Hello Guest it is November 22, 2019, 12:46:50 AM

Author Topic: New people welcome !! Come in here and introduce your self!  (Read 3483388 times)

0 Members and 12 Guests are viewing this topic.

Re: New people welcome !! Come in here and introduce your self!
« Reply #2470 on: August 27, 2017, 02:38:32 PM »
Hi,
I used 1/2 inch acrylic because I already had it. While the pocket is level with respect to the z axis it can't do any thing about flex/twist/bow in
the PCB blank, and flex/twist/bow is there, seldom more than 0.2mm, but you're trying to cut a 0.035mm copper layer. I regularly set the cut
depth to 0.06mm, if there is any flex/twist/bow then it will cut too deep and wear the tool or not cut deep enuf and leave copper un etched.
Even holding down the blank with screws at the corners is likely to induce flex in the board sufficiently to wreck the result. I now use doublesided
tape to hold the board down. Its not without its drawbacks but it works OK.  Vacuum holding would probably be best but have not yet got
around to trying it seriously.

Craig
My wife left with my best friend...
     and I miss him!

Offline Turd Fergeson

*
  •  6 6
  • keep on sucking till you do succeed!
    • View Profile
Re: New people welcome !! Come in here and introduce your self!
« Reply #2471 on: August 27, 2017, 05:35:14 PM »
Cool. I didn't even consider acrylic. I wondered about tool life and FR4. Fiberglass is more abrasive than copper. A machinist at work makes work related (metal core) LED PCB's for me. He uses double sided tape too. He's never really mentioned any problems with it but that doesn't mean there aren't any. I notice he has trouble lifting the boards off sometimes when they are done and has to bend them some. We came up with the idea of putting acetone around the board first and letting it sit a minute to soften the adhesive, it just doesn't seep in far so it takes time (lift, soak). I wouldn't think their would be much lateral load on the pcb at all. a sharp bit and the right tool speeds so your not scraping copper off and an accurately cut pocket might be good enough with a vacuum system. If you could mill another larger pocket on the bottom of the acrylic with a bunch of small holes into the upper pocket, and mill a pocket for an o-ring around the edge of the bottom pocket and mount that to a thin aluminum plate that fastens to the table, you might have an easily created vac system. I would think a takeoff from your shop-vac might do it and suck up some dust in the process. Don't know what kind of pressure would be needed but it might be worth a try.      
« Last Edit: August 27, 2017, 05:37:07 PM by Z71Boy »
Re: New people welcome !! Come in here and introduce your self!
« Reply #2472 on: August 27, 2017, 08:34:39 PM »
Hi,
yes you are right, excessive cutting of fibreglass dulls tools BIGTIME!. The aim is to have as little cut depth as possible
and yet not miss any copper that needs be cut. Doublesided tape can distort the board on removal, any idea to have
the adhesive release is a good idea.

One board I make has 12oz copper, yeah thats right 0.42mm! I require flood cooling to achieve useful tool life
but requires a good doublesided tape which can cause a real problems when time comes to release.

I have tried, although without great effort, to use vacuum. My preference is to drill thru holes before etching which
stuffs up the vacuum.

I think if we wish to carry on this conversation we should start a new topic rather than clutter up this one.

Craig
My wife left with my best friend...
     and I miss him!

Offline Turd Fergeson

*
  •  6 6
  • keep on sucking till you do succeed!
    • View Profile
Re: New people welcome !! Come in here and introduce your self!
« Reply #2473 on: August 27, 2017, 10:10:19 PM »
Craig, I agree.

I would like to discuss more once I get my feet wet. I figured out how to add the auto-zero script and run it in mach. It works well. I have the feeling there is a ton more I need to learn about before I can start cutting copper. Like always, I need to find the time. Thanks for the awesome tips and conversation. Hope to talk again soon.

Bill
Re: New people welcome !! Come in here and introduce your self!
« Reply #2474 on: August 29, 2017, 05:37:54 PM »
HELLO PEEBS
I'm in the UK (not by choice by birth) i have some (limited) experience with mach3 having worked a taig mill in a jewelers designing and making all manner of bling things  and boxing belts etc also a revo 540c 5 (simulated) axis  ..i have just recently got two machines from china one given to me and one purchased .the given is a three axis 60 40 with ball screws so appears OK not been run yet still cleaning it up ..the other smaller 30 40 is lead screws and looks like it might do the job but will replace the screws in time it is however four axis so i can mill cylinder stuff so may do some new legs for my coffee table :) ...lol i have also been trained by Auto desk and Delcam also rhino and matrix so am OK at modelling too just learning blender at the mo use sculptris and am considering the leap to z brush as it seems like the most capable program I've seen so far. I'm also an artist so like to sling a little colour around too my full time job is tattoo but i like to melt a little metal at times  ..my main aim is to get into five and six axis carving so would appreciate any (cheap) leads in that direction :) I'm not rich definitely in the DIY category AT THE MOMENT :)
Re: New people welcome !! Come in here and introduce your self!
« Reply #2475 on: September 05, 2017, 06:24:39 AM »
Hello Members, Just came across this fabulous community and glad to be part of this, I pretty interested in technology and want to learn from you all.
Re: New people welcome !! Come in here and introduce your self!
« Reply #2476 on: September 05, 2017, 12:34:37 PM »
My name is Donnie and I am very new here and my first post.  I have a Sherline Lathe 4410 of which I need to install some type of CNC to in order for me to make some parts that I can repeat the same process.  I have a forum myself that I own and operate and that is www.shipsofscale.com/sosforums/  well, I am not here to advertise my Ship Building Forum. I am here because I am overwhelmed by the nature of too many things to choose from (parts, motors, drivers)  to make a CNC work.  First, I like what I see with the Mach3 and would like to purchase it. But, I have some questions that are obvious to some, but are not obvious to me.

I wish that I could get some help. Also, I might need to post this in the general section as I am not sure if I am posting in the correct place.  All I have at the moment is a Sherline 4410 lathe and that is it for now.  No CNC motors, nothing, not even a PC yet.
Now, I was thinking about downloading the Mach3, but I am going to have to get some hardware.

This is where I get really confused.  So Sherline makes a Controller Box that has the cables and the two motors that I need. But, newer PC's do not have nor any of the newer PC's have the Printer Port.  So, I would have to have a USB to 25 pin for the Sherline Driver box.  So, is this set up wrong:  Lathe -> Sherline Driver Box -> USB to Printer Port (for the sherline machine control) -> Mach3 program
or should I be doing something else.

I am totally new at this and lost.

Thanks
Donnie
Re: New people welcome !! Come in here and introduce your self!
« Reply #2477 on: September 10, 2017, 12:56:17 PM »
Hi,
I've been using mach 3 on all of my home built cnc routers. Currently have a Diy large format cnc router (2mx1.5m) and an openbuilds C-beam XL. Both used for woodworking for my small etsy shop and whatever else I feel like making :)
Re: New people welcome !! Come in here and introduce your self!
« Reply #2478 on: September 15, 2017, 12:44:37 PM »
Hello,

my name Nanda Weinik, from Indonesia.

I use google translation.
sorry if my words are hard to understand

i am very new in this forum and this is the first time using mach 3.
first look easy, when tried a lot hard.

little problem with shuttle mode, anyone can help?


thank you
Re: New people welcome !! Come in here and introduce your self!
« Reply #2479 on: September 15, 2017, 04:47:43 PM »
hi im gman  im completely new and trying to understand all this  mach 3 sheetcam  cad  28   all at the same time  im an irish man living in texas . I hope im in the right place to try and learn as much as I can on these subjects . my hobbies are guitar .DIY .