Feed Rate Zero

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  • #3525
    jowan512
    Member

    I’m using v7 firmware and can not seem to move / cut using G1 command form a console with out the error:

    <code>#### TRAP #### Attempted move G1Y1 with feed rate = zero</code>

    Below is a dump of the settings for Y axis followed by a simple G1 Y1 command and the error it returns.

    Is there something I have not set ? as clearly in the dump it says feed rate is set to 1000.

    <code>

    tinyg GCODE[mm] ok> $y
    Y axis – Axismode              1 [0-10]        $YMO1
    Y axis – Seek rate           1500 mm/min       $YSR1500
    Y axis – Feed rate           1000 mm/min       $YFR1000
    Y axis – Travel/rev         10.00 mm           $YTR10.00
    Y axis – Travel hard limit    300 mm           $YTH300
    Y axis – Travel soft limit    285 mm           $YTS285
    Y axis – Step angle          1.80 degrees      $YSA1.80
    Y axis – Microsteps             8 [1,2,4,8]    $YMI8
    Y axis – Motor polarity         0 [0,1]        $YPO0
    Y axis – Power mgmt mode        1 [0,1]        $YPW1
    Y axis – Limit switch mode      1 [0,1]        $YLI1
    Y axis – Homing enabled         1 [0,1]        $YHE1
    Y axis – Homing seek rate    1350 mm/min       $YHR1350
    Y axis – Homing close rate     10 mm/min       $YHC10
    Y axis – Homing offset       -150 mm           $YHO-150
    Y axis – Homing backoff         5 mm           $YHB5
    Your Y axis settings translate to:
    Y axis mode: STANDARD
    Y max seek:   500 steps/sec
    Y max feed:   333 steps/sec
    tinyg GCODE[mm] ok> g1 y1
    #### TRAP #### Attempted move G1Y1 with feed rate = zero

    </code>

    what am i missing ?

    G0 / Traverse commands work .

    #3526
    alden
    Member

    When you enter a G1 (or G2 or G3) command it requires an F word (not THAT F word). Examples:

    G1 F400 x10     (or)

    G1 X10 F400

    G0’s do not. The feed rate in the settings is the maximum feed rate that the axis / motors can handle. If you specify an F word faster than the max it will be limited to the max you have set.

    Does this help?

     

    #3528
    jowan512
    Member

    Yep that does it!

    I also see that you only need to set the Feed Rate this way i.e within a G1 command, once.Then you can execute G1 commands omitting the feed rate.

    I simply presumed that setting the Motor Feed Rate using $xfr1000 for example, set the feed rate there and then, like as if it was contained in a G1 command.

    But I see that it is in fact a maximum value parameter, not simply setting the feed rate for the step.

    thanks.

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