Messages

1

General Mach Discussion / Re: ScrewMapping

« on: May 07, 2013, 05:16:56 PM »

Yay, well it turns out that if you dont use a parrallel to straighten your dti holder and instead use a bit of wonkey metal in the shop you can loose a hundred microns (infact two hundred at one point).

All sorted 15microns YAY!!!

A

2

General Mach Discussion / Re: ScrewMapping

« on: May 06, 2013, 06:18:30 PM »

Thanks hood, ill give that a go, I do have a little room to try that!

A

3

General Mach Discussion / Re: ScrewMapping

« on: May 06, 2013, 06:14:24 PM »

Lol, I expect some, just not 100 microns...eeek!

Good point, may be the block however the block is rated C5...I am going to have to dismantle the entire thing tommorrow....urgh those motors are heavy and a PITA to take off!

Cheers,

A

4

General Mach Discussion / Re: ScrewMapping

« on: May 06, 2013, 05:43:53 PM »

Not convinced its backlash as these are C5 rated screws with high preloaded double nuts - should be around 25 microns, or like the other two axis 15 microns.  Unless I am doing somthing daft

A

5

General Mach Discussion / Re: ScrewMapping

« on: May 06, 2013, 03:34:45 PM »

Just to add, if I ask it to move 5mm it goes 4.9mm but always back to zero!

A

6

General Mach Discussion / Re: ScrewMapping

« on: May 06, 2013, 03:29:22 PM »

Hi Hood,

So a dro is the only way? Shame.

I have new double nut screws (gten) c5 rated and I am getting 100microns backlash.  When set to move 1mm it will always go to 0.9mm but when returning to zero, it hits zero dead on.  I thougth mapping the screw might help!

If any suggestions please let me know!

Cheers,

A

7

General Mach Discussion / ScrewMapping

« on: May 06, 2013, 02:26:07 PM »

Hi Everyone,

I have DMM tech servos and would like to use the screwmapping function with the servo encoders.  My first question will this work?  Or do I need a DRO installed.

Second how do I get the feedback from the encoder into mach3?

Thanks,

Andy

P.s Interesting that there is little documentation or support on ScrewMapping

8

General Mach Discussion / Re: Servo Basics

« on: January 20, 2013, 07:03:18 PM »

hmm think its more compelx, will have to study the documentation, however its not  a how to guide sadly.

Thanks for all your help.

Andy

9

General Mach Discussion / Re: Servo Basics

« on: January 20, 2013, 06:37:38 PM »

Hi Hood,

I see, is it as simple as I change the internal gearing from 500 to 1000 and my steps per is reduced from 2000 to 1000?  This could be the solution.

Thanks,

Andy

10

General Mach Discussion / Re: Servo Basics

« on: January 20, 2013, 05:44:38 PM »

Hi Hood,

Yes the internal gearing is set to 500, this is the lowest value.  What is the purpose of internal gearing, is this to give you options like in this situation?

Thanks,

Andy