4 Axis CNC MIG welding, weavy stuff problem
31 May 2023 15:39 #272578
by tommylight
4 Axis CNC MIG welding, weavy stuff problem was created by tommylight
I have cobbled together a 4 axis cnc, the XYZC variant (pictures and videos later), with the hope of using siggen and external offsets to do the weaving required during welding, but bumped into some hidden solutions that i can not find, like:
-weaving should be active only while M3 is active
-weaving on a single axis = easy
-weaving on multiple axis = no idea
-weaving on any/multiple axis must be controlled by the angle the torch is turned and based on the direction of travel for G1 only
-Weaving amplitude should be +-2mm for now, frequency is also low at probably 0.5-2Hz
Will add more as i stumble ... hmm progress!
-weaving should be active only while M3 is active
-weaving on a single axis = easy
-weaving on multiple axis = no idea
-weaving on any/multiple axis must be controlled by the angle the torch is turned and based on the direction of travel for G1 only
-Weaving amplitude should be +-2mm for now, frequency is also low at probably 0.5-2Hz
Will add more as i stumble ... hmm progress!
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31 May 2023 19:07 #272599
by tommylight
Replied by tommylight on topic 4 Axis CNC MIG welding, weavy stuff problem
Nice ideas, thank you.
Will have another run through later, need some rest as i was in the hospital with my mom last night, and building a machine with 4 axis in 5 days took it's tool on the gray matter, had to use whatever i could find in the shop, done 4 versions of the C axis and roughly 9 versions of the Z axis, mainly as that C axis is mounted on the Z and needed at least 270 degree motion. Got 300, only limited by weldrers cable, otherwise infinite rotation. Also, needed to hide as much as possible from dust, no one cleans machines aroud here and maintenance is non existant.
All the time thinking of how to go about making it easy for use, not for me, so anything complicated does not go here, lazy people.
Will have another run through later, need some rest as i was in the hospital with my mom last night, and building a machine with 4 axis in 5 days took it's tool on the gray matter, had to use whatever i could find in the shop, done 4 versions of the C axis and roughly 9 versions of the Z axis, mainly as that C axis is mounted on the Z and needed at least 270 degree motion. Got 300, only limited by weldrers cable, otherwise infinite rotation.
Also, needed to hide as much as possible from dust, no one cleans machines aroud here and maintenance is non existant.All the time thinking of how to go about making it easy for use, not for me, so anything complicated does not go here, lazy people.
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01 Jun 2023 08:41 - 01 Jun 2023 09:26 #272631
by Aciera
Replied by Aciera on topic 4 Axis CNC MIG welding, weavy stuff problem
I played a bit with getting a 2D weave:
Does not look too bad for continuous paths. But as usual the problems hide in the details.
[edit]
One problem is to reset the siggen at the right moment to get the weave centered over the tool path. This also needs to be done in corners. Just resetting the offset to zero might cause joint following errors on closed loop machines.
Does not look too bad for continuous paths. But as usual the problems hide in the details.
[edit]
One problem is to reset the siggen at the right moment to get the weave centered over the tool path. This also needs to be done in corners. Just resetting the offset to zero might cause joint following errors on closed loop machines.
Attachments:
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01 Jun 2023 15:31 #272639
by tommylight
Replied by tommylight on topic 4 Axis CNC MIG welding, weavy stuff problem
How?
Another simplification to the issue you mentioned, the welds are always in a straight line on one or both planes, so doing start/stop for each line is also usable. Would also make positioning and rotation on corners easier as the torch can be moved away since the welder would be off.
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As a side note, i am also building other machines for doing the same thing, currently for doing two welds at the same time on just one plane. Does require more user work to rotate the part, but easier to program and use.
I have a very short time period for this, so the race is on full speed to come up with something useful.
In short, one of the parts is made out of two U shapes to form a square, so there are 8 welds on each square, all straight lines. The other part is simpler as it has a single weld along X and another along Y, but does require rotating the torch to get to the corners.
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Sorry for the missing pictures. Shame on me.
Another simplification to the issue you mentioned, the welds are always in a straight line on one or both planes, so doing start/stop for each line is also usable. Would also make positioning and rotation on corners easier as the torch can be moved away since the welder would be off.
-
As a side note, i am also building other machines for doing the same thing, currently for doing two welds at the same time on just one plane. Does require more user work to rotate the part, but easier to program and use.
I have a very short time period for this, so the race is on full speed to come up with something useful.
In short, one of the parts is made out of two U shapes to form a square, so there are 8 welds on each square, all straight lines. The other part is simpler as it has a single weld along X and another along Y, but does require rotating the torch to get to the corners.
-
Sorry for the missing pictures. Shame on me.
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