Back or front tool
22 Oct 2021 13:59 #223923
by john11668
Replied by john11668 on topic Back or front tool
Hal and Ini attached
Attachments:
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22 Oct 2021 15:27 #223926
by Aciera
Replied by Aciera on topic Back or front tool
So in order to setup XYZ axis you'll want to change your ini:
[KINS]
JOINTS = 3
KINEMATICS = trivkins coordinates=XYZ
[TRAJ]
COORDINATES = X Y Z
[KINS]
JOINTS = 3
KINEMATICS = trivkins coordinates=XYZ
[TRAJ]
COORDINATES = X Y Z
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22 Oct 2021 16:33 - 22 Oct 2021 16:42 #223930
by dgarrett
Replied by dgarrett on topic Back or front tool
Note:
using:
> KINEMATICS = trivkins cooordinates=XYZ
assigns x==joint0, y==joint1, z==joint2
alternatively, using:
> KINEMATICS = trivkins coordinates=XZY
would assign x==joint0, z==joint1, y==joint2
and could be helpful in updating halfiles since
it would preserve prior joint0,1 connections.
No connections are required for dummy coordinate y==joint2
but a [JOINT_2] stanza with immediate homing is probably
required to use "HomeAll" provisions.
Ref (trivkins):
linuxcnc.org/docs/devel/html/man/man9/kins.9.html
> trivkins - generalized trivial kinematics Joint numbers
> are assigned sequentially according to the axis letters
> specified with the coordinates= parameter.
Ref (immediate homing):
linuxcnc.org/docs/devel/html/config/ini-...ml#_immediate_homing
using:
> KINEMATICS = trivkins cooordinates=XYZ
assigns x==joint0, y==joint1, z==joint2
alternatively, using:
> KINEMATICS = trivkins coordinates=XZY
would assign x==joint0, z==joint1, y==joint2
and could be helpful in updating halfiles since
it would preserve prior joint0,1 connections.
No connections are required for dummy coordinate y==joint2
but a [JOINT_2] stanza with immediate homing is probably
required to use "HomeAll" provisions.
Ref (trivkins):
linuxcnc.org/docs/devel/html/man/man9/kins.9.html
> trivkins - generalized trivial kinematics Joint numbers
> are assigned sequentially according to the axis letters
> specified with the coordinates= parameter.
Ref (immediate homing):
linuxcnc.org/docs/devel/html/config/ini-...ml#_immediate_homing
Last edit: 22 Oct 2021 16:42 by dgarrett.
The following user(s) said Thank You: Aciera
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22 Oct 2021 18:36 #223941
by john11668
Replied by john11668 on topic Back or front tool
Thanks Guys ,
I now have turning on back tool followed by singlepoint threadcutting on front tool.
I homed X, and Z using my hard "home all" button but it did not show as homed until I clicked on the screen home button , then I was able to click on Y home button and it then showed as homed .
The DRO does show an active Y axis too . Can this be inhibited ?
I have to admit I am not quite following the info which your links guide me to Dgarrett
I now have turning on back tool followed by singlepoint threadcutting on front tool.
I homed X, and Z using my hard "home all" button but it did not show as homed until I clicked on the screen home button , then I was able to click on Y home button and it then showed as homed .
The DRO does show an active Y axis too . Can this be inhibited ?
I have to admit I am not quite following the info which your links guide me to Dgarrett
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22 Oct 2021 23:59 #223969
by john11668
Replied by john11668 on topic Back or front tool
Have played a bit with this . . Bit of a voyage of discovery but am delighted it works . Thanks again guys .
Took a bit of getting used to . Had to reset my tool offsets and of course you need to do a G10 roration in MDI, (in order to place the machine in the right mode) before calling your tool change , then setting the offsets . All a bit novel for me but I will get there !
Took a bit of getting used to . Had to reset my tool offsets and of course you need to do a G10 roration in MDI, (in order to place the machine in the right mode) before calling your tool change , then setting the offsets . All a bit novel for me but I will get there !
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23 Oct 2021 23:38 - 23 Oct 2021 23:39 #224044
by john11668
Replied by john11668 on topic Back or front tool
I found that once I had set the offsets, each within its appropriate rotation for front or back, I still had to touch off within each rotation . Seems logical enough but had me wondering initially.
In the tool table there is the option to nominate tools as back or front . Does this have any effect on this process
In the tool table there is the option to nominate tools as back or front . Does this have any effect on this process
Last edit: 23 Oct 2021 23:39 by john11668.
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27 Oct 2021 13:49 #224516
by andypugh
Replied by andypugh on topic Back or front tool
Front and Back in the tool editor are the front and back angles of the insert, so that you can have a representative image in the preview (also, at least some implementations of G71 use the front and back angles to avoid gouging)In the tool table there is the option to nominate tools as back or front . Does this have any effect on this process
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31 Oct 2021 19:05 - 31 Oct 2021 19:07 #224784
by john11668
Replied by john11668 on topic Back or front tool
So hardly going to affect me yet but thanks Andy.
What I am struggling to find though is how to reverse my spindle .
Both M3 and M4 currently send the spindle in the same direction. Its a DC motor so I can reverse by reversing the motor leads anyway
So as my normal operating mode would be back tool (slant bed lathe) I am presuming i would choose CW as M3 direction,
So then I call M4 and I want spindle to run CCW . Bob relay starts my spindle and Bob analogue output regulates my speed, but I need to energise my reversing relay to change direction .
I have a 4 relay additional board so I can choose any one to energise my reversing relay but I just cant find what I need to write into my Hal to make it happen.
I have all the output pins for axes A and B to choose from
My Hal files are at the top of this page so if anyone can guide me I will appreciate this
What I am struggling to find though is how to reverse my spindle .
Both M3 and M4 currently send the spindle in the same direction. Its a DC motor so I can reverse by reversing the motor leads anyway
So as my normal operating mode would be back tool (slant bed lathe) I am presuming i would choose CW as M3 direction,
So then I call M4 and I want spindle to run CCW . Bob relay starts my spindle and Bob analogue output regulates my speed, but I need to energise my reversing relay to change direction .
I have a 4 relay additional board so I can choose any one to energise my reversing relay but I just cant find what I need to write into my Hal to make it happen.
I have all the output pins for axes A and B to choose from
My Hal files are at the top of this page so if anyone can guide me I will appreciate this
Last edit: 31 Oct 2021 19:07 by john11668.
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31 Oct 2021 20:24 #224791
by rider-83
Replied by rider-83 on topic Back or front tool
I have the 160TCL and had the same issue with switching the spindle DC motor direction with M3 & M4. It was easily resolved with a polarity reversing module which I bought from a model railway supplier.
I can have a look at how I did it and send you the .hal example if you are interested?
I can have a look at how I did it and send you the .hal example if you are interested?
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31 Oct 2021 21:30 #224803
by john11668
Replied by john11668 on topic Back or front tool
Thanks Rider and and yes please .
I think I have the kit to actually reverse the polarity . I have been doing it manually with a 2 pole changeover switch and have set up a relay to do the same . I think I just need the hal entries to make a chosen pin operate one of the relays on a small board which in turn will energise my reversing relay,
Still interested to see your setup as well though.
I think I have the kit to actually reverse the polarity . I have been doing it manually with a 2 pole changeover switch and have set up a relay to do the same . I think I just need the hal entries to make a chosen pin operate one of the relays on a small board which in turn will energise my reversing relay,
Still interested to see your setup as well though.
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