MechMate CNC Router Forum

Go Back   MechMate CNC Router Forum > Electrical & Electronic > 70. Control Systems
Register Options Profile Last 1 | 3 | 7 Days Search Today's Posts Mark Forums Read

Reply
 
Thread Tools
  #1  
Old Thu 11 July 2013, 11:32
ilmataat
Just call me: Ivo #120
 
Jõgeva
Estonia
Settings problem???

Hey for everybody.

I hope someone can help me.

I have problem whit mine cuting result. If i want to cut rectangle result is:

1. Starting conner:
http://www.mechmate.com/forums/attac...1&d=1373563161
2. Oposite side
http://www.mechmate.com/forums/attac...1&d=1373563161

For eny arc or circle dont have this kind problem, but if program starts the tool is not in correct deepth before x and y axis started moving.

I tested for diffrent feed rates but nothing chance.

It can't be in g-code. beacuse if i use mach3 surfacing wizard. there is same problem.
Attached Images
File Type: jpg IMG_1843.jpg (39.2 KB, 224 views)
File Type: jpg IMG_1845.jpg (40.1 KB, 217 views)

Last edited by ilmataat; Thu 11 July 2013 at 11:35..
Reply With Quote
  #2  
Old Thu 11 July 2013, 13:22
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Second picture tells me you have a gear that is loose on the shaft.
Reply With Quote
  #3  
Old Thu 11 July 2013, 13:36
ilmataat
Just call me: Ivo #120
 
Jõgeva
Estonia
No i checked this, gears are tightily on a shaft. And this is not possible beacuse this mistake exsist every time.

I don't understand why x and y axis starting move but z axis is not in right deep, tool arhives right deep't about 20 mm after starting point.


I think, maybe i have wrong settings in mach3
Reply With Quote
  #4  
Old Thu 11 July 2013, 15:00
bradm
Just call me: Brad #10
 
Somerville(MA)
United States of America
Ivo, check those gears again, very carefully. Gerald is very, very good at photo analysis, and your symptom is very common, and has fooled many people who eventually discovered that there really was a loose pinion. It is possible, and typical for this error to be highly repeatable - same every time.
Reply With Quote
  #5  
Old Thu 11 July 2013, 15:08
danilom
Just call me: Danilo #64
 
Novi Sad
Serbia
Corner rounding also can mean you have among loose gear a small acceleration. CV tries to keep constant speed so it rounds the corner. Try Exact Stop in general config or get acc up.
Reply With Quote
  #6  
Old Thu 11 July 2013, 22:20
ilmataat
Just call me: Ivo #120
 
Jõgeva
Estonia
You mean this, i have to change acceleration higher in motor turning options? not in general config? i don't see there eny oppurturnity to change acceleration.

Put How high this acceleration must be. i have 69.976 steps per, velosity 7002 mm/m, acceleration is 29.175 mm/s Is it to low?
Reply With Quote
  #7  
Old Thu 11 July 2013, 23:23
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
You probably have two problems, mechanical and settings.

The bottom half of the bottom picture shows a "wobble" or a "bounce" and that is impossible to be settings or software. Typical when coming out of a corner and the direction of forces on the cutter have changed, making a gear to decide to vibrate loose and move to the other side of the freedom/backlash/play that it has. You can only find that play if you switch on the motors and turn the gear with heavy pliers.
Reply With Quote
  #8  
Old Fri 12 July 2013, 01:21
danilom
Just call me: Danilo #64
 
Novi Sad
Serbia
Ivo... put velocity somewhere in the range from 500 - 800 for start 29 is incredibly low if you are using milimeters
Reply With Quote
  #9  
Old Fri 12 July 2013, 10:10
ilmataat
Just call me: Ivo #120
 
Jõgeva
Estonia
Thanks for evrybody. Problem is solved.

Accleration speed was too low, like danilom say's.

Thank you
Reply With Quote
  #10  
Old Fri 12 July 2013, 10:25
danilom
Just call me: Danilo #64
 
Novi Sad
Serbia
Show us some pictures of something you cut, we all enjoy seeing those pictures along those when something is wrong
Reply With Quote
  #11  
Old Fri 12 July 2013, 18:44
Tom Ayres
Just call me: Tom #117
 
Bassett (VA)
United States of America
Yeah, make an example of you.
Reply With Quote
  #12  
Old Mon 15 July 2013, 22:05
ilmataat
Just call me: Ivo #120
 
Jõgeva
Estonia
Before: lleft pic(Acceleration speed is very low compared velocity speed)
http://www.mechmate.com/forums/attac...1&d=1373947253

After: Right pic(balanced acceleration speed whit velocity speed)

http://www.mechmate.com/forums/attac...1&d=1373947253
Attached Images
File Type: jpg IMG_1843.jpg (39.2 KB, 162 views)
File Type: jpg IMG_1853 (600 x 400).jpg (48.4 KB, 161 views)
Reply With Quote
Reply

Register Options Profile Last 1 | 3 | 7 Days Search Today's Posts Mark Forums Read

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Typical settings for Mach motor tuning Kobus_Joubert CNC motion control software 19 Sun 15 May 2016 10:04
Mach 3 CV settings Greg J General - MM Operating 2 Wed 17 November 2010 14:49
limit-settings/pin's and port's kongblom 70. Control Systems 6 Fri 20 November 2009 09:39
Today's changes to the Forum settings.... Gerald D Test Area for this forum 8 Sat 26 May 2007 11:48


All times are GMT -6. The time now is 06:51.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.