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Messages - wild.bill

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1
General Discussion / Re: motor is blocking
« on: January 22, 2017, 02:19:54 PM »
All is working on a laser 30x40 but the motor is blocked if it is not in use for a while (1-2 hours) it really stuck and i have to give a turn to the pulley with a. plier to unblock it ....seems like inside the motor is stucked....sorry for my bad
English...

I have never seen anything like that but sounds like it could be the motor. After you get the new one take it apart and see what you find. Something could be broke and hanging up, but what you describe does not sound normal.

2
General Discussion / Re: motor is blocking
« on: January 22, 2017, 10:37:36 AM »
So i have my left Y motor blocking i can get it to work again with unblocking it with pressure and it works but if the laser is of few hours the motor is blocked again .....can i repair this ? Of course already ordered a new pair of nema 17


Kindly Maurizio

Not enough information to even guess,

* is the motor on a laser cutter and if so what kind?
* I can only assume that you are trying to drive either the X or Y axis. on something
* Does the motor work when disconnected from the belt?
* Have you adjusted the voltage on the stepper drivers?
* is something binding on one of the rails?
* if the gantry has wheels - are they set to roll correctly?

It might not be the motor at all but there is not enough information to tell, and my crystal ball is a little dirty today.

3
General Discussion / Re: Rails ?
« on: January 19, 2017, 07:08:50 AM »
FYI - I have purchased rails from Folger a number of times, and they do match what you get from Banggood.

Another thing is they are very easy to cut to length if you have a table or miter saw. HD has an 80 tooth blade that is designed to cut aluminum.

http://www.homedepot.com/p/Diablo-10-in-x-80-Tooth-Non-Ferrous-Plastic-Cutting-Saw-Blade-D1080N/100043779

4
General Discussion / Re: inkscape export
« on: January 18, 2017, 05:34:26 PM »
I have some files in svg format that I would like to convert to dxf. I open and display the files ok in Inkscape 0.91. Then I save as "dxf". The files get saved but the units are off. 10mm  exports as 2.82mm. The ratio is 3.54 which I recall is the pixel to mm at some standard ppi.

You can cheat the way I do. Everything I do in Inkscape (0.91) I save the ".svg" file and then open the ".svg" file in qcad to create the ".dxf" file.

5
General Discussion / Re: Rails ?
« on: January 18, 2017, 02:42:39 PM »
Make sure the opening between the rails is 6mm. Some of the 20x20 is less than 6mm meaning you will have to move down Gt2-5mm belt.

Misumi USA has the correct rail for our machines.
https://us.misumi-ec.com/vona2/mech/M1500000000/M1501000000/M1501010000/
The rails from Folger are OK. I got some from 2080 a while back and they were less than the 6mm.

6
General Discussion / Re: Rails ?
« on: January 18, 2017, 01:57:27 PM »
I used a 2080 for the Y axis on my custom i3.
Might feel like a strange place but I get a lot of rail's from Folger https://folgertech.com/collections/frontpage/products/2020-20mm-x-20mm-x-1meter-extruded-alumium-beam-for-kossel-diy-projects

7
General Discussion / Re: RAMPS boards with laser cutters.
« on: January 18, 2017, 01:30:54 PM »
The design of my new system has a heavy Folger influence. I have their 2020 i3 that is all original, a 2020 i3 and I guess the best I can say is the frame is original and that is all. And last of the 3D printers is a Folger FT-5 which is a BIG beast.

The new machine is using the design concept from the FT-5 for X and Y. The Y is almost the same as theirs and X is a heavier stronger design that I an put a Z system onto (don't have that design yet).

I think it will be a couple more days and when I have it all together I will get some pictures of it.


8
General Discussion / RAMPS boards with laser cutters.
« on: January 18, 2017, 12:53:01 PM »
I wanted to start a new thread for this topic so it would not get lost in another thread with a totally different meaning. I will be a little long winded here - and as a side not I hate computers. I had this all written and while reviewing it - it went poof and I had to start all over.

So to start the RAMPS board is just another controller board that is designed to run stepper motor's and control stuff. The most often used software for this board is Merlin and together their main focus is on 3D printers. It has an implementation of the GBRL protocol that is a little different than what we are used to because its focused on heat beds and hot ends and does not have spindle commands. I don't have the link but somewhere on git there is a document on the GBRL protocol and which commands are supported by the different implementations.

