FEDRAT - Feedrate

Command caption

How the command appears in the CLData command list:

FEDRAT NM nm, K k, MMPM(315) | MMPR(316)

FEDRAT defines the value and the type of tool feed. The feed value is stored until the next FEDRAT command or RAPID command.

CAM system uses FEDRAT to pass the machining condition code.

Access from sppx

Handler: program Fedrat

Parameter CLD array CLD name Description
nm CLD[1] CLD.NM Feed value.
k CLD[2] CLD.K Feed type (work feed, approach feed, retract feed, transition feed, cut-in feed, etc.).
0 - working,
2 - first pass feed,
4 - engage feed,
8 - retract feed,
16 - plunge feed,
32 - finish pass feed
64 - transition to the next pass,
128 - return feed,
256 - approach feed.
For EDM operation CAM system uses this parameter to pass machining condition code.
MMPM(315)
MMPR(316)		 CLD[3] CLD.MMPM Feedrate units: MMPM(315) – mm per minute, MMPR(316) – mm per revolution

Example (from the Fanuc (30i)_Mill postprocessor):

program Fedrat
  FEED_ = cld[1]   ! filling FEED_ rgister
  if INTERP_ = 0 then INTERP_ = 1   ! G1
  if cld[3]=315 then GFeed = 94
                else GFeed = 95
end

Access from .NET

Handlers:

public override void OnMoveVelocity(ICLDMoveVelocityCommand cmd, CLDArray cld)   // shared velocity handler (FEDRAT and RAPID)
public override void OnFeedrate(ICLDFeedrateCommand cmd, CLDArray cld)   // working feed

Inheritance: ICLDFeedrateCommand : ICLDMoveVelocityCommand : ICLDCommand.

Read the parameters from the strongly-typed cmd object (recommended); the raw cld[i] array (same indices as in sppx) and the named cmd["..."] helpers are available too. The table lists the command's members, including those inherited from its base interfaces; the common ICLDCommand members (navigation, CLD, CLDFile, TechOperation, ...) are described in the CLData access model.

Member Type Description
cmd.IsRapid bool Contains "true" if the command is a RAPID command, otherwise it is "false".
cmd.FeedKind CLDFeedKind The kind of a feed (working, rapid, engage, return, finish etc.).
Possible values:
Working (0) - The feed kind for base working movements.
Rapid (1) - The feed kind of rapid movements.
First (2) - The feed kind for the working movements on a first (roughing) pass.
Engage (4) - The feed kind for the movements entering to the first machining (cutting) point.
Retract (8) - The feed kind for the movements leaving the last machining (cutting) point.
Plunge (16) - The feed kind for the movements that plunge vertically into the machining area.
Finish (32) - The feed kind for the working movements on a last (finishing) pass.
Next (64) - The feed kind for the short link movements.
Return (128) - The feed kind for the movements which take the tool away from the machining site.
Approach (256) - The feed kind for the movements which bring the tool closer to the machining site.
Rapid5D (512) - The feed kind value reserved for an internal use.
TransitionOnSafe (1024) - The feed kind for the movements performed in a safe area.
ApproachFromSafe (2048) - The feed kind for the movements from the safe area to the machining side.
ReturnToSafe (4096) - The feed kind for the movements from the machining side to the safe area.
LongNext (8192) - The feed kind for the long link movements.
ThreadPitch (16384) - The feed kind for the threading movements.
Overload (1073741824) - The feed kind value reserved for an internal use.
cmd.FeedCode int Numerical representation of the "FeedKind" flag, that defines the kind of a feed (working, rapid, engage, return, finish etc.). For a wire EDM case it contains the numerical code of a row in a machining conditions table.
cmd.FeedUnits CLDFeedUnits Units of the feed (mm/min, mm/rev etc.)
Possible values:
MPM (0) - Current linear units (mm or inch) per minute.
MPR (1) - Current linear units (mm or inch) per revolution.
ConditionCode (2) - Numerical code of a row in a machining conditions table (for a wire EDM).
cmd.FeedValue double The value of the feed.

Example - OnMoveVelocity (from the Fanuc (30i)_Mill_DN postprocessor):

public override void OnMoveVelocity(ICLDMoveVelocityCommand cmd, CLDArray cld)
{
    if (cmd.IsRapid) {
        nc.GInterp.v = 0;
    } else {
        if (nc.GInterp == 0)
            nc.GInterp.v = 1;
        nc.F.v = cmd.FeedValue;
        if (cmd.FeedUnits==CLDFeedUnits.MPR) 
            nc.GFeed.v = 95;
        else 
            nc.GFeed.v = 94;
        if (IsFirstFeed) 
        {
            nc.F.Show();
            nc.GFeed.Show();
            IsFirstFeed = false;
        } 
    }
}

See also