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Topics - kibodwin

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Mini CNC / Idea to set constant z axis bit hight?
« on: May 14, 2021, 06:31:25 PM »
Hi guys,
An idea poped into my head..and it sounds like a good idea but maybe I am missing something and you can set me straight...
So in order to get constant z axis bit hight I thought to use a metal block of a specific hight. The top  of this block would be the z axis zero. This would allow constant zeroing of the bit on tool changes.
As long as the top of this block is higher than the top of the material (and you don't rise the z axis higher than physically possible in your gcode then I can't see why this wouldn't work.
The X/Y axis have endstops so no need for a touch probe.
All of this came about from me wanting to run roughing passes and therefore needing tool bit changes. I needed to find a way to keep the z axis bit zero constant and this idea felt like is solved this issue.
I have a mate with a cheap 3018 CNC and this could work for him also...?
Maybe it is not a new idea but it is to me!!!

General Discussion / cnc lofi!
« on: April 13, 2021, 01:04:25 AM »
Hi guys,
Its been a very long time (far too long, I was away for several reasons but things are looking up) and I now have the strength and time to get back into lasering and get my diy cnc going. In looking for inspiration I found this, 'cnc lofi'. I listen to lofi tunes on spotify as easy listening but found it funny that there is a 'cnc' version.
I will update with any progress I make but right now outside of work I am concentrating more on the cnc than the laser (the Co2 laser seems to have lost its power, hope I dont need a new tube)
Enjoy, I hope all is good with you all.

I hope you are all doing well in these complicated times.
Having recently taken up the challenge of owning a dog, I was wondering if users here could suggest a good dog forum. I ask as I have a few questions I would like to ask. For ex; my 15Kg+ puppy pulls a lot on the leash. I am trying to train this out of him but progress has been painfully slow, he keeps ripping my arm off. I was wondering if just to get the training to stick, so for a short term, one of those choke collars might be useful. Personally I detest the idea but I need to think of the dogs training because as it stands my daughters get pulled around by the pup and this has led to cuts and bruises.
I have other questions so this is why I am looking for a correct dog forum.
I dont know if it matters but the dog is a Bouvier Des Ardennes, forums for this breed would be cool, I looked but could not find any..
as posts without pictures are useless here is a picture of my new copilot!
I have read into it and I am no convinced about these choke collars. I will look into some other training.

General Discussion / CNC 'wood'router to ER11 collet?
« on: April 02, 2020, 02:03:58 AM »
Hello everyone,
I am so very happy to report that the renovations are nearly finished and I can finally start to re-organise my 'workshop' room... so many plans..
So, in order to get going with my 'new' (2nd hand) cnc machine I would like to know if the following is even possible and if so what parts I would need (and what they would be called) to be able to use an ER11 collet system in a normal woodworking router as is already installed on the cnc.
Is there a name for the nut thing size on an standard woodworking router (1/4 inch???) and a name / size for the new one I would need? Are these things even called router nuts?
I have got a new spindle for ER11 collets but need to build and adapter and that wont be for a while...
Thanks in advance for any help, it is appreciated as I cant wait to get going on this cnc, sooo many projects (think star wars Inca calendar!!)

General Discussion / lasered stencil for tshirt print?
« on: January 14, 2020, 01:26:59 PM »
I have had the idea for a gift of some printed tshirts or even sweatshirts ( I have about 10 I would like to make.) using a lasered stencil and paint.
I have been too busy (not been around much these past few months, new job, house etc. all good. sorry about that.) to even
think about this and now if I want to gift it at a suitable time I have to hurry! All I have been able to do is try and work on a stencible design,
I have no idea what material I could use. I thought about the 'liolium' plastic floor tile type thing
but I have no idea if this is laserable. Thinner plastic sheet might also work, how do you know if a plastic sheet is pvc (=>chlorine!) or not?
Apart from lasering I thought of using my cnc milling machine but it is in bits and I dont have time to rebuild it now (its planned, eventually!).
So any ideas on how to print a design on tshirts with paint using a laser? One color is easier, but if several colors could be easily printed I am willing to try.

Projects / scout logo on slate
« on: December 05, 2019, 03:31:42 AM »
I am now officially part of the kids troupes 'staff' (here it is the level above the scout leaders, I take care of building maintenance, subsidies,
training and all the other boring adult stuff) and to celebrate the work of those my team is replacing (one of whom has been in this troupe
for over 50 years!) I thought to make them some gifts. I would love to laser engrave on glasses (wine and Belgian beer mugs) but I dont
have a rotary tool (yet!) so for the moment it is simple slate.

Here ( )is my first attempt, very badly centered (I am having issues getting the centering
correct, any tips? I use laserweb) but I am very happy with the vector I managed to create (still not 100% as the 'path' seems off, the
laser moves, then slows down then speeds up...strange but certainly an issue with my svg conversion (inkscape).

For those curious it is the 3rd and 7th scouts and guides troupe in Brussels. It is more than 90 years old and we have around 400 kids in all.
I was thinking of engraving more sections of the logo but not sure this will improve the result.... what do other slate engravers think? Should
I fil in parts of the logo to make it stand out more??

General Discussion / The Missus sais no more lasering =(
« on: December 05, 2019, 03:14:09 AM »
Sadness in my household, the missus has spoken and I can no longer leave the garage door open to let out all the fumes from lasering!!!
It is sub-zero (Deg C here!) and the old house is difficult enough to heat so the garage door is staying closed...
But each cloud has its silver lining, I will move on to slate only as this does not produce as much smelly smoke and so I can do it with the door closed!!!
Happy lasering to all!

