ShapeOko inspired CNC by Northbear

Re: ShapeOko inspired CNC by Northbear

Postby northbear » Fri Dec 20, 2013 3:03 pm

LTMNO wrote:Very Nice looking machine... well done!


Thanks! I have to say the extruded aluminum bed on your build (viewtopic.php?f=5&t=1381&start=80#p17942) is impressive!
My buildlog is here
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ShapeOko inspired CNC by Northbear

Postby LTMNO » Mon Dec 23, 2013 1:21 am

Thanks. Haven't been able to use it yet. Will do after the holidays. I bought clamp downs from amazon. Wrong size. Need to build some custom clamps. :-(
ShapeOko #1508, TinyG Controller, Dual Y, ACME Z-Axis, MeanWell(S-350-24v), NEMA 23's, 1m Squared t-slot table, OpenRail and the Original Z Makerslide and all Motor Plates...
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Re: ShapeOko inspired CNC by Northbear

Postby northbear » Tue Apr 28, 2015 1:36 pm

Had a question on the settings for my electronics some of which I had listed http://www.shapeoko.com/forum/viewtopic.php?f=34&t=2119 so I thought I would add post here so I could find it again if needed

As a reminder, I am using individual singe axis TB6560 drivers from e-bay with a breakout board with LinuxCNC. The motors on x and y are NEMA 23 57BYGH104 from Circuit Specialists and the Z axis is NEMA 17 25253-01 from Inventables.

On the drivers I am using the following settings:
driver settings.PNG
driver settings.PNG (9.95 KiB) Viewed 1382 times


In LinuxCNC The step and direction settings are:
step and dir.PNG
step and dir.PNG (3.04 KiB) Viewed 1382 times


I measured my Jitter as 25000 (don't just use this value! measure it for yourself when using LinuxCNC!)

On my Breakout board I wires as shown below: the "My breakout board" column is what is labeled on the board itself and the "Mill" column is what I setup in LinuxCNC.
pinout.PNG
pinout.PNG (16.75 KiB) Viewed 1382 times
My buildlog is here
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Re: ShapeOko inspired CNC by Northbear

Postby northbear » Tue Apr 28, 2015 1:39 pm

And here is some mechanical setup information for my own reference

steps.PNG
steps.PNG (7.21 KiB) Viewed 1381 times


work area.PNG
work area.PNG (10.87 KiB) Viewed 1381 times
My buildlog is here
northbear
 
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Re: ShapeOko inspired CNC by Northbear

Postby northbear » Wed Jan 27, 2016 9:56 pm

Replaced the breakout board which went bad. More information here: viewtopic.php?f=4&t=7499
My buildlog is here
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Re: ShapeOko inspired CNC by Northbear

Postby northbear » Sat May 26, 2018 3:21 am

Been a while since I have posted, but recently I made a few updates to my CNC.

First update was to my dust shoe.

My first dust shoe was never really designed to be permanent and was showing it's age (aka falling apart!). I have also always liked the idea of fixed z height dust boot so I designed one up quite a while ago and finally got around to building it! Sheet metal part was made by a fab shop friend, the tube, adjustable teardrop handle and brush were purchased and all the other parts were made by me on the CNC (with help from the drill press and table saw).

Tube clamps were made on the CNC out delrin. Holes were drilled in the end and side with the drill press and tapped to a M5 thread by hand
Clear lexan piece was made on the cnc and used LOCTITE® PLASTICS BONDING SYSTEM http://www.loctiteproducts.com/p/sg_pls ... System.htm to attach the brush (actaully a door sweep) to the lexan.

I have used it just a couple of times but it seems to work well. Maybe seals a bit *too* well in that it almost suctions down to the workpiece.

Second update was to add a z axis touch off plate.
I *really* like it. As I am using LinuxCNC I followed the guide here - http://7xcnc.com/software/probing/z-touch-plate/ Only changes I made from the directions were to add G20 to the beginning of the 100.ngc code, changing so the units to inches and setting the correct distance for the touch off plate. (see code below)

Code: Select all
<pre>
o100 sub
G20
( Set current Z position to 0 so that we will always be moving down )
G10 L20 P0 Z0
( Probe to Z-10 at F25 [Uses machine units, I work in mm, this is meant to be slow!] - CHANGED MINE TO INCHES -  )
G38.2 Z-.5 f.8
( Set Z0 at point where probe triggers with offset of +1.47 [this is the thickness of my PCB plate. You must adjust this for your plate / setup] - CHANGED MINE TO MEASURED PLATE THICKNESS IN INCHES)
G10 L20 P0 Z0.591
( Rapid up to Z10 above the material - AGAIN CHANGED MINE TO INCHES AND MADE LARGER SO IT WOULD BE ABOVE THE PLATE)
G0 Z.75
o100 endsub
</pre>


I sanded the plating off an old heatsink (the plating was not conductive) to use for the tool touch off and used a bolt and a magnet with a c'sunk hole to attach to the nut on the router.

Pictures below probably better show the upgrade.
DSCF1498.JPG
DSCF1498.JPG (709.59 KiB) Viewed 131 times

DSCF1497.JPG
DSCF1497.JPG (716.08 KiB) Viewed 131 times

DSCF1502.JPG
DSCF1502.JPG (671.51 KiB) Viewed 131 times
My buildlog is here
northbear
 
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Re: ShapeOko inspired CNC by Northbear

Postby northbear » Sat May 26, 2018 3:25 am

Couple pictures of the touchoff plate, linuxCNC button (upper right hand corner), as well as a picture of my grounding wire on the inside of the tube. Have had trouble with static in the past so wanted to try to prevent static buildup.

DSCF1500.JPG
DSCF1500.JPG (607.91 KiB) Viewed 130 times

DSCF1501.JPG
DSCF1501.JPG (307.21 KiB) Viewed 130 times

DSCF1499.JPG
DSCF1499.JPG (681.38 KiB) Viewed 130 times
My buildlog is here
northbear
 
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Re: ShapeOko inspired CNC by Northbear

Postby Johnywalter » Fri Jun 01, 2018 11:02 am

@northbear
With one drill press you use?I mean model.
This so accurate.Must be something good and quality for this work. ;)
Jon
Last edited by Johnywalter on Fri Jun 01, 2018 8:32 pm, edited 1 time in total.
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Re: ShapeOko inspired CNC by Northbear

Postby northbear » Fri Jun 01, 2018 2:30 pm

Jon,
Drill press is nothing special but gets the job done. It is just a cheap harbor freight bench drill press. This is the model: https://www.harborfreight.com/8-in-5-sp ... 60238.html
My buildlog is here
northbear
 
Posts: 252
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Re: ShapeOko inspired CNC by Northbear

Postby Johnywalter » Fri Jun 01, 2018 4:26 pm

northbear wrote:Jon,
Drill press is nothing special but gets the job done. It is just a cheap harbor freight bench drill press. This is the model: https://www.harborfreight.com/8-in-5-sp ... 60238.html

Thanks!
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