Messages

5791

General Mach Discussion / Re: Help with circles

« on: September 13, 2011, 03:01:51 AM »

Hi Isaac,

As I am sure you already know - If the tool loading or feed rate causes any compression of your 'anti backlash nut spring' then 'backlash' will be present and could most likely cause the problem you are describing.

Something to perhaps try is to decrease the tool loading by reducing the feed rate and / or depth of cut and then use 'multi pass'.

Tweakie.

5792

General Mach Discussion / Re: Help with circles

« on: September 12, 2011, 12:28:17 PM »

Sorry Isaac my bad 

D.T.I is "Dial Test Indicator".

Tweakie.

5793

General Mach Discussion / Re: Help with circles

« on: September 12, 2011, 08:11:02 AM »

Isaac,

You probably need to check all the Kerk data sheets etc. for setting and adjustment of their screws / nuts.  http://www.haydonkerk.com/Portals/0/files/lead_screw_technology_engineering_data.pdf

Also check your machine for rigidity / tightness of all components and also for any lateral movement at the tool tip when stationary (and disconnected from the supply  )

The problem with backlash is that the total amount is very dependant on tool loading. You can set up a machine for zero backlash with a D.T.I but as soon as it is put into operation, the deeper the cut or greater the tool loading then the greater the backlash that starts to appear. Another important factor here is having good quality and sharp tooling (dull cutters are best consigned to the bin, unless they can be resharpened cheaply enough).

Tweakie.

5794

General Mach Discussion / Re: Help with circles

« on: September 12, 2011, 06:31:20 AM »

Isaac,

That effect can be caused by backlash on your X axis. Have you checked the axis for any slack or lost movement ??

Tweakie.

5795

*****VIDEOS***** / Re: scripting

« on: September 12, 2011, 02:08:47 AM »

Excellent Dave.

Well - would you do it again ??

Tweakie.

5796

Show"N"Tell ( Your Machines) / Re: New Project for the shop.

« on: September 11, 2011, 02:10:00 AM »

Nice additions Dave.

You just need another light over the posters. 

Tweakie.

5797

Show"N"Tell ( Your Machines) / Re: The Laser Project.

« on: September 08, 2011, 05:52:11 AM »

I must admit that I hadn’t really thought about it but yes I suppose it is a UK thing. 
The clue is in the shape – Its Ham (or called bacon when it’s fried).

There is enough serious stuff going on in life so I find that doing something completely daft, perhaps to bring a smile, every now and again makes a break. 

Tweakie.

5798

General Mach Discussion / Re: how much RAM mach3 can eat (i am getting restarts due to thermal trips)

« on: September 08, 2011, 03:08:31 AM »

Do you have evidence that it is a processor thermal trip that is causing the problem or could it possibly be something else ??

Just curious about this.

Also check your BIOS settings for over-temp sensing and actions to be taken.

Tweakie.

5799

General Mach Discussion / Re: how much RAM mach3 can eat (i am getting restarts due to thermal trips)

« on: September 08, 2011, 01:56:44 AM »

It was my understanding that the processor thermal trip "shut down" the PC rather than triggered a "restart". 

Tweakie.

5800

Show"N"Tell ( Your Machines) / Re: The Laser Project.

« on: September 07, 2011, 11:41:28 AM »

Now I really don’t want my wife to find out about this but, after a lot of research, I have discovered that once these tasty little morsels have been laser cut they can be cooked to perfection using GHD “Pink Orchid” hair straightners (although the “Gold Classic” work OK the “Pink Orchid” are best). 

Tweakie.

(I should perhaps mention that nothing was wasted here as my faithful little helper rapidly disposed of all the offcuts).