[nate]

I have BCVer25 running a lathe controlled by mach 3. most things are working fine, but the G76 outputs from the BCVer25 PP are totally wacked out.

Anyone have a text file of their PP for mach 3 that have good G76 output?

I would really appreciate the help.

Nate.

[fidia]

Not been able to successfully get G76 or G96 working from BobCAM V4. I believe G96 does not work in Mach 3. Not sure about G76 but if you want I can send you my edited lathe post processor to try?

[The Engine Guy]

I have BCVer25 running a lathe controlled by mach 3. most things are working fine, but the G76 outputs from the BCVer25 PP are totally wacked out.

Anyone have a text file of their PP for mach 3 that have good G76 output?

I would really appreciate the help.

Nate.

Nate

Lot depends on which version of Mach3 you are using and there is some setting up to do, personally I just use the good old "simple threading" G32 method but if you want some brain pain then have a look at this PDF file for all the answers to G76 threading on Mach3

http://www.micro-machine-shop.com/Mach3%20Threading.pdf

I`m afraid it is a matter of finding out the correct G76 configuration for your version of Mach3 and then it should be fairly easy to mod a PP up to suit

P.S. The line in the PP that sets the G76 config is Line 87, see below :-

87. Start of thread (G76) cycle
n,"G76",thread_x2,thread_z2,thread_lead,thread_fir st_cut,thread_angle_in,profile_start_x,profile_sta rt_z,rough_retract_amount,thread_last_cut

Regards
Rob
:rainfro: :rainfro: :rainfro:

[Hood]

G76 works great for me, I altered the PP to suit but as I use metric it may need modified further if you use Imperial units.
Anyway looking back at a V25 post I have I see I altered 2 entries, first is line 87 and second is I made a programme block, I used Programme Block 5 (line 2005 in PP) as I already had 1 to 4 used for other things.
Here is what I had.

87. Start of thread (G76) cycle
n,"M49"
n,"G76","X",program_block_5,thread_z2,thread_lead, thread_first_cut,thread_angle_in,rough_retract_amo unt,thread_last_cut
n,"M48"


And

2005. Program Block 5.
StartX = LATHE_Getprofilestartx()
Pitch = LATHE_GetThreadLead()
EndX = LATHE_GetThreadX2()

If EndX < StartX then
height=(StartX*2)-(Pitch*1.226)
Else
height=(StartX*2) +(Pitch*1.17)
End If

height = FormatNumber(height ,3)
LATHE_SetReturnString(height)


Hood