Messages

1201

Show"N"Tell ( Your Machines) / Re: Brian's Emco Compact 5 Retro

« on: April 16, 2008, 07:50:53 AM »

Brian,

What's happened to this thread? I guess you've finished your retrofit long ago. Could you post some pictures tell us the results?

Thanks,
Daniel

1202

LazyTurn / Re: LazyTurn

« on: February 17, 2008, 03:06:36 AM »

Hi Art,

As soon as I load a DXF to LazyTurn, it starts using 50% of the CPU and doesn't respond. Any idea why should this happen?

Thanks,
Daniel

1203

LazyTurn / Re: LazyTurn

« on: February 15, 2008, 02:26:04 AM »

La coterie, you are right, my DXF does have some missing entities.

By the way, Chip, just was wondering how is that cannon turned - say you turned everything on the right side up to the left end ball - how the hell do you turn that ball? You can't re-chuck it with the ball side being on the right...

Daniel

1204

LazyTurn / Re: LazyTurn

« on: February 14, 2008, 11:54:44 AM »

Thanks, I tried the sample DXF. However, something is going wrong - the program is very slow and hardly responds to commands. After a minute of running it wasn't responding anymore and slowed down the computer using above 50% of it's CPU.
It takes me about 40 seconds to load the DXF.

Daniel

1205

LazyTurn / Re: LazyTurn

« on: February 14, 2008, 04:45:31 AM »

Hi Art,

Have a problem opening a DXF, I get the message: No appropriate drawing profile was found. It is attached, please check it.

In the mean while, I have two suggestions:

1. Displaying the tool and its form would be helpful - allowing the tool to move along the profile will let you see the clearances and choosing the right tool. I think there should be some standard tool shapes and an option of creating your own. Of course, to make this you need to add a tool table.

2. I'd like the stock to be always displayed (or rather be turned on and off) in a shaded color and as you define the procedures it updates to the correct shape.

Thanks,
Daniel

1206

General Mach Discussion / Re: need help! new driver wont work with mach 3

« on: November 23, 2007, 10:27:22 AM »

Yes. but I mean that I want to maintain the same speeds. I do not want to use microstepping and work 8 times slower.

Anyway, the microstepping issue is of no help for me. It just offsets the stalling range.

Thanks,
Daniel

1207

General Mach Discussion / Re: need help! new driver wont work with mach 3

« on: November 23, 2007, 09:02:19 AM »

Brett,
I use Mach2, though I tried Mach3 and had the same problem.

Miscrostepping does reduce torque, because when you switch to microstepping, then in order to maintain the same speed the driver has to send more frequent pulse rate to the motor. And if you look at a torque diagram of a step motor you can see that the torque decreases with the increase in ppm value. Anyway, that's what I know.

I've just hooked up it all to my PC (the first trials were made with a laptop) and there was the same problem. It's almost two weeks now that I'm  trying to solve this issue, before mounting the motors on the mill, and there is no progress.

Any suggestions?


Daniel

1208

General Mach Discussion / Re: need help! new driver wont work with mach 3

« on: November 23, 2007, 04:34:25 AM »

Hi Rob,
I have the same driver and experiencing some problems with it too.
When I use it with KCam the motors make a lot of noise and rotate only at very low speeds - trying to increase speed results in stalling the motors.
With Mach2 the motors rotate at very high speeds with no problem and surprisingly quite. However, there is a certain mid-range were the motors stall and hum. There is no such setting in Mach2 that I've not tried to adjust, but nothing seems to cure the issue.
This range is approximately between 1500 and 3000 ppm (using full step resolution), i.e. when set to 200 steps per mm the speeds range is 450-900mm/rev. Using micro-step offsets this range to other values. Besides, I do not like using micro-step, as it drastically reduces the motor torque.

Have you encountered something like this, or do you have any guess how can it be fixed?

Thanks,
Daniel