sheetcam/linuxcnc drill and spot op's

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cdedwards
Posts: 13
Joined: Tue Dec 31, 2019 2:05 am

sheetcam/linuxcnc drill and spot op's

Post by cdedwards »

Couple of things. I'm using the latest linuxcnc with QTPlasma along with Phil's linuxcnc plasma post ver G

This started when I attempted to use a "Center Spot" to spot a bunch of holes on a piece. What I found is that it would spot all the holes and then fail everytime at a certain gcode line. As you can see, spotting op #29 is fine M3 $2 S1 to turn on the torch and then a M5 $2 to turn if off. In Spotting op #30 though, things go awry. The M3 $2 spots the hole, and then since this is the last spotting op, it changes Material which resets the type of op, and then we have the M5 $0. This causes the G0 line to fail. Actually my torch goes up and down like a yo-yo spotting that one location over and over until I Cycle stop. Basically that Material Setup is in the wrong location and should be AFTER the M5 which would then have the correct M5 $2.

Code: Select all

N03520 ;begin operation #29, spotting
N03530  G0 X4.53877 Y1.83810
N03540  M65P2 (THC On)
N03550  M3 $2 S1 (spot start)
N03560  G91 (relative distance mode)
N03570  G1 X0.00000004 (tiny move)
N03580  G90 (absolute distance mode)
N03590  M64P2 (THC Off)
N03600  M65P2 (THC On)
N03610  M5 $2(spot stop)
N03620 ;end operation #29, spotting
N03630 ;
N03640 ;begin operation #30, spotting
N03650  G0 X5.77571 Y0.33994
N03660  M65P2 (THC On)
N03670  M3 $2 S1 (spot start)
N03680  G91 (relative distance mode)
N03690  G1 X0.00000004 (tiny move)
N03700  G90 (absolute distance mode)
N03710  M64P2 (THC Off)
N03720  M65P2 (THC On)
N03730 ;
N03740 ;begin material setup
N03750  M190 P23 (45 amp 14ga mild steel material)
N03760  M66 P3 L3 Q2 (wait for valid change)
N03770  F#<_hal[plasmac.cut-feed-rate]>
N03780 ;end material setup
N03790  M5 $0(cut stop)
N03800 ;end operation #30, cutting
N03810  M65P2 (THC On)
N03820 ;
N03830 ;begin operation #31, cutting, 1.34"
N03840  G0 X2.76051 Y3.80271
N03850  M65P2 (THC On)
N03860  M3 $0 S1 (cut start)


I've edited this post to remove the second part involving a drilling op. Phil pointed out where I was wrong on the setup of the drilling op. I've left the first part as I believe this is an error to setup a material before finishing the last op has finished (#30)

Any update on the linux sheetcam version?
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Les Newell
Site Admin
Posts: 3661
Joined: Thu May 11, 2006 8:12 pm

Re: sheetcam/linuxcnc drill and spot op's

Post by Les Newell »

There are a few issues with that post when it comes to spotting. I'd suggest using the post I wrote here https://forum.linuxcnc.org/plasmac/4237 ... e?start=40
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