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Messages - RICH

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3461
G-Code, CAD, and CAM discussions / Re: G Code Basics
« on: July 10, 2011, 07:14:29 AM »
I would suggest you consider purchasing CNC Programming Handbook by Peter Smid.
RICH

3462
General Mach Discussion / Re: Wandering Machine
« on: July 10, 2011, 06:45:28 AM »
SMA,
- post your xml file
- What is your operating system and Mach version?
- Post info on your drives, motors, power supply
- post a picture of your machine

You motors are skipping and per your other thread you have tried different velocities and accelerations which didn't help.
There are a lot of reasons which could account for your problem.
Post the requested info.

REF: Other thread relative to this thread,
http://www.machsupport.com/forum/index.php/topic,18874.msg130765.html#msg130765
Do not start another thread and keep this thread going until problem is resolved.

RICH






3463
General Mach Discussion / Re: Lost Steps
« on: July 07, 2011, 06:47:47 AM »
SMA,
Confirm your steps per mm using a dial indicator and not the laser since that is not accurate enough for checking the step value.
You are consistant in the amount you are out and swapping axis implied that it is not a drive problem / signal path problem.
- Test that a simple movement of Z is consistant , post reversing the direction ...both up and down movement.
  set your steps per, the movement should agree with DRO display ( not using the laser please.......)
- Now check for backlash / non movement on reversal

RICH

3464
FAQs / Re: direct input commands in mach 3 mill
« on: July 06, 2011, 10:07:31 PM »
Happy star gazing my friend.
You may want to be on the look out for my star, it's the bright one at the end of all the stars which seem to be horizontal to the horizon, or said another way by my better half, horizontaly on the couch again. It doesn't shine much when my eyes are closed.  :D ;) ???

RICH

3465
General Mach Discussion / Re: Is backlash compensation broken?
« on: July 06, 2011, 09:56:29 PM »
Quote
Parallel port for the motion control, and SS for the additional IP?
Don't know for sure but don't think so.

Quote
From Warp9 site:
Glad to see that Greg got something implemented for BC.
I sovled the BC problem by eliminating it from my machines and it was worth the effort.

RICH

3466
General Mach Discussion / Re: OD Taper Wizard Help Needed
« on: July 06, 2011, 09:46:45 PM »
Mr. Technical,
Have a look at the attached.  ;)
RICH

3467
Post your xml file and also the manual for the xylotex board.
RICH

3468
I think a higher voltage along with lower amp setting for each motor would cure the problem. Try a 2 amp setting for each motor as total amps should not exceed total available. You need to deliver higher
voltage  as the stepper rpm increases  preferably the 24 volts available.

RICH

3469
General Mach Discussion / Re: Is backlash compensation broken?
« on: July 06, 2011, 06:53:35 AM »
Check that you have the latest SS plug in. Don't know how well BC works with the SS since it was implemented so maybe someone else can remark about it's BC functionality.
You may also want to visit  the WARP9 site since there are threads on BC  and the SS.

To post your xml fle give it a unique name like AIRGUN.XML and use then click the Additional Options which allows you to select the file from your pc to upload.

RICH
 

3470
General Mach Discussion / Re: Lost Steps
« on: July 05, 2011, 08:33:38 PM »
I can appreciate your problem and the difficulty your having.

I had a heck of a time trying to use my mill to do precise 3D machining and could not figure where those steps went or where and when it was skipping.
Like your code there were small increments of XYZ moves and changing from exact stop to CV or any other settings just wouldn't help.
Drove me nuts since  the machine otherwise worked well for all the other stuff i have ever done with it.

So here is what i did:
Rebuilt the X,Y,Z axis ....new motors of greater torque, new thrust bearings, and meticulous adjustment of the ball screw nut and thrust bearings.
Now no  backlash to deal with and feel very confident on the mechanics and controller side of things.
Now after 10000 lines or more  of code at much higher feed rates and rapids, the out of position is .001" at the end of the program.

I think the major cure on my end  was the new stepper motors which could deliver the acceleration and velocities required by the program.
Of course the other mods and adjustments provide for repeatable accuracy.

Even though i have the same motors,same gear ratio, same type / make of ball screws, same type belts and timing gears each axis has a different steps per unit
value ( maybe somewhat small but still different ) and I don't find that unusual.

Not saying you need to do the above, but, 3d maching places a higher demand on the system.
RICH

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