Messages

1

General Mach Discussion / Re: Deckel Mach Retrofit

« on: August 15, 2007, 03:56:21 PM »

"" I am assuming that the control assumes the servo is "caught up" when the control ceases to output additonal pulses."""

Alan, I don't think the control "knows" much of anything about the servo loop except that it has or has not reported an error.
If the loop is doing it's job, it cannot continue if it hasn't positionally responded correctly to the step input, so the axis will "have" to be in position for that next set of streaming steps or the loop would have already faulted out.  It can't just take the next series of steps and "forget" it didn't make position on the first stream.
If the servo is "catching up" by applying more power at the moment the change of direction comes, I have to presume (this is over my head), that the drive has a buffer and the servo will continue to catch up...or fail.
It will continue to attempt to make the first position, not just "give up" and start taking new steps.
I think it is fractions of a second we are talking about here.  The drive will fault before that buffer is overfilled and steps lost.

Sean

2

General Mach Discussion / Re: Deckel Mach Retrofit

« on: August 14, 2007, 03:33:33 AM »

There are no underlines on my Mac...but I don't know if that helps.  Seems the HTML would be the same.

3

General Mach Discussion / Re: Deckel Mach Retrofit

« on: August 13, 2007, 09:19:03 PM »

Here is an example of the machine we are hoping to retrofit.

It has glass scales for feedback, AC servo's, a gearbox for speeds...etc.

4

General Mach Discussion / Deckel Mach Retrofit

« on: August 13, 2007, 07:17:08 PM »

Hi Everyone,
My name is Sean and I am the moderator of the Deckel forum over at Practical Machinist.

After many years of talking about it, it looks like the "Deckelites" may finally be willing to attempt a PC conversion of a Deckel CNC milling machine as a group.

While I am a pre-Mach user/owner of Art's software, it has been years since I have been in this forum as at the time, Art's software was quite "young".  I did manage a Bridgeport Boss retrofit using the beta of Mach 1, but the Deckel was out of reach at that time.

Today, as Mach has evolved, and more interest in converting a Deckel NC has been introduced, we are now very interested in moving on with a retrofit.

The Deckel NC is a very special machine, of the highest quality, and a very friendly conversational called a "Dialog", which can still hold it's own 20 years later.  This control excels at shop floor programming and the logical subsitution of buttons/modes for what would otherwise be a "manual" milling operation using handwheels.

In any case, if you could offer and help, or would just like to follow along, that thread can be found here:

http://www.practicalmachinist.com/cgi-bin/ubbcgi/ultimatebb.cgi/topic/6/2104.html?

We'll probably be directing most tech' questions to this topic here on the Mach forum, but will have more machine specific issues at the Deckel forum.

It's good to be here again, and thanks for having a look!

Sean