Mastercam 2019 Backplot and Verify times incorrect

[Corey Hampshire]

 I have ran into an issue with the cycle times that Verify and Backplot tell me for a particular machine. I am thinking that the issue is with the machine or control definition. In my one mill, cycle times are within about 10 mins. This to me is acceptable. Just did another part in another mill and cycle time is an hour longer than what Matercam says. I have verified that the machine was running at 100% feed speed and rapids. I am thinking that something needs adjusted in the Machine def or Control def, but don't know where to start.

Has anyone else seen this issue? Is it a known bug? Is this an issue I can take care of myself?

Thanks in advance.

[Leon82]

Are there a lot of high speed paths in the program? 

Some machines will slow down from lookahead 

[Corey Hampshire]

Yes, there is. I am using Area rest Roughing to machine the majority of this part. I do have a setting for the high speed look ahead which I am using. Is there a way to correct for the value that I use?

[gcode]

Go to the Feeds and Speeds section of the Machine Definition, and make sure the feed rate units are correct and

the max rapid settings are accurate

[Matthew Hajicek - Singularity]

There will also be inaccuracies for acceleration.  Though I program my back feed a 833 IPM (my max) I'm sure it's not actually getting even close to that IRL.

[Corey Hampshire]

Thanks guys. I will dive into the Feeds and Speeds in the machine def today and see if I can make it more realistic. I believe it probably is the high speed paths and smoothing that is doing it. I had never even thought of it.