[Emc-users] A correction to Re: Rigid tapping speed advice

2016-01-23 Thread Erik Christiansen
Tom, please read the last part. Going to a 10.7 mm drill for M12 x 1.5 is a good move, and may fix the problem. On 23.01.16 11:48, andy pugh wrote: > On 23 January 2016 at 11:28, Erik Christiansen > wrote: > > > >> The OSG online tool recommends a 27/64” (10.7mm) drill,

Re: [Emc-users] How to find old Bosch drive manuals?

2016-01-23 Thread alex chiosso
Hi Marius. Do you have a picture of the drive and the whole electrical cabinet ? The drive should be a Bosch Servodyn but as you noticed it's quite difficult to find out any docs. This mainly because the SPM coding for Bosch (Rexroth-Indramat) means a generic usage for Spindle application. Do you

Re: [Emc-users] THC

2016-01-23 Thread John Thornton
Yes, when I get some stock in. JT On 1/22/2016 6:05 PM, Jim Craig wrote: > John, > > Is the THCAD card going to be available in your store? > > Thanks, > > Jim > > On 1/22/2016 5:57 PM, John Thornton wrote: >> I use the Mesa THCAD card to convert volts to frequency then the thc >> component to

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread andy pugh
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

2016-01-23 Thread John Thornton
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

2016-01-23 Thread Erik Christiansen
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

2016-01-23 Thread Peter Blodow
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

2016-01-23 Thread Erik Christiansen
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] A correction to Re: Rigid tapping speed advice

2016-01-23 Thread Peter Blodow
Erik, the drill sizes you are using are all 0.2 to 0.4 mm too large, especially with the small values M2 to M6 where it hurts the most. The resulting theads have got to be too loose, easy to overtighten. Don't use complicated formulas, especially not percent calculatations in public, as my

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread Peter Blodow
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

2016-01-23 Thread Roland Jollivet
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] VFD Noise

2016-01-23 Thread Dave Cole
You don't need to disconnect the shields at one end on the power conductor shields. Those are normally connected at each end. Dave On 1/22/2016 5:23 PM, Jim Craig wrote: > I spent all afternoon looking for and trying to remove ground loops. I > think I found all that I can eliminate. I have a

Re: [Emc-users] THC

2016-01-23 Thread John Thornton
I used the original THCAD card on my parallel port. You have to set the output frequency divider so the software can read the pulse stream. JT On 1/22/2016 6:15 PM, Jim Craig wrote: > Will the THCAD work with the paralell port? Will he need an FPGA card in > order to use the THCAD card? > >

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread Gene Heskett
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

Re: [Emc-users] THC

2016-01-23 Thread andy pugh
On 23 January 2016 at 03:07, Jim Craig wrote: > I think I answered my own question. Per the documentation output of the > THCAD is 100Khz to 1Mhz. Looks like it needs an FPGA encoder counter. It also says "The frequency output can optionally be divided by 32, 64 or

[Emc-users] Rigid tapping speed advice

2016-01-23 Thread Roland Jollivet
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

2016-01-23 Thread Erik Christiansen
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

2016-01-23 Thread andy pugh
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] A correction to Re: Rigid tapping speed advice

2016-01-23 Thread Erik Christiansen
On 23.01.16 14:48, Peter Blodow wrote: > Erik, > the drill sizes you are using are all 0.2 to 0.4 mm too large, > especially with the small values M2 to M6 where it hurts the most. No, I don't think so. As the note beside the table states: With a nut length of 1.5 * diameter, 50% engagement is

Re: [Emc-users] A correction to Re: Rigid tapping speed advice

2016-01-23 Thread John Thornton
As a general rule of thumb you are correct but there are many exceptions to that rule like material and depth which might require a larger and normal hole to prevent tap breakage. On 1/23/2016 7:48 AM, Peter Blodow wrote: > Erik, > the drill sizes you are using are all 0.2 to 0.4 mm too large,

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Marius Alksnys
Spindle motor is, as written on the nameplate, High-performance induction motor - or three phase asynchronous motor in other words. As drive power stage takes two analog voltages as phase current commands (third one is "calculated" inside), I am feeding them with sine signals, calculated by

Re: [Emc-users] How to find old Bosch drive manuals?

2016-01-23 Thread alex chiosso
Marius if you will get the wiring schematic this will be sure a big help to understand how to approach the retrofit in the right way. The cabinet is in any case in a good shape and very well integrated from the original manufacturer. Check out as much as possible what there are as "options" on the

Re: [Emc-users] Not as useful as I thought

2016-01-23 Thread andy pugh
On 22 January 2016 at 20:13, Jon Elson wrote: > Wire +24 to all clutch and brake coils. Wire -24 to the > common terminal on the relay. > Wire other ends of all coils to the individual relay > terminals. This could require some slight rewiring in the > machine. But,

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread andy pugh
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] A correction to Re: Rigid tapping speed advice

2016-01-23 Thread Gene Heskett
On Saturday 23 January 2016 09:43:59 andy pugh wrote: > On 23 January 2016 at 14:25, Erik Christiansen wrote: > > The tap offers no such variability. > > ... Normally :-) > > https://www.kennametal.com/content/dam/kennametal/kennametal/common/AT

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Pete Matos
excellent man did you get the toolchanger working as well? That is what mine is lacking. My machine is a 1997 Cincinatti Arrow 500 VMC. Pete On Sat, Jan 23, 2016 at 12:06 PM, Marius Alksnys wrote: > I am planning to finish to retrofit Cincinnati Arrow 750 with

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread Gene Heskett
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] A correction to Re: Rigid tapping speed advice

2016-01-23 Thread andy pugh
On 23 January 2016 at 14:25, Erik Christiansen wrote: > The tap offers no such variability. ... Normally :-) https://www.kennametal.com/content/dam/kennametal/kennametal/common/ATI%20Metals/Landis/Catalogs-Literature/SolidAdjustable.pdf -- atp If you can't fix it, you

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread Peter Blodow
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] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Marius Alksnys
I coded and tested spindle orientation and tool carousel control this week. I implemented a lot of checks here, as I learned something from severely damaged original carousel, which will be replaced when testing will be complete :) Now I am coding tool change: Z movements, pneumatic valves,

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Andy Pugh
> On 23 Jan 2016, at 17:43, Pete Matos wrote: > > I have to find a good way to orient spindle now before I can proceed > further. Good luck man. The spindle.hal file from vismach/vmc_toolchange ought to pretty much just slot in.

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Andy Pugh
> On 23 Jan 2016, at 17:55, Marius Alksnys wrote: > > As drive power stage takes two analog voltages as phase current commands > (third one is "calculated" inside), I am feeding them with sine signals, > calculated by custom HAL component, using 7i77 analog output

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread Drew Rogge
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] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Pete Matos
yup mine has everything original implemented already and all is working but I have to find a good way to orient spindle now before I can proceed further. Good luck man. Pete On Sat, Jan 23, 2016 at 12:38 PM, Marius Alksnys wrote: > I coded and tested spindle

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread Peter Blodow
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] How to find old Bosch drive manuals?

2016-01-23 Thread alex chiosso
Hi Marius. What is good to see is that you have about the complete documentation needed. I do believe that if you will find the electrical cabinet wiring schematic you should be able to do this massive job. This machine is equipped with quite a big PLC with many I/O (so automatic tool changer and

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Dave Cole
Interesting. Are the two sine waves being fed to the drive 120 degrees out of phase or something similar? So does the sine wave amplitude ramp up according the motor speed? Dave On 1/23/2016 12:55 PM, Marius Alksnys wrote: > Spindle motor is, as written on the nameplate, High-performance >

Re: [Emc-users] How to find old Bosch drive manuals?

2016-01-23 Thread Marius Alksnys
Alex, you found out more in less time and from part of the info I had :) I see there are external Heidenhain EXE, which can stay there, unless I would replace servo drives to something like stmbl. I haven't noticed linear scales yet, maybe next time I will look for them. I was assured I will

Re: [Emc-users] How to find old Bosch drive manuals?

2016-01-23 Thread Marius Alksnys
01/23/2016 10:43 AM, alex chiosso rašė: > Hi Marius. > Do you have a picture of the drive and the whole electrical cabinet ? > The drive should be a Bosch Servodyn but as you noticed it's quite > difficult to find out any docs. > This mainly because the SPM coding for Bosch (Rexroth-Indramat)

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread Gene Heskett
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] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Marius Alksnys
I am planning to finish to retrofit Cincinnati Arrow 750 with LinuxCNC in several weeks completely. This includes hacked VFS spindle drive for 9kW 10kRPM spindle and automatic tool changer. I did not succeed to revive VFS to its original state, so I chose very strange way - to hack it and

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread Gene Heskett
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] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Dave Cole
Are you using an encoder to commutate the motor? Or just firing the windings in order? Is the original motor a regular induction motor or some brushless AC, brushless DC motor variant ? Dave On 1/23/2016 12:06 PM, Marius Alksnys wrote: > I am planning to finish to retrofit Cincinnati Arrow

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Dave Cole
That's nice! :-) Dave On 1/23/2016 4:48 PM, Marius Alksnys wrote: > 01/23/2016 08:39 PM, Dave Cole rašė: >> Interesting. >> >> Are the two sine waves being fed to the drive 120 degrees out of phase >> or something similar? >> >> So does the sine wave amplitude ramp up according the motor speed?

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread Gene Heskett
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] LinuxCNC for retrofit of Cincinnati Milacron CNC?

2016-01-23 Thread Marius Alksnys
01/23/2016 08:39 PM, Dave Cole rašė: > Interesting. > > Are the two sine waves being fed to the drive 120 degrees out of phase > or something similar? > > So does the sine wave amplitude ramp up according the motor speed? > > Dave Yes, 120 degrees. In spin / velocity mode amplitude I_out is

Re: [Emc-users] Rigid tapping speed advice

2016-01-23 Thread Jon Elson
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

2016-01-23 Thread Bengt Sjölund
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