One of the features that Merlin has which many people like is the LCD/SD card support. With this you can control the 3D printer (or anything else) using GCode off the SD card so no computer needs to be connected. This is the only way that I do my 3D printing. To answer a question that I have seen many times is can GBRL 1.1 support an SD card? The answer is yes it could BUT someone would need to do a lot of coding to make it work so I don't expect to see it in the near future.

There are several way's that a laser can be hooked up and controlled by a RAMPS board. If you have a 12V/PWM laser you can connect it to the parts cooling port. Merlin has commands that let you control the port from 0 - 255 PWM setting. This is where the M commands and P vs S come into play. If you have a TTL laser you can still make this work by changing the port to a different data port that has a 5 volt pin available. NOTE: the details are left to the user to implement.

Taking a look from the other side there are many new laser enhancements that have been added to GBRL 1.1 that are not likely to be put into Merlin because it does not help 3D printing. So the short summary here is that GBRL 1.1 and Merlin are to completely different implementations of control systems using the GBRL protocol - with many differences.

I have not had time to look yet to see if there is a GBRL 1.1 implementation that will work on the RAMPS board. I know there is a branch of GBRL for the MEGA but have not seen that there is a pins file that supports the RAMPS board. A future project for me.

So how did I get here? I am just finishing building a new laser/CNC platform and I need to decide what controller to use. I have RAMPS, MKS, CNC Shield, and a collection of E boards.
Most of the work that I do is etching so the improvements in GBRL 1.1 are very important to me (and why I have not installed the RAMPS board yet). But there are times when I have a long multi-pass cutting project that I would like to have the SD card for rather than tie up a computer for a long time. With what is available know I think the best that would work for me is having two different firmwares that could be loaded depending on the type of project I am working on because I don't expect any firmware that will do it all in the near future.

thoughts? (and I will use edit to fix things because I am not going to preview again)

Bill

9
General Discussion / Re: Closed loop Nema17
« on: January 18, 2017, 11:37:53 AM »
I have some things to say about using the RAMPS board with a laser system but it will get lost in this thread. I will start a new topic in a few minutes with my comments.

10
General Discussion / Re: hi all newbie here
« on: January 16, 2017, 10:04:52 AM »
Pull the stepper drivers out of the board and everything else should come back. They like to drag the 5V down when they fail. If so its cheap to replace the driver compared to the rest of the system.

11
Cutting / Re: Cutting foam board
« on: January 14, 2017, 02:38:23 PM »
I just tried...using a 1.6w laser, speed mm 100, 100% power...12 passes I can get about 80% through but not all the way.
The way I cut this foam is one pass with the laser, and the second pass is with the X-acto knife. The only way I have seen that works every time.

12
glad i didnt install the upgrade!

Agree - I am so happy I did not upgrade.

I seldom upgrade any software that I have working for at least 2 weeks after it comes out. I would rather let someone else find the bugs.

13
Trouble Shooting / Re: Cant open dxf file in T2 Software , any ideas?
« on: January 12, 2017, 09:05:00 AM »
i am trying to use this file so i can cut a cardboard. when i import to t2 dimension is wrong.i exported the file using mm and tried all advanced settings in t2laser. i need 205 x185 mm size. t2 makes a 205x127 mm file.

When I load this file into inkscape it is 205x127. You will need to adjust the size in what ever program you are creating it with.

14
Projects / Re: Text engraving on 3/8 thick clear acrylic
« on: January 11, 2017, 07:07:18 AM »
I tried about 20 different methods yesterday (lots of failures and some just OK) and I am back to the method that you used. The only difference is that I am using a black craft paper because it works much better than the copy paper that I was using a few day's ago. Also the easiest to use - just put the paper down, focus, put the plastic on top and cut away.

I am using the 2.0W TTL laser and I also ended up at 100mm/min to 110mm/min for the speed. By far this is where I was getting the sharpest images. Any slower and it starts to over melt the edges and burns the paper enough that it starts to be work to get the paper off.

15
General Discussion / Re: Desktop laser engraving plexiglass
« on: January 10, 2017, 05:59:58 AM »
Again we are into an area that no one has tried things. All I can suggest is to try things to see what will work and what won't - then let us all know. There is a little cost in material but so much knowledge can be gained by just trying out an idea. Don't wait for others - try it your self.

With the glass I had at least 10 failures before I thought about and tried the black paint. I can think of at least 12 more possible ways that "might work".

The one that I plan to try today is BLUE tape painted black on GLASS, might work might not. Yesterday I tried BLUE tape on glass that was sprayed with water and would say it worked fair but I was not really happy with the results.



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