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Messages - Wasi

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General Mach Discussion / G93 problems with 4th Axis
« on: May 16, 2016, 04:48:07 AM »
I have just started using 4th Axis simultaneous (have used successfully for indexing in the past) and can't seem to get G93 (inverse time) working.

A command like: G93 Y0 A90 G23 F500  will have 4th Axis creeps along at say 1-2degree/m

G94 (with either correct rotational diameter or nominal one such as 0.0001 ) will see a rotational speed as displayed in the F value but I am told it is much better to use G93.

G0 and G1 with the 4th Axis alone or using the MPG keys seems to work fine and in line with the F value for G1.

I have just set up a new postprocessor (with Bobcad) to accommodate the 4th Axis so I am wondering if I have missed something obvious in the setup either of the post or in Mach3 (I have v3.043.0066). The other three axes all seem to be working fine with the new post.

I see earlier posts in the forum suggest there was a bug in Mach3 in relation to G93 but also a reference to that having been fixed some time ago.


Any suggestions appreciated.

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LazyCam (Beta) / Re: Problems with Depth in Lazycam
« on: May 15, 2008, 05:01:58 PM »
Thanks Chip for your fast reply.

I tried to do as you suggested but was still getting odd results. I have now re-installed Lazycam and it seems to be working.

Many thanks again

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LazyCam (Beta) / Problems with Depth in Lazycam
« on: May 15, 2008, 05:13:04 AM »
I am using LazyCam 3.00.2 and I have a Mach3 licence.

I am loading a simple .dxf into Lazycam and need to make a multipass cut (4.5 mm at .5mm per pass) in a single layer.
I have a tool set to .5mm cut per pass.

I have used the layer tab to set safe Z height, cut start and cut depth. My Gcode post is not consistent however.

Having set Z safe at 1mm, cut start at 0, cut depth at 4.5 the Gcode generated correctly except that the first cut was -1mm rather than .5mm.
I then changed the Safe Z to .125mm and regenerated - there was no change - safe z was still 1 and first cut at -1mm.
I changed Safe Z to 6mm. and regenerated Gcode. Code now was single pass but at 6mm.
I changed cut depth to -4.5mm. Code now was single pass with safe Z 0.1mm and pass at 6mm.

I have also noted during this process odd numbers appearing in the Entity screen showing for instance that max Z for the chain is 1mm while the max Z for each entity in the chain shows as 0.

I also tried using the Set Depth command with the whole chain selected. This would on occasions overwrite the Cut Depth in the Layer tab but seemed to have no consistent effect on the Gcode generated.

I am confused. I am hoping that someone can point out the obvious thing I am missing here.

Any suggestions?

Thanks

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