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Author Topic: Leveling the gantry and table  (Read 11434 times)

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Offline Hood

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Re: Leveling the gantry and table
« Reply #10 on: January 26, 2010, 09:34:56 AM »
You may be right Phil, I have no experience of routers but my thoughts are MDF (I presume thats what MDG was?), even at 1" thick will not take too kindly to being fixed only at the corners and when shimmed will only be supported at these 4 points, I think it will start to sag in the middle through time.


Hood
Re: Leveling the gantry and table
« Reply #11 on: January 26, 2010, 09:59:03 AM »
Hood i know what you are saying is correct.

But i have painful memories of when i worked in a toolroom, the surface grinder J&S 540 was worn on the cross slide & i was forever complaining about it. The management naturally thought it was me, they had the service guy done who was the biggest bodger i had ever seen said it was OK.

So to prove it first i ground the mag chuck then i ground a piece of steel  that was 1" wide X 6" long i ground this at 90 deg to the table

Got the management down to explain.

I mounted a DTI in the optidress ran it over the chuck perfectly level, then i put my test piece "Ground in situ" on the chuck ran it across again perfectly level .

Then turned the piece 90 degrees put the DTI on it. It read Zero +.002 Zero over the 6"

I got a brand new 540  ;D ;D ;D

I believe this is a common fault with all old at least J&S 540's

So this is why the OP needs to know that his axis are not curved i know he doesn't need that precision but my argument is valid

Phil

The Good Thing About Mach3, Is It's very Configurable

The Bad Thing About Mach3, Is It's Too Configurable

Offline Hood

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Re: Leveling the gantry and table
« Reply #12 on: January 26, 2010, 11:31:22 AM »
Here what you are saying Phil, even an ex fisherman can grasp that clear explanation ;D

Hood

Offline NormB

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Re: Leveling the gantry and table
« Reply #13 on: January 26, 2010, 12:24:04 PM »
the whole right side full length is low compared to the right side.  It's as though one rail is a bit lower than the other that is why I thought of shimming up the whole side but with what.  Now machining is I think a more permenant and correct way to make it right.  I do have a variable speed router if necessary I have a 3/4 plunge bit can do the samething smaller steps.
Re: Leveling the gantry and table
« Reply #14 on: January 26, 2010, 12:32:19 PM »
NormB,

Is there no adjustment anywhere ?

Can you post a picture

Phil
The Good Thing About Mach3, Is It's very Configurable

The Bad Thing About Mach3, Is It's Too Configurable

Offline NormB

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Re: Leveling the gantry and table
« Reply #15 on: January 26, 2010, 02:00:41 PM »
No the sides are made up from extruded aluminium from 20/20 bolted together then round rod supports mounted to each side holding 2 veearings supporting the gantry on each side linear bearings.  The table top rests on the side rails and bolts to them. 

Offline NormB

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Re: Leveling the gantry and table
« Reply #16 on: January 26, 2010, 02:01:17 PM »
If you have a way to view Autocad files I have a drawing of the assembly

Offline NormB

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Re: Leveling the gantry and table
« Reply #17 on: January 26, 2010, 02:03:29 PM »
Well I will just attach it anyway....

Offline NormB

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Re: Leveling the gantry and table
« Reply #18 on: January 26, 2010, 02:12:00 PM »
Found a way to see it without cad
Re: Leveling the gantry and table
« Reply #19 on: January 26, 2010, 04:06:37 PM »
NormB,

DFX would be good, i looked at the bmp file but i cant get up close as i loose resolution.

Phil
The Good Thing About Mach3, Is It's very Configurable

The Bad Thing About Mach3, Is It's Too Configurable