Mini CNC / Help!! centering the endmill in the router?
« on: October 27, 2019, 02:11:00 AM »
I finally have all the bits needed to get milling.. I had to buy new collets as the ones used with the router were the larger woodworking sized ones (1/4" I think) used in hand held routers. I plan on using a 3mm (1/8") shank bit and had to get a collet that would hold a smaller bit / endmill.
The collet 'floats' in the router and so finding center is very difficult especially on the smaller bits. Tightening it centered is proving to be impossible.

Anyone know how I can constantly get center on the endmill?? I think what I am talking about is called 'runout' but I am not sure of this. I wan thinking of using a machinists square but they are too big to fit under the router attached to the Z axis. I have been searching for 'endmill runout' but cant seem to find anyone with the same issue!!

TLDR: I cant get my endmill centered and when it spins it wobbles.

thanks for any help that can get me milling!!

Mini CNC / Z zero to spoilboard
« on: August 23, 2019, 10:12:39 AM »
Do many of you use this technique to zero the z axis onto the soilboard?
This looks quite a good thing to do.

Mini CNC / new to me cnc mill!!!
« on: August 14, 2019, 12:23:45 AM »
So I cracked and got myself a 2nd hand cnc mill. It is 600x600x70 which is nice but it uses a HY-TB3DV-S controller board that I have never seen before. The antique pc that came with it uses mach3 so I suppose the board is g-code compatible.
I am still looking into what I have got and what work I need to do on it (the cabling is atrocious and it all needs replacing).
I would like to know what your workflow is, as in where you start to create something to mill. What software do you use (to create your designs and to control the mill). I am having trouble figuring out how to get a 2d design into 3d..
any advice / pointers are welcome!

Projects / laser cut gingerbread cathedral
« on: June 17, 2019, 01:36:13 AM »
From hackaday;

Members of Sector67 tried their hands at laser cut gingerbread houses. The Madison, Wisconsin based hackerspace is using the tabbed box method of assembly for the corners of the structure. They’ve also put up a bunch of information about laser settings and published the recipe used to mix up a sheet of gingerbread. This quite a bit more info than was provided with the project we saw a couple of weeks back.

The initial designs were made in Inkscape and then transferred to Corel Draw before heading to the cutter. They’ve got a 150W machine and found that a speed of 15 worked well when the speed was set to 100, with a corner speed of 60. The raw dough was rolled out to 1/8″ thickness. Possibly the best tip coming out of Sector67 is to lay 1/8″ dowels on either side of the dough. This way the rolling pin will stop when it hits the dowels resulting in the best possible uniform thickness. As reported in the previous project the odor generated while cutting is not the most pleasant. But we love the fusion of lasers with the age old process of building with cookies and decorating with candy.

another 'material' to try out!!! Does is smell of burnt cake??

General Discussion / K40 130CFM inline fan...
« on: June 14, 2019, 01:05:35 AM »
I have bought a 130CFM inline 3" fan to replace the one supplied with the K40.
I am a little worried it might not be enough draw but I will install it and see.
I have read this ;

Having the fan directly at the back of your machine put alot of pressure on the fan.
It has to do two things. Both creating a negative pressure inside the machine to suck the smoke up, and creating a static positive pressure, to push the air in the 4-5 meter hose.
Positive and negative pressure works against each other, moving the fan to the end of the fan will almost be 100% effect on sucking (negative pressure) as there is no positive pressure built up.

is this true?? I dont know enough to judge the accuracy of what they say but it sort of makes sense, but then again it doesn't as to me if there is a negative pressure there will automatically also be a positive pressure, you cant have one without the other!!!

there they also mention;
Tips for having a optimized exhaust.

1: Buy a in-line fan matching the hose you are using, 100-150cfm is enough
2: Put the fan at the END of the hose, where you evacuate the smoke (window sill for example)
3: Seal your machine to prevent smoke creeping in to your room.
4: Have a good working smoke assist in your machine

so the fan I got might be ok...

General Discussion / going to lend my elekslaser-a3 pro 2500mw...
« on: May 26, 2019, 03:35:45 AM »
I plan to lend my elekslaser-a3 pro 2500mw to a friend as she is a graphics designer and will probably use it more than I have been (damm you K40!!!).
She is a mac user and I have no idea what will work on a mac.
Any suggestions as the the software she can use on a mac? I would prefer free as I use my T2Laser license for me (selfish I know!!).
I was thinking of laserweb but it seems a bit much for a beginner and its workflow is a bit clunky..
any other suggestions welcome!!

Projects / stuff I have been engraving...painted tiles
« on: May 09, 2019, 12:53:09 AM »
I have not had much time recently but as these are all quite small I manage to find 5-10 minutes to mess about.
The tiles are old ones that do not engrave well at all (Imperial logo) so I painted them with some black spray paint I had.
I give them away (for free!!!) and stick cork I had on the back, a coat of varnish and they become some coasters.
For laughs I also tried engraving the cork and I thing that the results look very good for simple stuff, less so for things like text.
I seem to be unable to upload the pictures so here are the links...  this is the backing of an old ikea wardrobe, mdf.

General Discussion / pizza cooking advice!!
« on: March 09, 2019, 12:32:09 PM »
So I checked, this category does say "talk about anything" so I shall!!
The S.O. got me to buy her a new oven.. this one does pyralisis cleaning ...
meaning it heats up to 500 deg C to burn off all the grease..
So.. pizzas need around a 400 deg C oven...
my thought is to put a pizza stone or steel and clean the oven for her
then use the residual heat to cook pizza, win-win for all involved...
or have I had one too many triple karmeliet??

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