Re: [Emc-users] EDM Small Hole Drilling

good point i was an applications engineer and i used that trick sometimes you have to think well tho (it dont always work like you think) i always akin it to 'smoke goes up the chimney' and 'dont blow down the chimney' often the heat rise will aid the upwards flow and the swarf contained in

Re: [Emc-users] EDM Small Hole Drilling

I've got a question for you, TomP. Why aren't sinker edm systems operated in an inverted fashion, with the work facing down and the electrode underneath facing upward? I would think gravity could then help clear debris out of the hole. -- Ralph On Feb 11, 2017 2:35 AM, TJoseph Powderly

[Emc-users] EDM Small Hole Drilling

You don't say how many holes to drill/hr, how many holes per part, orientation of adjacent holes. (parallel, orthogonal) It may be practical to have a setup with multiple heads that EDM drills all the holes at once. On 10 February 2017 at 23:59, Jim Craig wrote: >

Re: [Emc-users] EDM Small Hole Drilling

thats hot! 1mm dia. tomp On 02/12/17 04:52, Ken Strauss wrote: > A local shop uses the larger version of these to deburr holes drilled in > tubing. They claim to be usable in 0.040 holes and there is a Swiss company > that I can't recall the name of that makes really small ones. > >

Re: [Emc-users] EDM Small Hole Drilling

Jim hello again let me stress the word 'scale' most google hits will claim edm has 'no burr' thats a damn-lie (tm) invented by sales-people i can feel it with my finger tip IF it was done fast on a cheap machine so there is a sliding scale of burr height from nanometers to tens of microns the

Re: [Emc-users] EDM Small Hole Drilling

On 2/11/2017 3:52 PM, Ken Strauss wrote: > A local shop uses the larger version of these to deburr holes drilled in > tubing. They claim to be usable in 0.040 holes and there is a Swiss company > that I can't recall the name of that makes really small ones. > >

Re: [Emc-users] EDM Small Hole Drilling

; From: dave [mailto:dengv...@charter.net] > Sent: Saturday, February 11, 2017 3:14 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] EDM Small Hole Drilling > > ECM can be good stuff but often slow. LOTS of current at low voltage. > NaCl or NaOH as ele

Re: [Emc-users] EDM Small Hole Drilling

ECM can be good stuff but often slow. LOTS of current at low voltage. NaCl or NaOH as electrolyte. Byproducts may not be soluble and therefore a mess especially if you make ferric hydroxide; a mess to filter. I thought about doing this in salt water. That is use water out of the bay. Not an

Re: [Emc-users] EDM Small Hole Drilling

On 2/10/2017 9:01 PM, TJoseph Powderly wrote: >> The reason I am contemplating the small hole EDM process is three fold. >> First it is difficult to drill these tiny holes in stainless and the >> drill bits frequently break. Secondly the back side of the hole needs to >> be burr free but is

Re: [Emc-users] EDM Small Hole Drilling

> The problem is EDM is very slow. Your holes would take at > the least, several minutes each. But, they'd be pretty clean. > You ought to get in touch with Ben Fleming, he demoed a > pulser EDM system at some of the CNC workshops in Ann Arbor > a few years ago. > >

Re: [Emc-users] EDM Small Hole Drilling

> >> Seriously though, lasers are expensive. I actually considered lasers > >> first and went back to a regular spindle. > > Also, going back to something else mentioned here, ECM might work. It might > > be especially effective if the geometry allows several holes to be made at > > the same

Re: [Emc-users] EDM Small Hole Drilling

On 02/11/17 17:15, Andy Pugh wrote: > >> On 10 Feb 2017, at 22:42, Jim Craig wrote: >> >> Seriously though, lasers are expensive. I actually considered lasers >> first and went back to a regular spindle. > Also, going back to something else mentioned here, ECM might

