|
Posted by Ratedr on March 6, 2008, 10:57 am
Please log in for more thread options
I have retrofit an old posalux-type machine with a Haas 5c controller
and a 5c indexer. I have had it running fine for a while, and all of
a sudden I am having a strange issue:
I am setting it to make cuts at every 30 degrees. When I run it,
before it makes it full turn to 30deg it sticks and sounds like the
gears are grinding. I took apart my stepper motor and everything is
running fine there. When I attached my extra 5c controller and ran
the same program, it went to 30 degrees no problem, so I am now
assuming it is something in the controller.
Has anyone had that issue, or know where on the board of the cnc
controller I might be able to locate what the problem is? It seems
that it is having an issue when it is sending information, I dont,
however, know why it is happening, what is happening, or what I can do
to fix it. Any help would be GREATLY appreciated.
Thanks in advance
Scott
|
|
Posted by clay on March 7, 2008, 12:24 am
Please log in for more thread options
The ring gear in the indexer is binding cause it jumped a tooth in the
past. You "might " be able to reset the backlash, and get away with it,
but I doubt it, as your will introduce more backlash to get past the bad
spot on the gear. 5C indexers are only able to take lightweight cuts,
since they don't typically have brakes, and rely entirely on the wimpy
worm gear to take all the load. sometime you can get really lucky and
find a tiny tiny chip stuck in the ring gear.
The only reason the second controller worked is the stepper motor may be
a little stronger.
OR
The other plausable cause, is the stepper driver transistors/circuit are
going bad in the first controller, and not providing enough current to
the motor. The grinding sound you are hearing is the stepper motor
stalling when it gets to a rough spot on the indexer ring gear.
Some 5C indexers have an internal thread on the worm shaft, that you can
put a long cap screw into, and turn the indexer by hand/allen wrench
to feel where the rough spot on the gear is, and also set the backlash.
it usually destroys stepper motors when they are taken apart. Messes up
the permanent magnets.
ca
Ratedr wrote:
> I have retrofit an old posalux-type machine with a Haas 5c controller
> and a 5c indexer. I have had it running fine for a while, and all of
> a sudden I am having a strange issue:
>
> I am setting it to make cuts at every 30 degrees. When I run it,
> before it makes it full turn to 30deg it sticks and sounds like the
> gears are grinding. I took apart my stepper motor and everything is
> running fine there. When I attached my extra 5c controller and ran
> the same program, it went to 30 degrees no problem, so I am now
> assuming it is something in the controller.
>
> Has anyone had that issue, or know where on the board of the cnc
> controller I might be able to locate what the problem is? It seems
> that it is having an issue when it is sending information, I dont,
> however, know why it is happening, what is happening, or what I can do
> to fix it. Any help would be GREATLY appreciated.
>
> Thanks in advance
> Scott
|
| Similar Threads | Posted | | Strange chop saw problem | October 2, 2006, 4:40 pm |
| Strange gearmotor problem | February 24, 2008, 4:23 pm |
| Bendix sticking | April 18, 2007, 4:52 am |
| i was sticking to grin you some of my explicit offerings | August 12, 2007, 10:45 pm |
| Re: Sticking Stainless to granite/stone | August 14, 2008, 8:54 pm |
| Sticking Servo Power Feed Clutch? | March 20, 2008, 9:27 pm |
| Strange Knife "What is it" | December 13, 2006, 10:35 am |
| the strange accident | June 8, 2007, 9:37 am |
| 3 More Very Strange Bikes | October 1, 2007, 11:28 am |
| Very Strange Tools (What Are They?) | October 31, 2007, 1:40 pm |
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
> and a 5c indexer. I have had it running fine for a while, and all of
> a sudden I am having a strange issue:
>
> I am setting it to make cuts at every 30 degrees. When I run it,
> before it makes it full turn to 30deg it sticks and sounds like the
> gears are grinding. I took apart my stepper motor and everything is
> running fine there. When I attached my extra 5c controller and ran
> the same program, it went to 30 degrees no problem, so I am now
> assuming it is something in the controller.
>
> Has anyone had that issue, or know where on the board of the cnc
> controller I might be able to locate what the problem is? It seems
> that it is having an issue when it is sending information, I dont,
> however, know why it is happening, what is happening, or what I can do
> to fix it. Any help would be GREATLY appreciated.
>
> Thanks in advance
> Scott