Re: [Emc-users] Rigid tapping

On Tue, 15 Aug 2023 at 11:16, John Dammeyer wrote: > I'd guess that if the spindle encoder is such that on each servo period > event, that if the position of the encoder isn't electrically determined by > another encoder edge, then a calculated value based on where the system > thinks it

Re: [Emc-users] Rigid tapping

her encoder edge, then a calculated value based on where the system thinks it is will be reported as the position. John > -Original Message- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: August 15, 2023 1:03 AM > To: Enhanced Machine Controller (EMC) > Subject: Re:

Re: [Emc-users] Rigid tapping

On Tue, 15 Aug 2023 at 01:11, John Dammeyer wrote: > It's why I'm filtering. And yes. I agree, at this slow a speed I suspect > what I will find is two different velocities reported from edge to edge. Rigid tapping uses the encoder-position, not the encoder velocity. (And I wouldn't suggest

Re: [Emc-users] Rigid tapping

C) > Subject: Re: [Emc-users] Rigid tapping > > Would you ever be tapping that slow? If you are - then yes - higher > resolution or try interpolation.. (Will that be bad in rigid tapping > reversals? Threading on a lathe interpolation works great - but that is > one direct

Re: [Emc-users] Rigid tapping

gt; Subject: Re: [Emc-users] Rigid tapping > > I think with encoders that are not symmetric 50/50, you need to look only at > the leading edges. (Or only at the trailing edges) > > Yes,this cuts the resulution in half but removes the nose.I think for > somethig with a lot of r

Re: [Emc-users] Rigid tapping

Would you ever be tapping that slow? If you are - then yes - higher resolution or try interpolation.. (Will that be bad in rigid tapping reversals? Threading on a lathe interpolation works great - but that is one direction...). The green machine had a gear tooth encoder - about 40 ish teeth.

Re: [Emc-users] Rigid tapping

I think with encoders that are not symmetric 50/50, you need to look only at the leading edges. (Or only at the trailing edges) Yes,this cuts the resulution in half but removes the nose.I think for somethig with a lot of rotational inertia, like a spindle, you can use interpolation to get

Re: [Emc-users] Rigid tapping

it. Good luck John. -Original Message- From: gene heskett [mailto:ghesk...@shentel.net] Sent: August 14, 2023 1:31 PM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Rigid tapping On 8/14/23 15:53, John Dammeyer wrote: This thread has some good information about this https

Re: [Emc-users] Rigid tapping

On Mon, 14 Aug 2023, John Dammeyer wrote: Date: Mon, 14 Aug 2023 16:36:16 -0700 From: John Dammeyer Reply-To: "Enhanced Machine Controller (EMC)" To: "'Enhanced Machine Controller (EMC)'" Subject: Re: [Emc-users] Rigid tapping Hi Andy, I don't know. How can

Re: [Emc-users] Rigid tapping

gone too far and now the drive stops because it has overshot. I'm guessing. I'll let you know. John > -Original Message- > From: gene heskett [mailto:ghesk...@shentel.net] > Sent: August 14, 2023 1:31 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users

Re: [Emc-users] Rigid tapping

rps <= hm2_7i92.0.encoder.01.velocity net spindle-index-enable <=> hm2_7i92.0.encoder.01.index-enable > -Original Message- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: August 14, 2023 1:06 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Ri

Re: [Emc-users] Rigid tapping

On 8/14/23 15:53, John Dammeyer wrote: This thread has some good information about this https://sourceforge.net/p/emc/mailman/message/34363029/ For interest sake I set my mill up to turn 1 RPS with my 60 tooth non-symmetrical encoder (4mm slots, 2.5mm teeth) and then ran the power tapping

Re: [Emc-users] Rigid tapping

On Mon, 14 Aug 2023 at 20:57, John Dammeyer wrote: > What I found is that it moved in short spurts. Are you using straight encoder position, or position-interpolated? (this might not be an option depending on what is counting the encoder pulses) -- atp "A motorcycle is a bicycle with a

