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Forum: 50. Toolheads Fri 11 June 2010, 06:54
Replies: 49
Views: 93,408
Posted By Gerald D
Red, you have it exactly right. The reading head...

Red, you have it exactly right. The reading head stays at a fixed height, on the y-car, above the bottom of the gantry, which means it cannot crash into the object.
Forum: 50. Toolheads Tue 08 June 2010, 11:26
Replies: 49
Views: 93,408
Posted By Gerald D
The model FDHK 10 does not give an output value...

The model FDHK 10 does not give an output value of the distance. You use the pot to set the "trigger" point . . . . .it behaves like a proximity switch. If the the target is nearer than the set point...
Forum: 50. Toolheads Tue 08 June 2010, 04:42
Replies: 49
Views: 93,408
Posted By Gerald D
Pablo, I cannot see what you are...

Pablo, I cannot see what you are seeing......which site are you talking about?
Forum: 50. Toolheads Mon 07 June 2010, 23:49
Replies: 49
Views: 93,408
Posted By Gerald D
Ries, that is great experience and an interesting...

Ries, that is great experience and an interesting post - thanks!

Laser distance sensing is done by at least 2 different methods:
- the triangulation method (as per the modules mentioned earlier,...
Forum: 50. Toolheads Mon 07 June 2010, 13:07
Replies: 49
Views: 93,408
Posted By Gerald D
Before hacking a Bosch, or similar, there are a...

Before hacking a Bosch, or similar, there are a couple of things that must be checked:
- fairly small spot size
- a good resolution
- and a good speed of getting the data out.

Also realise...
Forum: 50. Toolheads Mon 07 June 2010, 09:46
Replies: 49
Views: 93,408
Posted By Gerald D
Can I gently point out that the title of this...

Can I gently point out that the title of this thread is Laser scanning using a distance-sensing laser ?
Forum: 50. Toolheads Mon 07 June 2010, 05:51
Replies: 49
Views: 93,408
Posted By Gerald D
There are distance sense lasers on e-bay for $100...

There are distance sense lasers on e-bay for $100 at the moment, but they are the wrong spec. (long distance (low near resolution), big spots) Anybody know what the Leica Disto D330i ...
Forum: 50. Toolheads Sun 06 June 2010, 12:28
Replies: 49
Views: 93,408
Posted By Gerald D
Sorry Pablo, that is 2D scanning only ...... you...

Sorry Pablo, that is 2D scanning only ...... you can call it "tracing", like using old-fashioned tracing paper.
Forum: 50. Toolheads Sun 06 June 2010, 08:05
Replies: 49
Views: 93,408
Posted By Gerald D
Hennie, you can buy a Baumer distance sensor from...

Hennie, you can buy a Baumer distance sensor from RS components (http://za.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=3651651) for R7000 [$1000], which IS expensive, but it...
Forum: 50. Toolheads Sun 06 June 2010, 03:39
Replies: 49
Views: 93,408
Posted By Gerald D
I think the trick is to get the "camera" as close...

I think the trick is to get the "camera" as close as possible to the line of the beam, so that one can probe deep profiles without the camera losing site of the spot. The closer the camera, the more...
Forum: 50. Toolheads Sat 05 June 2010, 20:52
Replies: 49
Views: 93,408
Posted By Gerald D
Dave, that laser does not have distance sensing. ...

Dave, that laser does not have distance sensing.

Here...
Forum: 50. Toolheads Sat 05 June 2010, 11:17
Replies: 49
Views: 93,408
Posted By Gerald D
PS. I didn't check other forums before starting...

PS. I didn't check other forums before starting this thread.....we may be trying to re-invent the wheel. But I doubt that this stuff is available "open-source" for Mach and EMC yet.
Forum: 50. Toolheads Sat 05 June 2010, 11:13
Replies: 49
Views: 93,408
Posted By Gerald D
No David, he doesn't. And he doesn't discuss his...

No David, he doesn't. And he doesn't discuss his method either.

Here (http://www.cnccontrols.com/laserprobe.asp) is a starting point of a commercially available system.
Forum: 50. Toolheads Sat 05 June 2010, 09:09
Replies: 49
Views: 93,408
Posted By Gerald D
Normand, your link doesn't work I get the...

Normand, your link doesn't work

I get the impression that the DIY folk interested in laser scanning are too fixed on the "projected_lines_plus_camera" methods like the "David" method. We folk...
Forum: 50. Toolheads Sat 05 June 2010, 00:38
Replies: 49
Views: 93,408
Posted By Gerald D
If you want to mount a simple laser scanner on...

If you want to mount a simple laser scanner on the MechMate, we can start another thread for that. :)
(there are some simple ideas that do work - simpler than the "David" style)
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