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I'm trying to run a few simultaneous 5 axis surfacing toolpaths on a Haas UMC but I can't get the machine to cut at the correct feedrate. I started out with an angle increment of 3 degrees but the motion was pretty jerky so I reduced it to .5 degrees then .1 degrees. The motion looks smooth now but the toolpath takes far longer to run. According to backplot the toolpaths should've taken a little under a minute and a half but at 3 degrees the actual machining took just under 6 minutes and at .5 degrees probably closer to 20 minutes. I'd imagine .1 degrees would take over an hour. I tried playing with the toolpath tolerances in mastercam as well as the machine's smoothing settings but none of that seemed to help. Is there an easy way to get a simultaneous 5 axis toolpath to cut smoothly and at the feedrate you specify?

Thanks

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Welcome to 5-Axis... the land of compromise. :rofl:

You're going to have to do some experimenting with tolerance, point spacing, etc... to find that cycle time you can accept while maintaining the tolerance/surface finish you desire. I don't have any Haas guidelines unfortunately. I know what works for my FANUC Controlled Matsuuras but that is a completely different class machine and completely different control

I will say that regarding point spacing that around .010 (254µm) the points look like feed lines and not facets so more points begins the point of diminishing returns.

 

HTH

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On 5/26/2021 at 12:57 PM, cncappsjames said:

Welcome to 5-Axis... the land of compromise. :rofl:

You're going to have to do some experimenting with tolerance, point spacing, etc... to find that cycle time you can accept while maintaining the tolerance/surface finish you desire. I don't have any Haas guidelines unfortunately. I know what works for my FANUC Controlled Matsuuras but that is a completely different class machine and completely different control

I will say that regarding point spacing that around .010 (254µm) the points look like feed lines and not facets so more points begins the point of diminishing returns.

 

HTH

I contacted a Haas apps engineer, turns out lookahead was being turned off by a code in a subprogram for an aftermarket TSC system so that was affecting my dynamic toolpaths and my simultaneous 5 axis toolpaths. He fixed them and now the paths run as expected. Thanks!

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58 minutes ago, Brandon Swihart said:

I contacted a Haas apps engineer, turns out lookahead was being turned off by a code in a subprogram for an aftermarket TSC system so that was affecting my dynamic toolpaths and my simultaneous 5 axis toolpaths. He fixed them and now the paths run as expected. Thanks!

What at TSC system is being used so I can be on the look out for other customers?

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