[Emc-users] Rigid tapping

This thread has some good information about this https://sourceforge.net/p/emc/mailman/message/34363029/ For interest sake I set my mill up to turn 1 RPS with my 60 tooth non-symmetrical encoder (4mm slots, 2.5mm teeth) and then ran the power tapping G-Code to see what the knee Z axis would

Re: [Emc-users] Rigid tapping with geared encoder

Your intuition is right. If you don't care about starting in the same orientation each time, it doesn't matter. My VMC has the encoder on the motor, and it doesn't have an index at all. I wired the A to the Z input on the mesa card so it gets lots of indexes and the tapping starts wherever it

[Emc-users] Rigid tapping with geared encoder

ohn Dammeyer) >5. Re: Rigid tapping with geared encoder (Gene Heskett) > > > -- > > Message: 1 > Date: Fri, 3 Sep 2021 16:29:55 +0100 > From: andy pugh > To: "Enhanced Machine Controller (EMC)" > > Subject: [Emc-users] Rigid tappin

Re: [Emc-users] Rigid tapping with geared encoder

On Friday 03 September 2021 11:29:55 andy pugh wrote: > I have just advised someone on the forum that he needs a 1ppr index to > rigid tap, as his encoder is mounted to the motor, not to the spindle. > > But then I started wondering if this is technically correct. I have a > feeling that

Re: [Emc-users] Rigid tapping with geared encoder

. But then it may also have you that explained it to me... John > -Original Message- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: September-03-21 8:30 AM > To: Enhanced Machine Controller (EMC) > Subject: [Emc-users] Rigid tapping with geared encoder > > I have

Re: [Emc-users] Rigid tapping with geared encoder

Hello Andy, Didn't try rigid tapping but the Mazak has the encoder coupled to the spindle by means of a timing belt in a 1:1 ratio. So, unless the motor in that machine is coupled in a synchronized way to the spindle you'll always have the chance of missing synchronization. Also ,as you pointed

Re: [Emc-users] Rigid tapping with geared encoder

> On 3. Sep 2021, at 17:32, andy pugh wrote: > > I have just advised someone on the forum that he needs a 1ppr index to > rigid tap, as his encoder is mounted to the motor, not to the spindle. > > But then I started wondering if this is technically correct. I have a > feeling that

[Emc-users] Rigid tapping with geared encoder

I have just advised someone on the forum that he needs a 1ppr index to rigid tap, as his encoder is mounted to the motor, not to the spindle. But then I started wondering if this is technically correct. I have a feeling that single=pass rigid tapping will be fine, but mutli-pass won't work? Has

Re: [Emc-users] Rigid Tapping

Tap some air first! JT On 11/17/2016 2:21 PM, hubert wrote: > I like most of the suggestions except the MDF because it tends to wear > out cutters. I ordered a small amount of machinable wax, it will be > here tomorrow, but I am in a hurry so I will try the bolt and nut > approach today. If

Re: [Emc-users] Rigid Tapping

I like most of the suggestions except the MDF because it tends to wear out cutters. I ordered a small amount of machinable wax, it will be here tomorrow, but I am in a hurry so I will try the bolt and nut approach today. If that works I will test on a small chunk of delrin, if that goes well

[Emc-users] Rigid Tapping

You could practise with a piece of threaded rod(or bolt) in the chuck, and a nut held lightly in the vice. If the nut moves up or down during the tap cycle there's a problem. If you start with taps, a post mortem on a cut thread would be more difficult. On 17 November 2016 at 19:27, Kirk Wallace

Re: [Emc-users] Rigid Tapping

On 11/17/2016 09:12 AM, andy pugh wrote: > On 17 November 2016 at 17:01, Kirk Wallace > wrote: >> Machinable wax comes to mind for testing. It is easy to make and reuse. > > I recently used candles straight out of their wrapping as a sample material: > If you look

Re: [Emc-users] Rigid Tapping

On 17 November 2016 at 17:01, Kirk Wallace wrote: > Machinable wax comes to mind for testing. It is easy to make and reuse. I recently used candles straight out of their wrapping as a sample material: If you look carefully you can see the wick.

