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down and dirty way edge and center finder for a CNC mach.

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Project by H_Stevens posted 08-31-2018 02:32 PM 684 views 0 times favorited 14 comments Add to Favorites Watch

Woodcraft sells this laser for use on drill presses. I mounted it to the z-axis on my CNC and can easily find the “ruff” edge of something and center the bit. It’s a down and dirty cheap way to do it. For general work it is great.

Sell for appox. $39 at Woodcraft. Its’ a deal. Well made unit too..item # 162567

-- Hamp, St. Simons Island, GA http://hampstevens.com/





14 comments so far

View dannmarks's profile

dannmarks

640 posts in 752 days


#1 posted 08-31-2018 04:19 PM

Love the idea for my milling machine.

View therealSteveN's profile

therealSteveN

1564 posts in 745 days


#2 posted 08-31-2018 04:51 PM

They are as good as you can mount, and aim them. Most issues come from a crappy set up, outside of that lasers are pretty sweet for aiming you at what you want to hit, doesn’t matter what that application is. So on a CNC, a firm mount, with an immovable base would be minimum requirement, as it is for any laser mount where you are looking for accuracy. Certainly no duct taping it on.

-- Think safe, be safe

View H_Stevens's profile

H_Stevens

25 posts in 216 days


#3 posted 08-31-2018 05:00 PM

I have this firmly mounted. Bolted to the carriage for the spindle. It’s great for a “Ruff edge” and “pointing a bit” If you want dead on you’d have to use a wiggler or some other edge finders. Using the arrangement I rigged up you can probably get with 1/16” but that is all. But sometimes that is close enough “Government Work”

This set up is perfect for a part you are going to cut out of a bigger piece and you just need a quick starting point. Plus it is relatively cheap. As I said in the original post, it appears to be well built. Made by Wixley.

Hamp

-- Hamp, St. Simons Island, GA http://hampstevens.com/

View robscastle's profile (online now)

robscastle

5380 posts in 2375 days


#4 posted 08-31-2018 10:28 PM

The product and concept is great. However with a drill press and or a Radial Arm Drill Press as the height of a drill press varies with every job so does the focal point of the beams. I looked at fitting one but decided against it due to constant adjustmment of the setup required for each application.
You need to fit the bit you are going to use then adjust the table to suit the job then adjust the focal point to provide the correct cross index each time, (wiggler) doing repetition work this would be a great aid.
I can see a better application with a fixed tool and a bed in a CNC thats for sure. (H_S)

They are great if you want to magnify any backlash in your drill!

Price wise its got the stars.

-- Regards Rob

View LittleBlackDuck's profile

LittleBlackDuck

2045 posts in 992 days


#5 posted 08-31-2018 11:29 PM


The product and concept is great. However with a drill press and or a Radial Arm Drill Press as the height of a drill press varies with every job so does the focal point of the beams.
- robscastle

Spoken like a young whipper-snipper…. when you get 69yo eyes (verging on 90yo after a few vinos) any assistance is a godsend. I always thought they wre a wank (similar reason as yours but not as scientific) but those laser lights now light up the pathway to my drill press. I love mine (on the DP).
Let’s give those little red electrons a life to look forward to.

Now back to the topic… no idea how they fare on a CNC but I guess it’s more of an assistance than a hindrance and congrats for the concept.

-- If your first cut is too short... Take the second cut from the longer end... LBD

View mcoyfrog's profile

mcoyfrog

4498 posts in 3765 days


#6 posted 09-04-2018 02:34 PM

Kewl info, thanks

-- Wood and Glass they kick (well you know) Have a great day - Dug

View H_Stevens's profile

H_Stevens

25 posts in 216 days


#7 posted 09-04-2018 09:13 PM

Think of the laser lines as intersecting vertical planes that are each perpendicular to the X-Y axis. The Z axis is always perpendicular the X-Y axis. As the Z axis moves up and down the intersecting laser lines always stay in the same place relative to the X-Y axis. Hence, the movement up and down has no effect on location.

The rig I made, is not perfect but it is close enough for government work. Finding a dead on true edge would require a “wiggler” or some similar device.

h.s.

-- Hamp, St. Simons Island, GA http://hampstevens.com/

View LittleBlackDuck's profile

LittleBlackDuck

2045 posts in 992 days


#8 posted 09-04-2018 10:43 PM


The rig I made, is not perfect BUT it is close enough for government work.
- H Stevens

You had me on board at first HS... however, it’s that attitude close enough for government work that is screwing us all up… I feel you should have left the words ”government work” on your shop floor!

While lately our governments are a joke… I’d rather not hear about what they are fed that gets redirected back to us…

-- If your first cut is too short... Take the second cut from the longer end... LBD

View H_Stevens's profile

H_Stevens

25 posts in 216 days


#9 posted 09-05-2018 02:02 PM

Hey LittleBlackDuck,

It’s just a saying. Lighten up, it was a joke.

-- Hamp, St. Simons Island, GA http://hampstevens.com/

View LittleBlackDuck's profile

LittleBlackDuck

2045 posts in 992 days


#10 posted 09-05-2018 03:39 PM



Hey LittleBlackDuck,
Lighten up, it was a joke.

Hey HS, I’m alight,

unless there is a restriction on joke crackers…

-- If your first cut is too short... Take the second cut from the longer end... LBD

View robscastle's profile (online now)

robscastle

5380 posts in 2375 days


#11 posted 09-09-2018 12:03 AM

LBD no doubt that was the refined reply !!
Government work!? ... they all need to be sent to the showers!

If I find out which one let females into Bunnings so they can talk SWB to the check out chicks whilst holding everybody else up I will shower them personally!

Anyway on a more interesting matter if what H_S states about the beams having a triangular aspect it may work, I was thinking more like beams of light focused on a point as was fitted to the Avro Lancasters.

-- Regards Rob

View LittleBlackDuck's profile

LittleBlackDuck

2045 posts in 992 days


#12 posted 09-09-2018 12:32 AM


..... I was thinking more like beams of light focused on a point as was fitted to the Avro Lancasters.
- robscastle

I belive H_S is correct in his summation (something I never analysed)... However, if my triangles stop working I will Chastise it with a barrage of over sized ball bearings.

-- If your first cut is too short... Take the second cut from the longer end... LBD

View robscastle's profile (online now)

robscastle

5380 posts in 2375 days


#13 posted 09-09-2018 12:35 AM

Just took a look at Stewie Lees video and then later found this.

https://www.youtube.com/watch?v=9cueVxBwqwc

Makes it all very clear now.

Yes H_S is correct !!

-- Regards Rob

View LittleBlackDuck's profile

LittleBlackDuck

2045 posts in 992 days


#14 posted 09-09-2018 12:49 AM


... Yes H_S is correct !!
- robscastle

It’s nice to see someone admit they were “wrong”... if only we could teach that to politicians!

Science aside… I still love my laser…

-- If your first cut is too short... Take the second cut from the longer end... LBD

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