[Lu...] Posted October 9 Share Posted October 9 Hello, I wanted to see if there was some way to change how the CMM handles traveling to see if I can make the travel a bit smoother. I've noticed how whenever the machine stops moving or changes direction the machine shakes, this makes me worried that the part could end up moving sometimes or possibly could even be wearing out the machine itself. I have been looking into ways to speed up programs and as of right now I typically run programs at about 70mm/s (depending on the part/feature, that is just an average) and I fear if I was to speed up the travel speed it would worsen the shakes and could cause parts to move/damage. Right now it seems to go from stopped to max speed immediately, and it would be great if it would slow that acceleration down a bit, other options/ideas are welcome. Thank you! Link to comment Share on other sites More sharing options...
[Ke...] Posted October 9 Share Posted October 9 What model of CMM do you have that is exhibiting this behavior? Link to comment Share on other sites More sharing options...
[Ma...] Posted October 9 Share Posted October 9 It will depend on machine - duramax will act differently then for example Accura. We are running most of tested programs at 240mm/s for travel speeds. But we had a problem with part on roller without any fixation ( weight about 140kg, laying on two bars with sphere rollers, stopped just by mounted screws ) it was moving, so i changed screws for two side magnets - now 240mm/s is not moving that part. Link to comment Share on other sites More sharing options...
[DW...] Posted October 9 Share Posted October 9 Please sign in to view this quote. Please sign in to view this username. Your machine needs to be looked at by Zeiss...that is not normal behavior, especially at 70mm/s. Link to comment Share on other sites More sharing options...
[Lu...] Posted October 9 Author Share Posted October 9 Please sign in to view this quote. Please sign in to view this quote. My bad, forgot to include Im running a Contura G2 Please sign in to view this quote. It does definitely shake, but not that much at slower speeds which is why i run it usually around 70mm/s. My main concern with it is when i try to speed it up the shake is just much more noticeable and most of our fixtures use magnets, the magnets are decently strong but when sped up it gets to the point where i think the part might end up moving. Link to comment Share on other sites More sharing options...
[Ke...] Posted October 9 Share Posted October 9 A Contura G2 shouldnt really exhibit any kind of shake during movement (some machines, specifically those on Air pods, will rock during travel by design), this sounds like something that you should have a Zeiss Service tech come take a look at and see what is going on. They are also the only ones who can adjust the acceleration parameters of the CMM Link to comment Share on other sites More sharing options...
[Ma...] Posted October 9 Share Posted October 9 I remember we had a small chip stuck in air bearing and it was scratching granite - there were oddities on graphs ( line profile with active head ). Are you seeing any problems? Link to comment Share on other sites More sharing options...
[Ri...] Posted October 9 Share Posted October 9 (edited) I think I understand what the OP is wanting, typically the start and stop forces generated by the motors can cause the CMM to "shake" for a lack of words, weight and inertia. Most axis motors have a lot of torque. This is what I use to ask. Back in the day, I use to ask the Calibration Techs to adjust the motor speed so as to make the CMM accelerate and slow down as if I was driving a luxury car that had power. When I worked on a DB900 (rather large CMM) you could see the CMM move by eye when accelerating and braking after full speed movements. They were able to make the CMM move buttery smooth. Edited October 9 1 Link to comment Share on other sites More sharing options...
[Lu...] Posted October 10 Author Share Posted October 10 Please sign in to view this quote. I will definitely be considering this thank you Please sign in to view this quote. I don't recall having any issues with line profiles, and the granite doesn't seem to have scratches in it along the path the CMM travels (besides some small dents due to operators not being careful...) but i will be keeping an eye out Please sign in to view this quote. Thank you for explaining it better than I did lol, yeah the machine moves more forward and back due to the weight, and I've noticed that using the controller it will accelerate more gradually than when in CNC mode, which would solve my potential issue when i speed it up. I will be considering reaching out to Zeiss to see if we could adjust the motor speeds as you said. Thank you Link to comment Share on other sites More sharing options...
[No...] Posted October 13 Share Posted October 13 First of all, there's no way to influence the acceleration behavior form within Calypso. It requires a modifocation of these parameters in the controller unit. There are separate parameters for maximum speed and maximum acceleration, they can even be set differently for each of the axes, whatever sense that may make. Changing these parameters is a matter of minutes for a service tech. Link to comment Share on other sites More sharing options...
[Lu...] Posted October 13 Author Share Posted October 13 Please sign in to view this quote. You said that the modification would be done through the controller, would changing the acceleration in the controller only apply during manual control using that controller? I am pretty happy with how the acceleration is when moving manually using the controller, I'm only really concerned with the CNC travel acceleration. Link to comment Share on other sites More sharing options...
[Ri...] Posted October 13 Share Posted October 13 Please sign in to view this quote. I never learned what the Zeiss tech adjusted in the controller, but it had no effect on manual maneuvering. 1 Link to comment Share on other sites More sharing options...
[No...] Posted October 13 Share Posted October 13 As far as I know there are also seperate parameters for joystick and CNC movement. 1 Link to comment Share on other sites More sharing options...
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