Re: [Emc-users] Rigid Tapping

On 11/16/2016 11:11 PM, hubert wrote: ... snip > what are your recommendations at some test trials to get the feel of > the Machines capabilities. ... snip Machinable wax comes to mind for testing. It is easy to make and reuse. http://wallacecompany.com/tmp/IMG_8432-1a.jpg

Re: [Emc-users] Rigid Tapping

On 11/17/2016 01:11 AM, hubert wrote: > I have a step and Direction driven AC Servo spindle with encoder output > that is supposedly capable of rigid tapping. I want to tap some 1/4 > inch aluminum with M3x0.5 spiral flute HSS tap. Initially I have the > spindle speed set at 150 rpm. Start about

Re: [Emc-users] Rigid Tapping

On 17 November 2016 at 07:11, hubert wrote: > What type of tapping cycle should I use, > Continuous, or some type of peck cycle. I don't think we have a peck-tapping cycle, so G33.1 is the only choice (unless you want to wrap it up in a loop) Try cutting air first, to make

Re: [Emc-users] Rigid Tapping

On Thursday 17 November 2016 02:11:53 hubert wrote: > I have a step and Direction driven AC Servo spindle with encoder > output that is supposedly capable of rigid tapping. I want to tap > some 1/4 inch aluminum with M3x0.5 spiral flute HSS tap. Initially I > have the spindle speed set at 150

Re: [Emc-users] Rigid Tapping

If it's the first time trying rigid tapping on this machine, why not doing some test runs on scrap pieces of MDF first, with M6 or M8 taps? On 11/17/2016 09:17:26, hubert wrote: I have a step and Direction driven AC Servo spindle with encoder output that is supposedly capable of

[Emc-users] Rigid Tapping

I have a step and Direction driven AC Servo spindle with encoder output that is supposedly capable of rigid tapping. I want to tap some 1/4 inch aluminum with M3x0.5 spiral flute HSS tap. Initially I have the spindle speed set at 150 rpm. What type of tapping cycle should I use, Continuous,

[Emc-users] Rigid Tapping in U,V,W

hi what would it take to add or finish adding U V W rigid tapping ? as i see when you command G33.1 with a W it is accepted but goes to postion and just does the next line of code with out doing the tapping move. so it looks like someone might have started adding rigid tapping in U V W? i use

Re: [Emc-users] Rigid Tapping in U,V,W

ontroller (EMC)" <emc-users@lists.sourceforge.net> Sent: Saturday, February 13, 2016 4:50:15 AM Subject: [Emc-users] Rigid Tapping in U,V,W hi what would it take to add or finish adding U V W rigid tapping ? as i see when you command G33.1 with a W it is accepted but goes to postion and

Re: [Emc-users] Rigid Tapping in U,V,W

yes you can tap in X Y Z no problem, if you try it out in the 9axis sim you can see U V W does not follow spindle just goes to position in the G code, and then proceeeds to the next line of code with no error etc even if you switch planes or (G18 or G17.1) my config is on a 3 axis lathe X Z

Re: [Emc-users] Rigid Tapping in U,V,W

-questions?start=20#70064 - Original Message - From: "robert - Innovative-RC" <rob...@innovative-rc.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Saturday, February 13, 2016 8:54:12 AM Subject: Re: [Emc-users] Rigid Tapping in

Re: [Emc-users] Rigid Tapping in U,V,W

Thanks Todd before i dig into your code, i read the thread and if i understand correctly, then i can rephrase what you did ( my standard test for whether i understand ;-) i think you commanded W and added the delta to the W while the custom M code was in effect. true? i did similar for sink edm

Re: [Emc-users] Rigid Tapping in U,V,W

: "TJoseph Powderly" <tjt...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Saturday, February 13, 2016 10:59:27 AM Subject: Re: [Emc-users] Rigid Tapping in U,V,W Thanks Todd before i dig into your code, i read the thread and i

Re: [Emc-users] Rigid Tapping in U,V,W

thanks todd i also used the offset component so it sounds familiar the offset component was returned to original position simply by nudging till offset was 0 tomp On 02/14/2016 06:54 AM, Todd Zuercher wrote: > I'm not quite sure I understood your reinterpretation of what I tried to > explain.

