Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Chris.Botha on June 21, 2011, 05:25:20 PM
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Hey duders..
been a while.. i finally sold my lame-ass mdx-15.. then typically just after i sold it I started to need touch probing.. >:( :o
Someone posted a probe video on 3dcadjewelry
http://www.youtube.com/watch?v=kAHTxzzz91A
which looks like it could do the job? It is running on mach, so will this have the resolution i need? 0.1mm (thats 0.004th for you yankeedoodles stuck in the 18th century..
i would double that at 0.05mm (0.002) but i will settle at 0.1
anyone have info on this? What probe is it, is it good enough, is there better (but still affordable)
(i did try search but info is sporadic and broken up, maybe i was using my "man eyes" as my wife says, if a cohesive thread on this exists, my apologies)
my googling turned up this.. interesting looking project..
http://www.muellerr.ch/engineering/scanner/default.htm
(http://www.muellerr.ch/engineering/scanner/scanner.jpg)
(http://www.muellerr.ch/engineering/scanner/samples/2sfr/2sfr.jpg)
he is achieving 0.15mm but so slow I would die of old age before an average scan was done...
regards
Chris
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Chris it ALL depends on what you plan to use it for and how often are you going to us it. You usually get what you pay for. To do high detail probing it takes a LOT of cycles to get it done. IF it is extreme detail then you use a very fine tip and even MORE cycles .
IF it makes you money you may want to find a commercial duty probe. They normally will run millions of cycles without problems. If you "can" get one with the overtravel switch to protect your investment. Mach hase been known to eat a probe every now and then by not stopping when it should.
The overtravel switch hooks to the liimts circuit and trips IF the probe miss cues and does not stop. EVEN more important IF you are going to fast cycle the probing routines.
The process is about as exciting as watching paint dry. (;-) TP
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:)
i want to spend 50 dollars and have it scan at 0.01mm in 5 minutes ;)
realistically speaking.. I dont scan that often and usually its only a small area, not much bigger than the coin above (im a jeweller, thing ring size) so i do need high detail, 0.05 or better would be nice. My last scanner (mdx-15 piezo) would scan an onject that size at a xy pitch of 0.1mm in about 4 hours. 0.05 in 8 hours. this is not an issue, my lovely wife would put it in the mornign and by time i get home its odne..
BUT
that was on a seperate machine, the mill is primarily used to also produce my waxes.. so i cant have it offline for 8 hours.. a faster solution required..
any input welcomed :)
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this any good?
http://www.cadcamcadcam.com/probe-tp100probe.aspx
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YEP I have one of those too along with a $1800 renishaw. It works very well .
It normally returns inside of .001" and has did .0002" depending on the probing speed. Note that it does not have the safety overtravel BUT I have not been able to break it yet and MACH has tried a time or two.
It is a nice little hobby probe.
Better Price :
http://cgi.ebay.com/TOOL-PRESETTER-CALIBRATION-TOUCH-PROBE-/150589666131?pt=LH_DefaultDomain_0&hash=item230fd7f353
(;-) TP
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the probe above works great.
love your work
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K thanks all... got the bank onto it.. sometimes she lets me buy toys :)
(i woudl have to grind that probe point down a bit tho.. and reason not to, will damage summing inside it.. bear in mind, by grind im referring to refined jewellers diamond discs.. not an actual grinder.
Thanks Tramalot :)
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Chris,
Have you looked into laser scanning. One of them uses a web cam and then pieces the scan via some software.
The software was around $500.
There is a small portable comercial laser scanner that you can use along with a rotary table. I think the scanner along with software was around $2000.
The end results were around 0.003" but that depended on distance and think it was 12" away.
Just an option to consider.
RICH
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Chris you can BUY very small diam tips, all the way down to a needle point for the probes(;-).
Will you do this on the XY (flat on the table) or XA/Z in the rotary axis ?
Just curious, (;-) TP
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Hi Chris,
Do you think something like this could be adapted to smaller scale higher precision work ? http://www.vectric.org/labs/index.php/laboratory/item/get-kinected-to-your-cnc
Tweakie.
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K thanks all... got the bank onto it.. sometimes she lets me buy toys :)
(i woudl have to grind that probe point down a bit tho.. and reason not to, will damage summing inside it.. bear in mind, by grind im referring to refined jewellers diamond discs.. not an actual grinder.
you can get different tips, extensions. 1mm dia is the smallest I believe . http://www.cadcamcadcam.com/contactprobe.aspx
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ps. the 1mm does an american quarter nicly in 1 to 4 hours. depending on settings
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It will work great on a flat type surface BUT if the surface is very rounded the tip may tend to slide off the SLOPE at the contact point before the probe trips and not give a true profile to the .001" accuracy. It may alter the actual profile a touch.
IF MACH had the inverse probe option G31.2 (Trip on reset instead of trip on contact) this would not be a problem.
But is is what it is.
So it all depends on your perspective of accurate (;-)
(;-)TP
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@Rich, i did look at laser scanning, not high enough resolution, plus i work with jewellery, reflection is always an issue and the steep wall inclines tended to "stripe" I only ever used david laser scanner tho, not sure if a dedicated system would pay itself off..
@br549, i would like to able to do both actually...
@tweakie.. i have kinect and wii and love both.. but the res is a little low.. at the risk of being politically incorrect, this is what i love my wii for the most..
http://www.youtube.com/watch?v=JDPbonFZECI
my wife just shakes her head...
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These will be supper in the next year or 2. They go to the creek when the lake freezes.
As far as bambi goes, oh well. I broke my back in a motorcycle accident because of over population. But that led me to cnc and here so it kinda evened out.
Happy summer/winter
http://www.youtube.com/watch?v=WKsMiPg5ZTg&feature=youtube_gdata_player
Sent from my ADR6350 using Tapatalk
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Chris,
politically incorrect
At least I know you'll never starve in the virtual world. ;) :D ;D
RICH
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kinect scan. its a picture on top of a depthfield of the bear, i think? anyway, vid is small, but the bear is actually not bad..
it gets you to place the bear (any toy) close to the camera and then hold it still while it (scans infrared/passive depthfield)?
turn bear around line up the edge then scans the back.. the output model is lowpoly, bit lumpy but not bad.. this particular incantation of the program sticks googly eyes on it then maps the bear movements to your body movements, bit silly but i do see application of the technology in the future.
http://www.youtube.com/watch?v=KAdSi7WnWJ4