Re: 3D Scanner/ Digitizer
Posted by
Andrew Werby
on 2004-04-18 19:56:13 UTC
Message: 19
Date: Sun, 18 Apr 2004 22:51:01 +0200
From: "Henrik Olsson" <henrik-olsson@...>
Subject: Re: Re: 3D Scanner/ Dizitizer
Hi,
I'm just doing a project at work using a laser displacement sensor from DSE
(Danish Sensor Engineering, i think) It measures from 100mm to 300mm with
0.01mm resolution. It measures with a frequency of 2000Hz and spitts out the
data at 115kbaud. It also has various internal average-routines and 'false
reading skipping'. Very easy to use windows .dll to use in your own
software, which I do (VB).
I have this dream, when the project is over, to borrow the sensor, put it on
my machine and use Mach2 to play a bit with 3D scanning.
The downside is the price of the sensor. 40.000SEK, about $5.000.
/Henrik Olsson.
[One major problem with mounting a laser rangefinder on the CNC spindle
seems to be vibration. The one fellow I know of who tried this reported that
he couldn't get a good reading on a point until the machine had come to a
halt and the residual skaking of the machine had died down. Obviously, that
would slow things down quite a bit, since a detailed scan records many
thousands of points. He was experimenting with an earlier version of the
LaserRanger http://www.aculux.com/LaserRanger.aspx, a small unit which costs
about $1000. Perhaps the current version (or some other more expensive unit)
would have a better response time and the ability to capture points on the
fly. It would still need a program to control it and record the data it
collected in a useful form. The software would have to be able to move the
sensor along a variable grid path in X and Y, and also move it up and down
to keep within the sensor's range.]
[Mach2 (www.artofcnc.ca) , is an inexpensive Windows-based CNC control
system which has been developing rapidly and has an enthusiastic following
around here. It has been written to support basic scanning, but a
plug-and-play link to the laser rangefinder hasn't been implemented yet, as
far as I know. The data-collection function still has to be written, as well
as the hooks to the specific units being supported. If enough people start
clamoring for it, this might happen sooner- that's the way the development
process seems to work over there. Maybe it could be a plug-in to Mach2, or
someone could put out a special OEM version that supports this. Putting some
of those averaging and noise reduction algorithms in there as well sounds
like a good idea to me. ]
Andrew Werby
www.computersculpture.com
Date: Sun, 18 Apr 2004 22:51:01 +0200
From: "Henrik Olsson" <henrik-olsson@...>
Subject: Re: Re: 3D Scanner/ Dizitizer
Hi,
I'm just doing a project at work using a laser displacement sensor from DSE
(Danish Sensor Engineering, i think) It measures from 100mm to 300mm with
0.01mm resolution. It measures with a frequency of 2000Hz and spitts out the
data at 115kbaud. It also has various internal average-routines and 'false
reading skipping'. Very easy to use windows .dll to use in your own
software, which I do (VB).
I have this dream, when the project is over, to borrow the sensor, put it on
my machine and use Mach2 to play a bit with 3D scanning.
The downside is the price of the sensor. 40.000SEK, about $5.000.
/Henrik Olsson.
[One major problem with mounting a laser rangefinder on the CNC spindle
seems to be vibration. The one fellow I know of who tried this reported that
he couldn't get a good reading on a point until the machine had come to a
halt and the residual skaking of the machine had died down. Obviously, that
would slow things down quite a bit, since a detailed scan records many
thousands of points. He was experimenting with an earlier version of the
LaserRanger http://www.aculux.com/LaserRanger.aspx, a small unit which costs
about $1000. Perhaps the current version (or some other more expensive unit)
would have a better response time and the ability to capture points on the
fly. It would still need a program to control it and record the data it
collected in a useful form. The software would have to be able to move the
sensor along a variable grid path in X and Y, and also move it up and down
to keep within the sensor's range.]
[Mach2 (www.artofcnc.ca) , is an inexpensive Windows-based CNC control
system which has been developing rapidly and has an enthusiastic following
around here. It has been written to support basic scanning, but a
plug-and-play link to the laser rangefinder hasn't been implemented yet, as
far as I know. The data-collection function still has to be written, as well
as the hooks to the specific units being supported. If enough people start
clamoring for it, this might happen sooner- that's the way the development
process seems to work over there. Maybe it could be a plug-in to Mach2, or
someone could put out a special OEM version that supports this. Putting some
of those averaging and noise reduction algorithms in there as well sounds
like a good idea to me. ]
Andrew Werby
www.computersculpture.com
----- Original Message -----
> Hi,
>
> I have been looking at ways to speed up digitizing, as using a a
> probe is so slow and really wears out the z axis if you are doing a
> lot of deep or large objects.
>
> I have hand held laser measuring equipment which Might do, it costs
> around £250 uk pounds.
>
> I have taken it to peices and was wondering if anybody on this site
> would now how to tap into the information that is sent up a flat
> ribbon conector to lcd digital readout. If this can be done it would
> be easy to divert the signals to the pc witha simple connector.
>
> I will attempt to post some pictures in the photos section.
>
> Thanks
>
> Remo.