Re: [Emc-users] Rigid tapping speed advice

On 23.01.16 17:08, andy pugh wrote: > If you drill a hole of D-1p then you are at about 78% engagement. That'll do me for M10 and up, but it's scary for Gene's M3. I was certain I was going to break the tap if I persisted with 82% engagement, which is as close to D-1p as you get with 0.1mm drill

Re: [Emc-users] Rigid tapping speed advice

On 23.01.16 12:27, Gene Heskett wrote: > Now we are getting more precise than we can drill with the typical drill > bit, which usually drills oversize because the tip flats are > un-avoidably off center. Even to a small extent for pricy carbide bits > in the smaller sizes. Yesterdays finished

Re: [Emc-users] Rigid tapping speed advice

Erik, I don't know wat table you were glancing at, but here is the table from Europes No:1 tool seller, Hoffmann Group (http://www.gewinde-norm.de/metrisches-iso-gewinde-din-13.htm), listing metric ISO / DIN13 threads: Thread PitchCore diam. bolt Core diam. nut Drill

Re: [Emc-users] Rigid tapping speed advice

On 24.01.16 13:28, Peter Blodow wrote: > Erik, I don't know wat table you were glancing at, The one I posted upthread. It is much more convenient than calculating engagement each time, and safer than just using D-p below M6. Erik

Re: [Emc-users] Rigid tapping speed advice

Sorry, the mail didn't transport the table like it was supposed to. I try again without table function: Thread PitchCore diam. bolt Core diam. nut Drill size mm Wrench size mm M1 0,25 0,6930,729

Re: [Emc-users] Rigid tapping speed advice

On Sunday 24 January 2016 04:18:27 Erik Christiansen wrote: > On 23.01.16 12:27, Gene Heskett wrote: > > Now we are getting more precise than we can drill with the typical > > drill bit, which usually drills oversize because the tip flats are > > un-avoidably off center. Even to a small extent

Re: [Emc-users] Rigid tapping speed advice

OSG, referenced earlier by John Thornton, has this tool (http://www.osgtool.com/Technical.asp?tid=1=1) that calculates hole size given Major Dia, Pitch, and Engagement (% of Thread). Their numbers seem to be slightly different than Erik’s though, but they suggest 60-70% engagement for deep

Re: [Emc-users] Rigid tapping speed advice

On 23 January 2016 at 11:18, Peter Blodow wrote: > Tom, the formula for drilling for metric threads is simple: nominal > thread diameter minus the pitch, e.g. 12 - 1.5 = 10.5 mm for M12, or 6 - > 1 = 5 mm for M6 etc. This works for any 60 degree thread, so is good for US

Re: [Emc-users] Rigid tapping speed advice

The general tap hole size goes out the window with many materials and thread depths and brass as you know is not like tapping cold butter... JT On 1/23/2016 5:48 AM, andy pugh wrote: > On 23 January 2016 at 11:28, Erik Christiansen > wrote: >>> The OSG online tool

Re: [Emc-users] Rigid tapping speed advice

On 23.01.16 13:28, Peter Blodow wrote: > Old fairy tale, fact ist that brass (depending on the zinc content) > needs a lower cutting angle then steel, both tools ought to be as sharp > edged as possible. For holes in brass larger than 10 mm, I use drill > bits with a 90° edge (broken edge, as

Re: [Emc-users] Rigid tapping speed advice

Tom, the formula for drilling for metric threads is simple: nominal thread diameter minus the pitch, e.g. 12 - 1.5 = 10.5 mm for M12, or 6 - 1 = 5 mm for M6 etc. Peter, Am 22.01.2016 18:43, schrieb tom-...@bgp.nu: > This is the tap I am using: >

Re: [Emc-users] Rigid tapping speed advice

On 22.01.16 12:43, tom-...@bgp.nu wrote: > This is the tap I am using: > http://www.mscdirect.com/product/details/58607482?rItem=58607482 > The drill I am using is 10.5mm which is 0.875 of 12mm so I would say > that seems fairly large. For M12, a 10.5 mm hole gives 69% thread engagement. Taking

