Hobby, 3D, Relief, CNC  

[ Új üzenetek · Tagok · Fórumszabályzat · Keresés · RSS ]
Oldal 1 / 11
A fórum moderátora: KisKZ, Tomi, tweakie, Amatőr 
Fórum » Only in English » Let's talk about...! » We all make mistakes.
We all make mistakes.
tweakie Dátum/Date: Szerda, 2012-05-30, 09:26 | Üzenet/Post # 1
alapvető tag
Csoport/Group: Adminisztrátorok
Üzenetek/Posts: 972
Kitüntetések/Medals: 6
Hírnév/Fame: 5
Helyzet/Status: Offline
I don't normally post pictures of the trash but this may be of help to others.

I recently replaced the flexible coupling on my Y Axis and everything was fine until I cut this piece (which was profiled in two passes with a 30 degree engraving point).
The new coupling was bored 1/4" and the motor shaft is 6mm - what I thought was tight obviously wasn't (but it is now biggrin ).

Tweakie.

Csatolások/Attachments: 7784854.jpg(37Kb)


Success consists of going from failure to failure without loss of enthusiasm.
 
Amatőr Dátum/Date: Szerda, 2012-05-30, 20:25 | Üzenet/Post # 2
alapkő
Csoport/Group: Adminisztrátorok
Üzenetek/Posts: 2207
Kitüntetések/Medals: 6
Hírnév/Fame: 3
Helyzet/Status: Offline
tweakie, it's a lucky case when You could find the problem after a short work. I can imagine a situation when the coupling makes just a little playing on the shaft and makes several wrong workpieces until it can be found.
I had a similar case with a loose screw what sent a cople hours workpiece into trash.
The best we can do is weld down all the loose parts smile


H1i.hu
 
tweakie Dátum/Date: Csütörtök, 2012-05-31, 09:18 | Üzenet/Post # 3
alapvető tag
Csoport/Group: Adminisztrátorok
Üzenetek/Posts: 972
Kitüntetések/Medals: 6
Hírnév/Fame: 5
Helyzet/Status: Offline
Hi Amator,

Yes indeed, lucky to find the problem first time.

Newcomers to the world of CNC may often suspect missing steps as being the cause but on many occasions problems are more often than not of a mechanical nature.

Welding is good because if something can possibly come loose then sooner or later it will come loose biggrin

Tweakie.


Success consists of going from failure to failure without loss of enthusiasm.
 
elektron Dátum/Date: Péntek, 2012-06-01, 00:31 | Üzenet/Post # 4
aktív tag
Csoport/Group: Felhasználók
Üzenetek/Posts: 229
Kitüntetések/Medals: 1
Hírnév/Fame: 2
Helyzet/Status: Offline
Tweakie, is there a good collection of the possible causes of missing steps somewhere on a cnc forum ?

elektron
 
tweakie Dátum/Date: Péntek, 2012-06-01, 06:17 | Üzenet/Post # 5
alapvető tag
Csoport/Group: Adminisztrátorok
Üzenetek/Posts: 972
Kitüntetések/Medals: 6
Hírnév/Fame: 5
Helyzet/Status: Offline
Quote (elektron)
Tweakie, is there a good collection of the possible causes of missing steps somewhere on a cnc forum ?

elektron


Hi elektron,

Yes indeed, but you could spend all day reading biggrin

There are thousands of them here http://www.google.com/cse?cx=.....page=1

And again here http://www.machsupport.com/forum/index.php?action=search2

As mentioned earlier, most of the problems relate to mechanical issues such as tightness or binding of the lead screw / linear slides which show up when an axis is driven too fast (stepper motor torque decreases as rotational speed is increased and there comes a point where the resistance to motion exceeds the available torque).

Tweakie.


Success consists of going from failure to failure without loss of enthusiasm.
 
Fórum » Only in English » Let's talk about...! » We all make mistakes.
Oldal 1 / 11
Keresés:

Copyright HobbyCnCArt © 2016