Machine speeds

[56flh]

Since I've seen questions about Machine speed settings in several posts and there has not been a definitive response I thought I'd throw this question into the mix.

Does anyone know of a source that, by machine, lists the max, safe speed value that should be entered in the Machine Interface Setup? In a previous thread there were several different machines and settings mentioned, but some of those machines appeared to be similar models but with different settings. Our MicroXcel Pfx ('99 model), with a value of 175 present from purchase, seems terribly slow compared to the machines sold today and as a result I run all programs at 100%. I realize that the air bearings etc. of our CMM are of different design from today's machines, but if I can speed it up I'd sure like to.

[craiger_ny]

I enter the highest number allowed. If it is too high you get an error. Faster, faster, faster, faster. But unlike most of the posts I read here I also run only 0.07 prehit and retract. Faster, faster, faster I am a production environments dream faster, faster, faster you stupid machine. If you have problems running this way slow it down and open up the prehit/retract. I run it this way from experience with each individual machine model we have. We just bought two One machines and I must say I am not comfortable enough with the rigidity (or should I say lack of rigidity) in the Z rail to do this, so I'm easing myself into it with those machines.

Craig

[Jan d.]

Speed has very little to do with the air bearings. Today's air bearings are not too much different from the ones in '99. It has all to do with your friction drive. If you go to fast, it will start to vibrate so bad (whipping) that it disintegrates.

I have found that the max speed has very little to do with program run speed (if you have smaller parts). The thing that really makes a difference is the accel and decel. Again, here is where the Pfx is at a severe disadvantage. If you go higher with that, you'll start to slip/slide over the drive shaft and in no time your machine is un-useable.



Jan.

[56flh]

Speed has very little to do with the air bearings. Today's air bearings are not too much different from the ones in '99. It has all to do with your friction drive. If you go to fast, it will start to vibrate so bad (whipping) that it disintegrates.

I have found that the max speed has very little to do with program run speed (if you have smaller parts). The thing that really makes a difference is the accel and decel. Again, here is where the Pfx is at a severe disadvantage. If you go higher with that, you'll start to slip/slide over the drive shaft and in no time your machine is un-useable.



Jan.

Most of the stuff I run would not be small, fitting in a 16" X 16" X 24"' space, thus the desire to speed up the acceleration. I guess I'll just live with its limitations for the two years until my retirement.

[Paul Barriage]

The speed in the interface, I believe, is the actual 'screen speed'. The movespeed you use in your program will determine the actual machine speed.

[Jan d.]

I guess I'll just live with its limitations for the two years until my retirement.

Yep, the machine is just not very quick. This was always a weak point for this model. Increasing accel/decel on this machine was always an issue. But B&S never embarked on design changes. The same drive was used on the original MicroXcels. Same result.

This was the reason Pfx and MicroXcel lost to the Italians.

It's a good machine though, just slow.



Jan.