Re: [Emc-users] Rigid tapping speed advice

Old fairy tale, fact ist that brass (depending on the zinc content) needs a lower cutting angle then steel, both tools ought to be as sharp edged as possible. For holes in brass larger than 10 mm, I use drill bits with a 90° edge (broken edge, as we say) since a 12 mm bit cougth once and

[Emc-users] Rigid tapping speed advice

Oops, I was just going by what you said without looking up the sizes. If it's metric coarse, then a M12 x 1.75 thread only needs a 10.2mm hole, so 10.5 should feel easy to tap. Regards Roland On 23 January 2016 at 13:12, Roland Jollivet wrote: > > I reckon that a

Re: [Emc-users] Rigid tapping speed advice

On Saturday 23 January 2016 01:07:28 Jon Elson wrote: > Hmmm, one other way to do this, if you don't have a lot of > holes to do, is a single-row thread mill. > traditional thread mills are good for only one thread > pitch. Single row thread mills only have one row of cutting > edges, so you run

[Emc-users] Rigid tapping speed advice

I reckon that a lot of the difficulty is that the hole is too small. At 12mm, there is quite a lot of force involved, and you are using a semi-bottoming tap, and it's a blind hole, and the tap is a weaker spiral shape. With a 10.5 hole you are using the tap to drill as well as tap. Use 10.7 as

Re: [Emc-users] Rigid tapping speed advice

On 23.01.16 13:23, Roland Jollivet wrote: > Oops, I was just going by what you said without looking up the sizes. > If it's metric coarse, then a M12 x 1.75 thread only needs a 10.2mm hole, > so 10.5 should feel easy to tap. The OP says M12 x 1.5, so that's what I based my mutterings on. Erik

Re: [Emc-users] Rigid tapping speed advice

On 23 January 2016 at 11:28, Erik Christiansen wrote: > >> The OSG online tool recommends a 27/64” (10.7mm) drill, so I am very >> close (0.008” difference). > > That only gives 60% thread engagement, if counting on my fingers is > working for me. Most digital calipers

Re: [Emc-users] Rigid tapping speed advice

On 23 January 2016 at 16:53, Gene Heskett wrote: > Does that not give a 100% thread? I was under the impression we use a .85 > multiplier. The idealised depth of thread for a perfectly sharp 60 degree thread with no rounding or flats is: (pitch/2) * tan(60) = 0.866p The core

Re: [Emc-users] Rigid tapping speed advice

On Saturday 23 January 2016 12:08:47 andy pugh wrote: > On 23 January 2016 at 16:53, Gene Heskett wrote: > > Does that not give a 100% thread? I was under the impression we use > > a .85 multiplier. > > The idealised depth of thread for a perfectly sharp 60 degree thread >

Re: [Emc-users] Rigid tapping speed advice

Gene, without being able to read what is engraved on them drill bits: those look decent, the metal box and the price suggest they are of better quality. Just about like mine I have been using for the last 35 years:

Re: [Emc-users] Rigid tapping speed advice

Thanks Tom. On 1/22/16 6:31 PM, tom-...@bgp.nu wrote: > We ordered the 1024ppr encoder (EM1-2-1024-I): > http://www.usdigital.com/products/encoders/incremental/modules/EM1#description > with this disk: > http://www.usdigital.com/products/encoders/incremental/rotary/disks/DISK-2 > and this

Re: [Emc-users] Rigid tapping speed advice

Gene, 0.091" (=2,3 mm) would be perfectly in the DIN / ISO range. I use 2.4 mm for easy working if strength is not the issue. More, my drills are all produced a little under their nominal size, maybe a few hundreths, to allow for de-centering of the cutting blades in order to give a correct

Re: [Emc-users] Rigid tapping speed advice

On Saturday 23 January 2016 06:18:55 Peter Blodow wrote: > Tom, the formula for drilling for metric threads is simple: nominal > thread diameter minus the pitch, e.g. 12 - 1.5 = 10.5 mm for M12, or 6 > - 1 = 5 mm for M6 etc. Does that not give a 100% thread? I was under the impression we use a

Re: [Emc-users] Rigid tapping speed advice

On Saturday 23 January 2016 12:21:03 Peter Blodow wrote: > Gene, > without being able to read what is engraved on them drill bits: those > look decent, the metal box and the price suggest they are of better > quality. Just about like mine I have been using for the last 35 years: >