Re: [Emc-users] EDM Small Hole Drilling

> On 10 Feb 2017, at 22:42, Jim Craig wrote: > > Seriously though, lasers are expensive. I actually considered lasers > first and went back to a regular spindle. Also, going back to something else mentioned here, ECM might work. It might be especially effective

Re: [Emc-users] EDM Small Hole Drilling

Some googling turned up info on first drilling through with an undersize tool then making a grinding pass to finished size. http://link.springer.com/article/10.1007/s12541-012-0123-2 -- Check out the vibrant tech

Re: [Emc-users] EDM Small Hole Drilling

Small  hole  EDM  (electrical  discharge  machining)  drilling,  also  known  as  fast  hole EDM drilling, hole popper, and start hole EDM drilling, was once relegated to a “last resort” method of drilling holes. Now, small hole EDM drilling is used for production work. Drilling speeds have

Re: [Emc-users] EDM Small Hole Drilling

i was surprised how much off the shelf stuff exists its not impossible to reverse engineer the connections but a working experience is handy maybe you know an edm service engineer cum hacker? the mechanical stuff ( motors spindles pumps ) are too cheap to mess with diy the guides wont be a diy

Re: [Emc-users] EDM Small Hole Drilling

On Friday 10 February 2017 21:54:45 Jon Elson wrote: > On 02/10/2017 03:59 PM, Jim Craig wrote: > > So my questions are as follows. What type of power supply would I > > need to use for doing small hole EDM drilling? Can I use a tig > > welder as the power supply and control pulsing with LinuxCNC

Re: [Emc-users] EDM Small Hole Drilling

wow, i gotta look into that epoxy idea, we just pressurized the cavity with water and that was a complex jig already! thx tomp On 02/11/17 05:58, Comcast wrote: > The laser drilling was the first thing I thought of too. Pratt & Whitney > uses this process to drill similar size holes in the

Re: [Emc-users] EDM Small Hole Drilling

re: other technogies... if you can drill it, it'll be faster a good applications engineer from a good company can read your specs and give you tools and tooling that will do the job it may be expensive but its pretty guaranteed and even proven on your test parts tomp On 02/11/17 05:42, Jim Craig

Re: [Emc-users] EDM Small Hole Drilling

Jim hello I have worked with a lot of taiwanese hole drills ( hopops for short ) On 02/11/17 04:59, Jim Craig wrote: > I am working on a project at work where we are designing a new CNC > machine for a particular application. Up to this point I have been > planning on using a standard machine

Re: [Emc-users] EDM Small Hole Drilling

On 02/10/2017 03:59 PM, Jim Craig wrote: > So my questions are as follows. What type of power supply would I need > to use for doing small hole EDM drilling? Can I use a tig welder as the > power supply and control pulsing with LinuxCNC driving an external IGBT? TIG is constant current, and

Re: [Emc-users] EDM Small Hole Drilling

The laser drilling was the first thing I thought of too. Pratt & Whitney uses this process to drill similar size holes in the turbine blades. The keep the slag out of the holes they fill the interior of the blade with epoxy: Upon burn through the epoxy virtually explodes, blowing and slag or

Re: [Emc-users] EDM Small Hole Drilling

On 2/10/2017 4:16 PM, andy pugh wrote: > On 10 February 2017 at 21:59, Jim Craig wrote: >> The more I think about the actual process and needs of the machine I am >> thinking that a small hole EDM drilling head would be better for this >> application. > > Maybe

Re: [Emc-users] EDM Small Hole Drilling

On 10 February 2017 at 21:59, Jim Craig wrote: > The more I think about the actual process and needs of the machine I am > thinking that a small hole EDM drilling head would be better for this > application. Maybe consider lasers (and sharks?) too:

[Emc-users] EDM Small Hole Drilling

I am working on a project at work where we are designing a new CNC machine for a particular application. Up to this point I have been planning on using a standard machine spindle. The more I think about the actual process and needs of the machine I am thinking that a small hole EDM drilling