956 Z12.611

N180 G0 X94.284

N181 Z13.425

N182 G1 Z14.425

N183 X87.598

N184 X87.956 Z14.246

N185 G0 X94.284

N186 Z8.579

N187 G1 Z7.579

N188 X87.598

N189 X87.956 Z7.757

N190 G0 X94.284

N191 X100.971

N192 Z14.578

N193 G1 X96.971

N194 X95.957

N195 G3 X94.866 Z14.425 I-.545 K.9

N196 G1 X87.598

N197 Z7.579

N198 X94.866

N199 G3 X95.957 Z7.426 K-1.053

N200 G1 X96.262 Z7.579

N201 G0 X100.971

N202 Z7.426

N203 G1 X96.971

N204 X95.957

N205 G2 X94.866 Z7.579 I-.545 K-.9

N206 G1 X87.598

N207 Z14.425

N208 X94.866

N209 G2 X95.957 Z14.578 K1.052

N210 G1 X96.971

N211 G0 X100.971

N212 M09

N213 G0 X800. Z250.

N214 M05

N215 M01

( TOOL - 10 OFFSET - 10 )

( LCAN_ROUGH 25-BORING BAR INSERT - CNMG 120408 -NR IC9150 )

( ROUGH ID )

N216 G0 X800. Z250.

N217 T1010

N218 G96 S100 M03 M44

N219 G0 X40.64 Z29.377 M08

N220 Z28.959

NAP02 G81

N271 G0 X60.831 Z28.959

N272 G1 X57.364 Z25.957

N273 G2 X57.15 Z25.557 I.693 K-.4

N274 G1 Z22.497

N275 Z20.249

N276 Z15.842

N277 X48.069

N278 G2 X46.469 Z15.041 K-.8

N279 G1 Z9.065

N280 Z7.841

N281 X40.64

N282 G80

G85 NAP02 D3. U3. W.5 F.15

N296 G0 Z29.377

---

I have Sequence numbers set to start = 1, Inc = 1

 

Never had that before either in X3

[chris m]

Now that I am thinking about it a little harder, a few years back I had some crazy canned cycle posting problems on my seat only [we have 4] and it traced back to a corrupted .dll file somewhere in Mastercam.

 

This was my problem, maybe you could check this for possibly causing your problem:

 

Old canned cycle bug thread

[Goldorak]

and one of my post now output weird things since i update it to X4

[DavidB]

Thanks Chris but I'm seeing this on our other seats of X4.

The problem was brought to my attention by another prgrammer here when his Internal Canned Rough program crashed a 25mm boring bar into the stock.

 

I could not see what he was doing wrong and I noticed the same thing in my X4 Canned roughing toolpaths.

 

I also noticed that for some reason the canned cycles add 50 to the line (sequence) numbers, very strange!

 

As I said before I have never had any problems with canned roughing before.

[gcode]

Check Config/Files/Lathe PostProcessor(EXE)

and make sure you are using the correct

MP.DLL

C:McamX4appsMP.dll

not

C:Mcam(X2 or X3) appsMP.dll

 

Its unlikely that this is wrong on all three

of your work stations, but it won't hurt to check

[FP1]

Make sure you have a check mark on extend contour to stock. Make sure you use extend start of contour by .100 or more. I had to to this recently to get things to work properly.

[FP1]

Also be aware that if it is a canned rough face, you may have to extend the start of countour much more than .100. Lets say your stock diameter is a max of 4.0, but your face chain starts at 3.0, then you will need to extend your start of contour (on the lead-in page) by at least .600

[DavidB]

quote:

---

Make sure you have a check mark on extend contour to stock. Make sure you use extend start of contour by .100 or more. I had to to this recently to get things to work properly.

---

Thanks yes I do this.

 

Extending the geom does help but the approach points and retract points are still not ideal.

The tool tool still moves towards stock then away then starts cutting.Extending the geo just makes it saffer.

Something has definatly changed in X4 as X3 gives a much better approach.

 

As for the canned cycle screwing with the sequence numbers does anyone have any ideas, are you guys seeing the sequence number issue (mine adds 50 to the line numbers see above code)?????

 

Like I've said previous to X4 I have NEVER had issues with Lathe Canned Rough cycles, and I have NEVER had to use a ref point for approach or retract.

[Bjorn Petersson AME AB]

Hi David,

 

Make sure the start of your chain doesn't point towards Z-. I can make mine behave like yours if I change the geometry (first entity of chain).

[chris m]

David, sorry I am no help with this beyond what I have already mentioned; I use the Lathe product regularly, but I'm running V9.1SP2.

 

C