Re: [Emc-users] Rigid tapping speed advice

On Saturday 23 January 2016 12:51:59 Peter Blodow wrote: > Gene, > 0.091" (=2,3 mm) would be perfectly in the DIN / ISO range. I use 2.4 > mm for easy working if strength is not the issue. > More, my drills are all produced a little under their nominal size, > maybe a few hundreths, to allow for

Re: [Emc-users] Rigid tapping speed advice

On 01/23/2016 02:27 AM, Gene Heskett wrote: > I would appreciate a PM'd copy of that, "just in case". It is online, at http://pico-systems.com/gcode.html Look near the bottom for "Thread Milling". You need to bore the hole to about the minor diameter of the thread first. Jon

Re: [Emc-users] Rigid tapping speed advice

Both yes and no depending of tool you have. I use these from https://shop.vhf.de/articleGroups/Circular-thread-cutters-W_GW_BGF.htm Easy to do flat bottom threaded holes. Bengt Den 2016-01-23 kl. 21:43, skrev Jon Elson: > On 01/23/2016 02:27 AM, Gene Heskett wrote: >> I would appreciate a PM'd

Re: [Emc-users] Rigid tapping speed advice

On Friday 22 January 2016 14:07:00 Gene Heskett wrote: > On Friday 22 January 2016 13:39:21 Sarah Armstrong wrote: > > yes i agree , single point would be a far better option , when you > > dont have the horsepower , > > So at some point, I need a boring head with an R8 rear end on it. >

Re: [Emc-users] Rigid tapping speed advice

On 01/22/2016 09:58 AM, tom-...@bgp.nu wrote: > I need some advice rigid tapping on an Emco120p lathe. > When I ran my first attempt at 300 rpm the tap went in, perhaps to full > depth, and then stalled. Well, if your spindle stalled, I'm not sure you have any real options. Even peck tapping

Re: [Emc-users] Rigid tapping speed advice

I have a SECO internal threading bar SNR 0005055-11 if your careful you can cut 9/16 internal threads with it. JT On 1/22/2016 1:15 PM, tom-...@bgp.nu wrote: > What are your favorite internal single point threading tools? I don’t have > one (yet) and haven’t tried any internal threads. How

Re: [Emc-users] Rigid tapping speed advice

On Friday 22 January 2016 14:15:11 tom-...@bgp.nu wrote: > What are your favorite internal single point threading tools? I don’t > have one (yet) and haven’t tried any internal threads. How small can > you go doing that? Did I mention I’m not a “real” machinist :-) > > Thanks everyone for all

Re: [Emc-users] Rigid tapping speed advice

On 01/22/2016 09:58 AM, tom-...@bgp.nu wrote: > I need some advice rigid tapping on an Emco120p lathe. The lathe has a 3.5HP > motor that can go from 50-3000rpm. It can travel at about 120 ipm (maybe 150 > ipm, but haven’t verified it’s max yet). Spindle torque drops off as I go > down in

Re: [Emc-users] Rigid tapping speed advice

On Friday 22 January 2016 12:43:35 tom-...@bgp.nu wrote: > This is the tap I am using: > http://www.mscdirect.com/product/details/58607482?rItem=58607482 The > drill I am using is 10.5mm which is 0.875 of 12mm so I would say that > seems fairly large. The OSG online tool recommends a 27/64”

Re: [Emc-users] Rigid tapping speed advice

On Fri, Jan 22, 2016, at 02:07 PM, Gene Heskett wrote: > On Friday 22 January 2016 13:39:21 Sarah Armstrong wrote: > > > yes i agree , single point would be a far better option , when you > > dont have the horsepower , > > > So at some point, I need a boring head with an R8 rear end on it. >

Re: [Emc-users] Rigid tapping speed advice

On Friday 22 January 2016 13:08:09 John Thornton wrote: > I was close too trying to deep hole tap the 7075 but close didn't cut > it. I had to buy the recommend bit. Is your spindle stalling out? Oh I > read your initial post again, cool thing in LinuxCNC the axis follows > the spindle so if it

