Twin turret lathe configuration
08 Nov 2017 11:25 #101518
by smalla
Twin turret lathe configuration was created by smalla
Hi,
it is possible to set up a dual turret lathe for linuxcnc?
They should both move independently, with their own tools and zero points.
I read somewhere that it needs to involve two separate machines, and need to sync the moves somehow.
there is a link herehere in case studies, but the link is broken:
Should I use XZ UW axes for the two turrets? is it possible? so G1 X10Z10 U10W10 would work ?
Anyone knows how to do it, or got some tips how should I begin developing it ?
Thanks
it is possible to set up a dual turret lathe for linuxcnc?
They should both move independently, with their own tools and zero points.
I read somewhere that it needs to involve two separate machines, and need to sync the moves somehow.
there is a link herehere in case studies, but the link is broken:
Should I use XZ UW axes for the two turrets? is it possible? so G1 X10Z10 U10W10 would work ?
Anyone knows how to do it, or got some tips how should I begin developing it ?
Thanks
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08 Nov 2017 16:46 #101526
by andypugh
Replied by andypugh on topic Twin turret lathe configuration
This should be possible, but in your G-code line above each axis move would finish at the same time. Your example is fine, but if the distances moved were different then the feed rates would be different.
You can, in theory, make things work by splitting moves up. So if you wanted to move Z to 100 while U was moving to 50 followed by a W move to 50 you would not use
G1 Z100 U50
G1 W50
You would, instead, use:
G1 Z50 U50
G1 Z100 W50
You can, in theory, make things work by splitting moves up. So if you wanted to move Z to 100 while U was moving to 50 followed by a W move to 50 you would not use
G1 Z100 U50
G1 W50
You would, instead, use:
G1 Z50 U50
G1 Z100 W50
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08 Nov 2017 17:03 #101527
by smalla
Replied by smalla on topic Twin turret lathe configuration
Ok, I understand that.
But how can program two different tools? They both would have different compensation.
Can I program somehow the use of two tools for different axes?
Or I need to set up the tool table, single tool number, but compensation on four columns, xzuw?
Or what would be the best approach?
But how can program two different tools? They both would have different compensation.
Can I program somehow the use of two tools for different axes?
Or I need to set up the tool table, single tool number, but compensation on four columns, xzuw?
Or what would be the best approach?
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08 Nov 2017 22:11 - 08 Nov 2017 22:12 #101532
by andypugh
I think that you would have to set up one turret with offsets in XZ and one with offsets in UW. You could then do something involving G43.2 to add the offsets together.
Replied by andypugh on topic Twin turret lathe configuration
Ok, I understand that.
But how can program two different tools? They both would have different compensation.
I think that you would have to set up one turret with offsets in XZ and one with offsets in UW. You could then do something involving G43.2 to add the offsets together.
Last edit: 08 Nov 2017 22:12 by andypugh. Reason: I got my G43 codes wrong.
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09 Nov 2017 11:04 #101543
by VNR
With just one controller, you have a G code for two independent turrets. In that case, you have to write two programs and then split and convine the G codes, which can be a nightmare and the result may not be optimal.
Replied by VNR on topic Twin turret lathe configuration
Industrial machines have two CNC controllers because they use two independent G codes.I read somewhere that it needs to involve two separate machines, and need to sync the moves somehow.
With just one controller, you have a G code for two independent turrets. In that case, you have to write two programs and then split and convine the G codes, which can be a nightmare and the result may not be optimal.
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10 Nov 2017 11:35 #101595
by smalla
Replied by smalla on topic Twin turret lathe configuration
So G43.2 can be used If Im not mistaken.
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10 Nov 2017 11:43 #101597
by smalla
Replied by smalla on topic Twin turret lathe configuration
Actually this machine will do the very same movement in a mirrored fashion on the Z W axes. But will use two tools so need to set up two compensation points.
So im thinking on writing a wrapper, which will simply negate the W axis, but it might not be hard to copy the XZ Params and turn them into X->U -- Z->(-W)
So im thinking on writing a wrapper, which will simply negate the W axis, but it might not be hard to copy the XZ Params and turn them into X->U -- Z->(-W)
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10 Nov 2017 13:32 #101600
by Todd Zuercher
Replied by Todd Zuercher on topic Twin turret lathe configuration
The tool offset table in Linuxcnc has separate columns for each axis. So if you are always using the same pairs of tools together then you can simply have the Z offset in the Z column and the W offset in the W column. (If tool 3 in the Z is always used with tool 3 in the W.) If the pairs of tools are not always the same then you will need to use a separate tool position for each, one tool with the Z offset in the Z column (and no W) and the other tool with the W (in the W column but no Z), then add the two tool offsets using G43.2. The same for X and U if needed.
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12 Nov 2017 11:06 #101685
by andypugh
Is this a railway wheel lathe as was discussed a while ago?
forum.linuxcnc.org/10-advanced-configura...-parallel-axis#73835
Replied by andypugh on topic Twin turret lathe configuration
Actually this machine will do the very same movement in a mirrored fashion on the Z W axes.
Is this a railway wheel lathe as was discussed a while ago?
forum.linuxcnc.org/10-advanced-configura...-parallel-axis#73835
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14 Nov 2017 07:04 #101761
by smalla
Replied by smalla on topic Twin turret lathe configuration
Yes, it is a railway wheel lathe. Just didn't know how it is called, and approached the problem on a more generic way.
Thanks for the link, I will read it out.
Thanks for the link, I will read it out.
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