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  #151  
Old Sat 21 February 2009, 12:01
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Does the spring pull the motor tight against the rack? Or is there some obstruction that holds the pinion a little bit away from the rack?
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  #152  
Old Sat 21 February 2009, 15:16
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
There is no obstruction.

I have tried everything I could imagine, before asking.

Replaces original rack for another (that left the Z axis) and noise is the same.

I am lost.

Appears no affect the operation, but I think that a noise can be eliminated ...
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  #153  
Old Tue 24 February 2009, 20:54
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
Thumbs up MechMate YRD # 17 CNC Cut

Yeahhhhh
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  #154  
Old Wed 25 February 2009, 04:08
sailfl
Just call me: Nils #12
 
Winter Park, FL
United States of America
Yuri,

I believe that I have a noise in my rack also. Can you post a video clip on youtube with the noise. I have not looked at the problem for some time but I think in my case the rack is not square to the pinons.

Which rack are you noticing the problem on? Mine is on X.
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  #155  
Old Wed 25 February 2009, 05:47
myozman
Just call me: Mike #16
 
Demotte,IN
United States of America
Yuri,

You might check as Nils said about the pinion being square to the rack. Also, if there is play in the motor mount that could cause misalignment. I think I had this problem and just needed to tighten up a motor mount.

Mike
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  #156  
Old Wed 25 March 2009, 20:45
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
Nills and Mike,

Yes my problem is X, but in only one of four rack.

Mike, I believe there is misalignment or screw loose.

Moving with the hand (without engine coupled) noise appears in only one rack. I changed to another rack and continued noise.

See this old video (I'm no camera to make another video)
photos only

http://www.youtube.com/watch?v=7faAok0NCwY
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  #157  
Old Wed 25 March 2009, 22:38
myozman
Just call me: Mike #16
 
Demotte,IN
United States of America
Yuri,

I watched the video, hard to tell. Your machine seems to fast. You might slow things down and see if it helps any. You might also check the kernel speed, In Mach, we set it at 25000Hz. I had this set wrong and was having problems, Changed the setting, and it cleared everything up. Keep us posted.
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  #158  
Old Wed 25 March 2009, 23:14
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
Thanks Mike,

The speed at which it makes less noise is between 9.000mm/min and 16.000mm/min.

Below 6.000mm/min there is a huge noise.

I hope that the reduction belt (to be 2,66:1) noise decreases. Maybe
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  #159  
Old Thu 26 March 2009, 05:00
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Well, we have since found some faulty (badly made) racks in Belgium. . . . . . suggest you have a very close look at the teeth of the noisy rack and see how they compare to a good rack. Use a magnifying glass or a close-up photo.
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  #160  
Old Thu 26 March 2009, 17:25
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
OK photos

Modulo 1.5
Pinion 22
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  #161  
Old Fri 27 March 2009, 06:59
myozman
Just call me: Mike #16
 
Demotte,IN
United States of America
Maybe it's the lighting, but some of the teeth in the second picture seem to be different widths on the points.
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  #162  
Old Fri 27 March 2009, 08:08
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Can you completely remove this screw and try for the noise again?

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  #163  
Old Sat 28 March 2009, 18:00
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
Evolution
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  #164  
Old Sun 29 March 2009, 01:39
javeria
Just call me: Irfan #33
 
Bangalore
India
Yuri - did you convert a sitting table into controls cabinet

anyways good cabinet - but you did not show us the interiors.

RGDS
IRfan
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  #165  
Old Mon 30 March 2009, 16:17
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
Irfan,

This is the origin of the "table" - a door.

There are rumors that you do not see the interiors because it is not ready
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Last edited by YRD; Mon 30 March 2009 at 16:19..
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  #166  
Old Tue 31 March 2009, 05:00
javeria
Just call me: Irfan #33
 
Bangalore
India
Ha ha ha -thats a nice idea
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  #167  
Old Tue 31 March 2009, 10:24
domino11
Just call me: Heath
 
Cornwall, Ontario
Canada
Irfan,
Dont laugh too hard, I have 6 workbenches in my shop that all use old doors as the main platform. They were cheap, as in free.
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  #168  
Old Tue 31 March 2009, 10:33
javeria
Just call me: Irfan #33
 
Bangalore
India


Heath - where did you pluck all the doors from - seems you folks have no robbers in your localities
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  #169  
Old Tue 31 March 2009, 21:37
domino11
Just call me: Heath
 
Cornwall, Ontario
Canada
We replaced some old workbenches as work with nice new ESD compliant benches and they were throwing them in the dumpster. So I loaded two each day and then I have 6 now in my garage. They probably purchased the doors as a cheap way to make the bench tops years ago when the company was first starting out. Ok for my garage.
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  #170  
Old Fri 03 April 2009, 18:13
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
Hi,

I made a fault with you.

When I cut the entry and exit of air from my control desk, were the parts.

1 - Rectangle: 265 mm x 140 mm
2 - Circle - 108 mm

Cutting speed: 6.000mm/min
Tool: 6 mm - 2 cuts

Module 1.5 - 22 teeth - no reduction (yet)
What do you think ?
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  #171  
Old Fri 03 April 2009, 18:16
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
Supplementing.

Do not cut until the end because I have not the tool to "reset" the table (but I have a JoyPad - EMC2 )

Thickness of MDF - 25mm
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  #172  
Old Sat 04 April 2009, 01:25
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
It looks quite good to me. Are you happy?
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  #173  
Old Sat 04 April 2009, 22:52
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
In principle yes.

What worries me are the marks in the rectangle.

As will best with the reduction (2.66:1 or 2.4:1) ?
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  #174  
Old Sun 05 April 2009, 00:24
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
I cannot clearly see marks on the rectangle. A reduction system will make no difference to the cut quality of a rectangle. For that, you must look at:

- is the spindle/router held firmly (strongly) in the machine? There is no movement when you push/pull on the collet?

- is the spindle/router running accurate and balanced?

- is the cutting tool straight and balanced?

A bigger diameter tool will give a better finish. Spiral cutter also better than staight.
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  #175  
Old Fri 03 July 2009, 05:43
isladelobos
Just call me: Ros
 
Canary Islands
Spain
Send a message via MSN to isladelobos Send a message via Yahoo to isladelobos
Hey Yuri.

News in your reductions?
We can see one fine cut witouth reductions?
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  #176  
Old Sat 04 July 2009, 09:21
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
Red face

Hi Ros,

Not yet ...

But I have new motors:
50kgf.cm - 82,50mm x 91mm
Inductance: 3,5
2,6 Kg

Reduction: 48 x 18 XL 37 - (2,66:1) - Steel
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File Type: jpg DSC00167.JPG (102.8 KB, 543 views)

Last edited by YRD; Sat 04 July 2009 at 09:24..
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  #177  
Old Sat 04 July 2009, 09:37
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
Regarding the noise: a tip from a friend in Brazil, EMC2 setup to use the Gecko drive (although using a Smile ) and the noise decreased by 70% ... was not a mechanical problem ... but still not as quiet as other Mechmates I see on video ...

Simulation of cutting and drilling. Even with the previous setup.

It is acceptable, but only after the reduction.
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File Type: jpg DSC00169.JPG (140.6 KB, 546 views)
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  #178  
Old Sat 04 July 2009, 09:49
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Nice to see one of our Brasileiro MM's visiting again!
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  #179  
Old Sat 04 July 2009, 09:59
YRD
Just call me: Yuri #17
 
Brasilia - DF
Brazil
Hello Gerald ,

Some changes and things go more slowly ...
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