Re: [Emc-users] Rigid tapping speed advice

What are your favorite internal single point threading tools? I don’t have one (yet) and haven’t tried any internal threads. How small can you go doing that? Did I mention I’m not a “real” machinist :-) Thanks everyone for all the good info! -Tom > On Jan 22, 2016, at 2:07 PM, Gene Heskett

Re: [Emc-users] Rigid tapping speed advice

On 22 January 2016 at 19:15, wrote: > How small can you go doing that? https://www.phorn.de/blaetterkatalog/supermini/ (Page A14) Looks like smaller than 3mm would be difficult. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto

Re: [Emc-users] Rigid tapping speed advice

Horsepower is you biggest enemy here , you need as much as you can get . On 22 January 2016 at 17:58, Gene Heskett wrote: > On Friday 22 January 2016 12:43:35 tom-...@bgp.nu wrote: > > > This is the tap I am using: > >

Re: [Emc-users] Rigid tapping speed advice

On 22 January 2016 at 19:07, Gene Heskett wrote: > So at some point, I need a boring head with an R8 rear end on it. > Something I haven't yet acquired. I think this was on a lathe, but it is possible to single-point thread with a boring head and a G33.1 move, I have done it.

Re: [Emc-users] Rigid tapping speed advice

I was close too trying to deep hole tap the 7075 but close didn't cut it. I had to buy the recommend bit. Is your spindle stalling out? Oh I read your initial post again, cool thing in LinuxCNC the axis follows the spindle so if it stalls nothing moves. JT On 1/22/2016 11:43 AM,

Re: [Emc-users] Rigid tapping speed advice

M12, why bother with tapping? Go for single point and no power issues like with tapping. Cheers Bengt Den 2016-01-22 kl. 19:12, skrev Sarah Armstrong: > Horsepower is you biggest enemy here , you need as much as you can get . > > On 22 January 2016 at 17:58, Gene Heskett

Re: [Emc-users] Rigid tapping speed advice

yes i agree , single point would be a far better option , when you dont have the horsepower , On 22 January 2016 at 18:17, Bengt Sjölund wrote: > M12, why bother with tapping? Go for single point and no power issues > like with tapping. > Cheers > Bengt > > Den 2016-01-22 kl.

Re: [Emc-users] Rigid tapping speed advice

On Friday 22 January 2016 13:39:21 Sarah Armstrong wrote: > yes i agree , single point would be a far better option , when you > dont have the horsepower , > So at some point, I need a boring head with an R8 rear end on it. Something I haven't yet acquired. Thanks Sarah. Cheers, Gene Heskett

Re: [Emc-users] Rigid tapping speed advice

Hi Tom, How did you end up mounting the new encoder to your EMCO? I'd like to do the same thing to mine. Drew On 1/22/16 7:58 AM, tom-...@bgp.nu wrote: > > However, I often see videos of machining centers just spinning way a high > speed tapping like it’s no big deal. Should I be tapping at

[Emc-users] Rigid tapping speed advice

Single point threading - my best was a M6 x .5 20mm depth using a Micro-100 solid carbide mini threading bar in 303 Stainless. Thread milling - #6-32 with a usable thread depth of .470" in 6061 AL. Andy's boring head tapping (X axis) - I have lost many carbide threading inserts which chipped

Re: [Emc-users] Rigid tapping speed advice

On 22 January 2016 at 22:04, Greg Bentzinger wrote: > Thread milling - #6-32 with a usable thread depth of .470" in 6061 AL. I know a chap who has thread-milled M2 in titanium. That's a 1.6mm hole and a thread mill that costs £130. 16th picture down

Re: [Emc-users] Rigid tapping speed advice

On 22 January 2016 at 21:33, Gene Heskett wrote: > Perhaps Andy might recall that URL? It is only likely to have been: http://www.chronos.ltd.uk or http://www.rdgtools.co.uk or possibly http://www.arceurotrade.co.uk with a (very) outside bet on http://www.amadeal.co.uk

Re: [Emc-users] Rigid tapping speed advice

Hmmm, one other way to do this, if you don't have a lot of holes to do, is a single-row thread mill. traditional thread mills are good for only one thread pitch. Single row thread mills only have one row of cutting edges, so you run a pass much like a single point threading operation, but

