Messages

2681

General Mach Discussion / Re: Acceleration set the same for all axes?

« on: May 03, 2012, 05:16:09 PM »

I would say that the "SYSTEM" is only as good as the weakest link. If one axis is restrictive then one should work within that restriction and not push the weakest link into unreliable operation. If not satisfied with the outcome then change the system to satisfy your needs.

RICH

2682

General Mach Discussion / Re: newbie - help with solving backlash issues

« on: April 29, 2012, 06:16:47 PM »

Hmm..... looked the third pdf you posted
Move the Z all the way up or down or close to the end of the travel and adjust the block. I assume that the screw is a little off the center travel and with a tight nut adjustment that is what is causing the binding. You'll just have to play with it.

RICH

2683

LazyTurn / Re: Index pulse C3 and G540

« on: April 29, 2012, 06:07:50 PM »

Hood,
Glad it wasn't D1x1000  as i would fall asleep waiting to get there, never the less, interesting 
got any others?

RICH

2684

General Mach Discussion / Re: Strange backlash activity.

« on: April 29, 2012, 05:59:24 PM »

but it seems no matter what I put in the % box it has no effect on the machine

Haven't used backlash in a long time. Now if i can only find my 50-50-50 settings rule ......which goes something like this:

50% - for the % of max speed ( in backlash flyout window)
Shuttel Accel .050 to start ( in general config)
Debounce Interval 50 to start  ( in general config)

The last two settings have an affect on how the backlash is implemented.

RICH

2685

LazyTurn / Re: Index pulse C3 and G540

« on: April 29, 2012, 05:32:30 PM »

Hood,
Never new that ....... just tried and works like a charm
How do you know these neat little lilttle things?

RICH

2686

Tangent Corner / Re: Help with Wedding Present Idea

« on: April 29, 2012, 05:26:00 PM »

How about some jest.....like four costers with replaceable  sayings....maybe

What's yours is now mine and what's mine is still mine
To death do us part and you first
Great life if one  dosen't weaken
Married dosen't mean ending self play

Get old fashioned, nice little custom box with two mood rings.

Good idea's...you be the judge, 

RICH

2687

General Mach Discussion / Re: Unwanted Step Pulses

« on: April 29, 2012, 05:06:14 PM »

Good that you found the culprit Alan.........now I can go back to a good snooze.

RICH

2688

LazyTurn / Re: Index pulse C3 and G540

« on: April 29, 2012, 04:59:14 PM »

Jayson,
As it says on the screen... pitch...... which is 1/24 in your case.

If it say's  over max feedrate then you are trying to cut a thread with the motor rpm to high for the velocity you defined in motor tuning.

ou may want to take a look at Threading on The Lathe write up in  Members Docs.

RICH

2689

General Mach Discussion / Re: newbie - help with solving backlash issues

« on: April 29, 2012, 04:50:58 PM »

By binding I was meaning that the screw may not be the same all along the length such that when the nut has very little play it will get harder to turn in a few spots.

With the stepper motor removed you should be able to turn the screw rather easily. Using your thumb and middle finger
to turn a nut  you would need to exert a lot on a big nut  to turn 100 in oz ( very rough example to relate in terms of in oz ).
With the screw free to turn you would adjust the nut and then turn the screw by hand and if you find a place where it gets
hard to turn to move the axis you need to see what is causing it. Sorry but kind of like telling someone how to tie their shoe laces.....

RICH

2690

General Mach Discussion / Re: Unwanted Step Pulses

« on: April 29, 2012, 10:04:28 AM »

Alan,
Can you post a pic of your Z axis and machine?

Hey Jerry, what you say, and I do agree , that  reducing accel should help.
What I said in reply #12 needs additional or better explaination, but, for now don't want to go there.
Like yourself, desire to eliminate the mechanical and code end of things first.
 
RICH