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Messages - wild.bill

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1
General Discussion / Re: Making money
« on: July 18, 2017, 05:32:51 PM »
...
Incidentally, I'm surprised there has been such a market for the slate coasters. Who uses coasters? I don't remember the last time I used one!

I use one every day. My coffee cup sits on it every day, and my beer mug sits on it every night.
If the slate starts to get dirty or sticky a little soap and water cleans it up like new.

2
Custom Size Frames / Re: Little CNC mill
« on: July 16, 2017, 07:13:04 PM »

I will put out a few thoughts that I hope can help a little. For GRBL I have been using 1.1e configured to have X and Y limits on different pins. I set the Z height manually by placing a piece of paper on the surface and adjust height until it just stops letting me move the paper.

For raster I have only been using T2 and it has worked out well. Something I did when I was setting things up for raster and just issuing the GRBL commands and seeing that everything moved as expected. The only warning here is if you use the arrows for moving in T2 its leaves the machine in relative positioning mode. I set up two control buttons to set absolute or relative positioning modes.

With the fine bits that I am using it is a very slow process. I am often cutting at 50 - 80 mm/min. This leads to an idea for a future upgrade for Z2. It would be nice to move at the rapid feed rate when we know that we at the Z-safe height. That would make the raster a lot faster.

For vector - I will use T2 for very simple DXF files, but most of the time I use ESTLCAM to setup tool paths, export the "nc" files and then I use GrblPanel to control the machine. ESTLCAM will take SVG, DXF and STL files.

For bits I have a huge range, but I have broken my .3mm and .5mm bits. I was using a 1mm (that didn't break easily) but it was a little course for what I was trying to achieve. Most of what I an doing this week has been with a 20 deg and a 15 deg V-bit. As long as its shallow I can get some very fine cuts without the fear of breaking the bits. I still need to get some ball end bits.

With the talk in another thread about Topo maps I was reminded that I had 3D printed a topo and went looking for the STL. I loaded it into ESTLCAM and created the nc files to cut it. All I had was sharp edged 3mm bits for someting this large and a ball end would have done a much better job.


3
T2 Engraving / Re: Alarm?
« on: July 16, 2017, 06:09:34 PM »
Something to keep in mind, the Alarm comes from GRBL. When this happens T2 or any other software has no idea if the last move command was executed or not so I would never assume that you can never just continue and expect it to still be aligned with what had already been done.

4
Custom Size Frames / Re: Little CNC mill
« on: July 12, 2017, 02:52:45 PM »
I have had a few of those deep dives with mine. Once while doing aluminum I forgot to turn the spindle speed up and the force pushed every thing down deeper and deeper until the bit broke, couldn't get to the abort fast enough.

Did it with wood once because I had to fast a feed rate but aborted before anything broke.

There is a learning curve and my two machines are much different on how to set them up and what material you can cut, but that is part of the fun.

5
Custom Size Frames / Re: Little CNC mill
« on: July 12, 2017, 12:30:43 PM »
When I am engraving in acrylic I usually only cut .1mm deep into it. The picture I posted yesterday was only cut .1mm deep.

I have a 1/2" mill bit that I used to do a light cut into the waist board and then you know that there
is no skew between the bed and the head.

6
Projects / Re: Fine engraving with laser and CNC
« on: July 11, 2017, 04:29:27 PM »
I am home again for the week so I picked up testing out the CNC features some more. My original goal was to use T2 to engrave raster images into clear acrylic. I would never have expected that laser software could do the following image with a CNC machine. The image was cut using a 20deg V-bit into some scrap acrylic so the image is only 40mm high. I am sure if I was doing a larger image it would be even more refined.

And I did put a light on the edge of the acrylic to take the picture.


7
Aliexpress.com / Re: Mini CNC
« on: July 04, 2017, 06:49:19 PM »
I happen to use a Makita router at 16K,

but another thing to keep in mind is what kind of bit you are using.
A single flute bit needs to run faster than a 4 flute bit.
And for aluminum I usually use a good quality single flute bit.

8
Aliexpress.com / Re: Mini CNC
« on: July 03, 2017, 10:15:58 AM »
i don't think the spindle is fast enough or strong enough for aluminum.
i run my router at almost twice its speed when doing aluminum.

i do very much like the spindle for smaller things like engraving and fine etching. On mine i took off the pot and hooked up a pwm to 10volt board and control the spindle via grbl/t2

9
Aliexpress.com / Re: Mini CNC
« on: July 03, 2017, 07:55:55 AM »
that looks like the spindle that i use. it need a power controller for the motor.
take a look at this one https://www.amazon.com/gp/product/B01LNBOCDA/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

11
Assembly Help / Re: Stock Eleksmaker laser height.
« on: June 25, 2017, 06:44:24 PM »
I made longer legs for my Eleksmaker out of acrylic. I did them on the CNC so all I have is a DXF file but with most cad programs you can add height to them so you can 3D print them.
If I find time I will see if I can make an stl file if that is what some one wants.

12
T2 Engraving / Re: Alarm?
« on: June 23, 2017, 03:45:35 PM »
It can also be caused by to small a power supply. I had this problem and at least one other person in the forum solved the problem by going to a larger power supply.


13
T2 Software Updates / Re: Updates
« on: June 23, 2017, 09:14:50 AM »
Looking good, I have been testing out the CNC mode using a raster image (jpg) and cut small - 60mm wide.

Using a v bit and a .2mm deep cut I got the following image. The cut is a little wide using the V-bit and can't wait to get my small one's later today. But this is the best I have ever been able to engrave from an image with the CNC machine.

14
T2 Engraving / Re: Can't control laser w/Mana SE board
« on: June 22, 2017, 04:46:40 PM »
So I ordered a new Mana SE board from EleksMaker and it arrived today; no bueno.  Exact same behavior as before (laser on full blast all the time).  I'm going to order a 2500 mW laser from Eleks and see if that works.  I'm figuring I have zero chance of getting a replacement laser from BangGood; irritating to think I have a 5500 mW laser that won't work properly (unless I want to burn holes in stuff).
Do your self a favor and don't spend money yet.

Get a small 12V bulb and a 6V bulb and wire them up like the laser. 12V bulb between + and -, and the 6V bulb between S and -. Then make sure that you can control the 6V bulb from the controller. With this setup you can test everything in the system to make sure its all working properly without actually having a laser hooked up and a lot safer.

If the bulbs work properly and the laser does not - then it time for a new laser, but not until then.

15
T2 Software Updates / Re: Updates
« on: June 22, 2017, 03:32:40 PM »
The timing is good, I liked the results I was getting with the previous beta code so I ordered a full set of very small bits for the CNC .6mm - 1.5mm and they should be here tomorrow afternoon (go to love Amazon Prime). Hope to have some nice results to show soon.

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