Re: [Emc-users] Rigid tapping speed advice

. (but you might want to order some spares first.) - Original Message - From: tom-...@bgp.nu To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Friday, January 22, 2016 10:58:13 AM Subject: [Emc-users] Rigid tapping speed advice I need some advi

Re: [Emc-users] Rigid tapping speed advice

What kind of tap did you use? I use only ElectroLube coated taps from OSG. OSG has an online tool to select the correct tap and drill for each job. I once had to deep hole tap in some 7075 and my normal taps broke off. I used the tool and got the right tap and drill so the hole size was

[Emc-users] Rigid tapping speed advice

I need some advice rigid tapping on an Emco120p lathe. The lathe has a 3.5HP motor that can go from 50-3000rpm. It can travel at about 120 ipm (maybe 150 ipm, but haven’t verified it’s max yet). Spindle torque drops off as I go down in lower rpm range, of course. I have done some tapping

Re: [Emc-users] Rigid tapping speed advice

On Friday 22 January 2016 10:58:13 tom-...@bgp.nu wrote: > I need some advice rigid tapping on an Emco120p lathe. The lathe has > a 3.5HP motor that can go from 50-3000rpm. It can travel at about 120 > ipm (maybe 150 ipm, but haven’t verified it’s max yet). Spindle > torque drops off as I go

Re: [Emc-users] Rigid tapping speed advice

This is the tap I am using: http://www.mscdirect.com/product/details/58607482?rItem=58607482 The drill I am using is 10.5mm which is 0.875 of 12mm so I would say that seems fairly large. The OSG online tool recommends a 27/64” (10.7mm) drill, so I am very close (0.008” difference). Also, if I

Re: [Emc-users] Rigid tapping speed advice

Hey Drew, I ended up mounting it exactly like the old encoder, in the same cylindrical housing. I only had to machine a new mount for the encoder housing because the disc was smaller diameter so the mount had to raise the encoder a bit compared to the older one. I attached the encoder wheel

Re: [Emc-users] Rigid tapping speed advice

We ordered the 1024ppr encoder (EM1-2-1024-I): http://www.usdigital.com/products/encoders/incremental/modules/EM1#description with this disk: http://www.usdigital.com/products/encoders/incremental/rotary/disks/DISK-2 and this cable:

Re: [Emc-users] Rigid tapping speed advice

On Jan 22, 2016, at 9:31 PM, tom-...@bgp.nu wrote: > > bgp.nu:/~tom/pub/EMCO120P-NewEncoderBrakt.stp Oops, my link had a typo in it. The correct link is: http://bgp.nu/~tom/pub/EMCO120P-NewEncoderBrakt.stp -- Site24x7

Re: [Emc-users] Rigid tapping speed advice

On Friday 22 January 2016 17:52:56 andy pugh wrote: > On 22 January 2016 at 21:33, Gene Heskett wrote: > > Perhaps Andy might recall that URL? > > It is only likely to have been: > > http://www.chronos.ltd.uk Nope. > or > > http://www.rdgtools.co.uk This rang bells but the

[Emc-users] Rigid tapping videos

My videos of rigid tapping. The video shown is my first test of rigid tapping on real material. It worked like a charm. I picked 10/32 because it is such an easy thread. http://igor.chudov.com/projects/Bridgeport-Series-II-Interact-2-CNC-Mill/32-Spindle-Encoder/ Apparently, I can tap 15 holes

Re: [Emc-users] rigid tapping

I have just completed the conversion of my HERMLE 801 to EMC2. Rigid tapping was the last function to implement. From my experience you need an encoder coupled to the spindle. I used a simple but reliable encoder made by CUI (AMT102, www.cui.com). With the A, B and Index pulses EMC knows the

Re: [Emc-users] rigid tapping

Here's our simple solution for the spindle encoder: http://www.anderswallin.net/wp-content/uploads/2008/06/encoder.jpg It's a US-digital encoder which is mounted to a U-shaped bracket which is bolted to the fan-grill on the back of the AC-induction spindle motor. There was a thread on the end of

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