Messages

1

General Mach Discussion / Re: NFS Turn in version 57

« on: March 11, 2013, 05:34:49 AM »

If I swap to 62 will the turn wizards work OK?

2

General Mach Discussion / Re: Motor Tuning

« on: March 01, 2013, 05:54:57 PM »

I have a slightly different problem now.
Could not get NSF turn to work in version 57 or the other turn wizard to show any part shape display so had no option but to go back to 66.
On two occasions now the machine has come to the end of a cutting pass, withdrawn the tool but rather than move in + to restart the cut the it has started from the position it was at and cut further down the stock. Somebody said that the rapids could be too fast and the code thinks it has returned to the beginning but in fact has not moved at all. Please can somebody advise me what to do, I have reduced z velocity from 35 to 30, is there a guideline for this at all please.

3

General Mach Discussion / NFS Turn in version 57

« on: March 01, 2013, 11:24:42 AM »

After programming any of the wizards and clicking the Do it button I cant see a graphical representation of the shape I should be cutting. I get the green cut lines drawn as the code runs but there is no shape to see if I have programmed it right.

Is there a way of making this work?

Thanks

4

General Mach Discussion / Re: Motor Tuning

« on: March 01, 2013, 09:25:08 AM »

Just turned .489'' after asking .500''.

The guy who set up the lathe did not set the jumper on the X card correct. 

So much of my time wasted and yours Hood.

Thanks for all your help on this. There are a few niggles to iron out yet but its working a lot better.

5

General Mach Discussion / Re: Motor Tuning

« on: March 01, 2013, 08:56:35 AM »

Just discovered that he jumper on X motor driver was set to 3A and should be 6A, have changed it and am testing again.

6

General Mach Discussion / Re: Motor Tuning

« on: March 01, 2013, 07:25:52 AM »

Please explain to me how one command gives an error of .0015'' and another gives an error of .0045''.

Or why changing the stock diameter causes the error to change from .0035'' to .0045'', because I can repeat these all day long.

Or how taking .0005'' cuts on a 1'' stock down to .500'' ends up being .485'', out by .015''

Do any of the measurements I have provided look like I have loads of slop in the mechanics, please tell me because I cant work this out.

7

General Mach Discussion / Re: Motor Tuning

« on: March 01, 2013, 07:13:14 AM »

Set stock diameter to 1'' and touched X to side of stock and then set zero in Mach, also set zero with dial indicator.

Did a G54 X0 and the dial reads .002'' under. So 66 version is .0035'' under with that command and 57 is .002'' under. Better

Now set stock DIA to .995 and touched X, did a G54 X0 and the dial reads .0045'' short, so better than version 66 of .005'' but not by much.

if I do individual steps of .100'' so G54 X+.9, G54 X+.8 etc... and work my way in, then each is bang on correct.

Cutting test:

8

General Mach Discussion / Re: Motor Tuning

« on: March 01, 2013, 06:34:40 AM »

Gave it a feed value and its happy now. An X-1 move with Exact stop enabled gives an error reading of .0018'', so worse than version 66
Constant Velocity gives an X-1 error of .001'' better (not as good as version 66). Will see what the G54 commands do now.

9

General Mach Discussion / Re: Motor Tuning

« on: March 01, 2013, 06:20:59 AM »

Got 57 installed but it wont let me do an x-1, says 'Cannot do G1 with zero feedrate'

10

General Mach Discussion / Re: Motor Tuning

« on: March 01, 2013, 06:06:30 AM »

Hi Hood

Just turned Exact Stop on, as we had it set to Constant Velocity and an X-1 move error has gone from being .0015'' short to .0008'' short. Nearly halved it just with that option. Will download latest version. Is there a way to keep all the settings we have right now?