You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
use linuxcnc 2.9-pre-0 on uspace.
System Debian 10
-on lathe configuration with x-y-z and 2 spindle , when use X axis for life tool spindle use g19 plane.
the machine have limit on x plus 600mm and x minus -20 mm
The plus position value are up spindle centre , minus position value are down at spindle centre.
Normally we use only diametral mode G7
if stay for example in position x 500 mm in g7 diametral mode and command
m3 s100$1
g19g94g81x400r420 f1000
the linuxcnc return message , max limit plus exceded, max max limit reaaly is 600mm
if command and stay in position x500mm
m3s100$1
g19g94g81x400 r210 f1000 the machine work ok, executer rapit at 420 mm and after executed f1000 at x400 and retur rapid at 420mm.
the r parameter in g19 plane not respect diameter mode g7 , but use position in radial mode
This is valid on all macro cycle in plane g19 .
I have test is on g17 and run good.
The text was updated successfully, but these errors were encountered:
My first thought is that using diameter mode for a canned cycle seems like an odd thing to do. It meant to be the retract distance above the surface in the direction along the cutter axis.
I don't know if most people would expect the retract distance to consider radius/diameter mode in this case.
Would you also expect to consider radius/diameter in the Y axis if using the G18 plane?
I am more inclined to think that it is the X axis calculation that is wrong.
I certainly agree that X and R should match in their behaviour, though.
if you work on a lathe, and work diametrically, the position commands e.g. g1 x60, they will be diametrical, the cnc will move the x axis to a diametrical position of 60, therefore in a macro cycle, the r must respect the same diametrical behavior as the position command.
At the moment when you execute g19 g81 x400 r 210 f100 , the r has a value half of that where the cycle will start and that is 420 .
If in the current state I wrote g19 g81 x400 r420 f100, lxcnc returns
that R is beyond the positive software limit, because it interprets it as R840 and since my limit is 600 mm positive, the problem occurs.
I raise this bug, because on other cncs, the R is concordant with the x in g19, as it is with the z in g17 and with the y in g18
The cycle g17 g81 z400 r420 f100 works correctly, in this plane, the R is greater than Z.
I will test the g18 plan and update you.
I think that the behavior of the g18 and g19 planes if I turn, the R word must be conditioned to the radial or diametric mode.
use linuxcnc 2.9-pre-0 on uspace.
System Debian 10
-on lathe configuration with x-y-z and 2 spindle , when use X axis for life tool spindle use g19 plane.
the machine have limit on x plus 600mm and x minus -20 mm
The plus position value are up spindle centre , minus position value are down at spindle centre.
Normally we use only diametral mode G7
if stay for example in position x 500 mm in g7 diametral mode and command
m3 s100$1
g19g94g81x400r420 f1000
the linuxcnc return message , max limit plus exceded, max max limit reaaly is 600mm
if command and stay in position x500mm
m3s100$1
g19g94g81x400 r210 f1000 the machine work ok, executer rapit at 420 mm and after executed f1000 at x400 and retur rapid at 420mm.
the r parameter in g19 plane not respect diameter mode g7 , but use position in radial mode
This is valid on all macro cycle in plane g19 .
I have test is on g17 and run good.
The text was updated successfully, but these errors were encountered: