Re: [Emc-users] Switches for home, limits

On 30 Jul 2015, at 03:51, Gene Heskett wrote: > I bought a bag of small, roller tipped microswitches, and have a couple > mounts laid out but not carved yet. > > Going thru searches on ebay just now, for both inductive, capacitative, > and IR proximity switches, It sees like the majority of th

Re: [Emc-users] Gear hobbing machine

On 30 July 2015 at 07:16, Dave Caroline wrote: > Andy has implemented it on a mill > http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Hobbing I have now created a dedicated hobbing GladeVCP panel which performs basic gear calculations (including span across teeth for size checking) as well as running the

Re: [Emc-users] Switches for home, limits

A simple RC filter possibly combined with voltage division will remove noise although it will also reduce accuracy. I think low input impedance will fix the problem with noise because even though voltage may be high only a limited amount of current may be transferred by capacitive coupling or a

Re: [Emc-users] Gear hobbing machine

Sounds great. I bough a few hundred kilos of material probably intented for gears from bankcrupt company which i intend to use for testing machine. Nicklas Karlsson On Thu, 30 Jul 2015 10:09:51 +0100 andy pugh wrote: > On 30 July 2015 at 07:16, Dave Caroline wrote: > > Andy has implemented

Re: [Emc-users] Switches for home, limits

On 30 July 2015 at 08:02, Marcus Bowman wrote: > it would be useful if folks could put the pictures somewhere we could all see > them. I have been tending to embed inductive proxes in the machine somewhere with a drilled hole as the target. https://picasaweb.google.com/108164504656404380542/Harr

Re: [Emc-users] Before i go bonkers: M98, M99

Brilliant! Mark On Wed, Jul 29, 2015 at 6:19 PM, Sebastian Kuzminsky wrote: > I propose we make "I Kill Kokomo" the official code name of the next > release. > > > On 7/29/15 4:16 PM, Robert Ellenberg wrote: > > Sorry folks, it looks like I managed to butt-dial an email during my > > commute th

Re: [Emc-users] Before i go bonkers: M98, M99

On Wed, Jul 29, 2015 at 6:16 PM, Robert Ellenberg wrote: > Sorry folks, it looks like I managed to butt-dial an email during my > commute this morning. Crisis averted :) > > Rob > Uh huh. Suurre. ;-) Mark -- One Man, One Machine, One Computer! -

Re: [Emc-users] Before i go bonkers: M98, M99

On Thu, Jul 30, 2015 at 2:10 AM, George Ramsower wrote: > This is interesting. I've seen this sort of thing on other email lists > and thought it was some sort of spam or some type of malware. Now I > understand it's just a mistake. I never thought of this possibility! > Very interesting what

Re: [Emc-users] Switches for home, limits

On Thursday 30 July 2015 03:02:45 Marcus Bowman wrote: > On 30 Jul 2015, at 03:51, Gene Heskett wrote: > > I bought a bag of small, roller tipped microswitches, and have a > > couple mounts laid out but not carved yet. > > > > Going thru searches on ebay just now, for both inductive, > > capacitat

Re: [Emc-users] Switches for home, limits

Gene: I used (for better or worse) microswitches. X axis - you can see it to the left of one of the pics. Uses the original table stop and some of the screws that were in the table (for locking handles? can't remember off hand) http://cnc-for-model-engineers.blogspot.ca/2015/04/g0704-and-cnc-con

Re: [Emc-users] Switches for home, limits

On Thursday 30 July 2015 05:30:21 andy pugh wrote: > On 30 July 2015 at 08:02, Marcus Bowman > > wrote: > > it would be useful if folks could put the pictures somewhere we > > could all see them. > > I have been tending to embed inductive proxes in the machine somewhere > with a drilled hole as t

[Emc-users] Switches for home, limits

If you're going to use micro-switches, rather use this

Re: [Emc-users] Switches for home, limits

On 30 July 2015 at 12:20, Gene Heskett wrote: >> http://www.ebay.co.uk/itm/190836819378 >> > These need at least 12 volts and 10 ma to function. I assume you use them > as NC, opening when the hole is under the face? This would need some > sort of a logic combiner unless quite a few pins are dedi

Re: [Emc-users] Switches for home, limits

On Thursday 30 July 2015 07:03:29 John Alexander Stewart wrote: > Gene: > > I used (for better or worse) microswitches. > > X axis - you can see it to the left of one of the pics. Uses the > original table stop and some of the screws that were in the table (for > locking handles? can't remember of

Re: [Emc-users] Switches for home, limits

On Thursday 30 July 2015 07:28:16 Roland Jollivet wrote: > If you're going to use micro-switches, rather use this > 645&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D >504E266C753D656E266D6D3D6D61746368616

Re: [Emc-users] Switches for home, limits

There are high-precision switches (1 um repeatability, 10um deviation after 1,000,000 cycles) but they don't come cheap ($100) http://www.ia.omron.com/product/item/d5a_1100f/ -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto --

Re: [Emc-users] Switches for home, limits

On 30 July 2015 at 12:52, andy pugh wrote: > There are high-precision switches (1 um repeatability, 10um deviation > after 1,000,000 cycles) but they don't come cheap ($100) > > http://www.ia.omron.com/product/item/d5a_1100f/ They do an optical version too. I doubt they sell many: http://uk.rs-on

Re: [Emc-users] Switches for home, limits

Gene; The "no longer required" manual locks reminder gives me some additional > freedom as that had not occured to me. What had occured was how do I > keep them from being demolished if not correctly positioned? > > So that opens up additional possibilities, thanks John. > The X axis on mine; I

Re: [Emc-users] Gear hobbing machine

On Wed, Jul 29, 2015, at 09:35 PM, richsh...@comcast.net wrote: > I am adapting a version of the "little hobber" and want to use linux-CNC to > do the ratio division between the hob and the work spindles. Additionally, a > third axis that is actually the feed needs to be incorporated. Any thoug

Re: [Emc-users] Gear hobbing machine

I guess you have start calculation from the encoder counters each time and then there will be no problem with add up over time. Nicklas Karlsson On Thu, 30 Jul 2015 09:44:02 -0400 John Kasunich wrote: > > > On Wed, Jul 29, 2015, at 09:35 PM, richsh...@comcast.net wrote: > > I am adapting a

Re: [Emc-users] Gear hobbing machine

On 30 July 2015 at 15:23, Karlsson & Wang wrote: > I guess you have start calculation from the encoder counters each time and > then there will be no problem with add up over time. There is a danger of encoder counters rolling over the signed-32 HAL pin value. (though the counter are internally

Re: [Emc-users] Gear hobbing machine

John that same counting cleverness needs to be in or merged with the differential for helical gears to allow it all to remain in gear and have a fine feed and to move the cutter head back to be able to measure and take another shaving. http://www.collection.archivist.info/hobbing.html having used

Re: [Emc-users] Switches for home, limits

On Thursday 30 July 2015 07:52:31 andy pugh wrote: > There are high-precision switches (1 um repeatability, 10um deviation > after 1,000,000 cycles) but they don't come cheap ($100) > > http://www.ia.omron.com/product/item/d5a_1100f/ Amazing. I didn't think Omron made anything of that quality. C

Re: [Emc-users] Switches for home, limits

On Thursday 30 July 2015 08:50:22 John Alexander Stewart wrote: > Gene; > > The "no longer required" manual locks reminder gives me some > additional > > > freedom as that had not occured to me. What had occured was how do > > I keep them from being demolished if not correctly positioned? > > > >

Re: [Emc-users] Gear hobbing machine

On Thu, Jul 30, 2015, at 10:36 AM, Dave Caroline wrote: > John that same counting cleverness needs to be in or merged with the > differential > for helical gears to allow it all to remain in gear and have a fine > feed and to move the cutter head back to be able to measure and take > another shav

Re: [Emc-users] Gear hobbing machine

On Thu, Jul 30, 2015, at 10:33 AM, andy pugh wrote: > On 30 July 2015 at 15:23, Karlsson & Wang > wrote: > > I guess you have start calculation from the encoder counters each time and > > then there will be no problem with add up over time. > > There is a danger of encoder counters rolling ove

Re: [Emc-users] Gear hobbing machine

On 30 July 2015 at 17:43, John Kasunich wrote: > It would now > take 50 billion revolutions of the hob before the resolution caused a > one degree error. As my machine has a max spindle speed of 1000 rpm that leaves me pleasantly unconcerned. -- atp If you can't fix it, you don't own it. http:/

Re: [Emc-users] Possible lathe spindle encoder.

Has anyone found a source for the ATS694? Digikey doesn't have a listing... > -Original Message- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: Wednesday, July 29, 2015 3:38 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Possible lathe spindle encoder. > > A u

Re: [Emc-users] Gear hobbing machine

I've had an idea for a while that an old brake disc lathe would make a good base for a gear hobbing machine. It has a strong spindle where the disc mounts to fit the hob, and a slide at 90 degrees to it where a second spindle holding the gear blank could be mounted. --- This email has been che

Re: [Emc-users] Switches for home, limits

On Thursday 30 July 2015 08:50:22 John Alexander Stewart wrote: > Gene; > > The "no longer required" manual locks reminder gives me some > additional > > > freedom as that had not occured to me. What had occured was how do > > I keep them from being demolished if not correctly positioned? > > > >