Re: [Emc-users] Has anyone done this?

On 22 March 2017 at 12:05, Gene Heskett wrote: > That style isn't what I had in mind, Andy. External drive & extract > flange. Like these? http://bodgesoc.blogspot.de/2017/01/gears.html :-) -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed

Re: [Emc-users] Has anyone done this?

On 22 March 2017 at 12:05, Gene Heskett wrote: > It sounds like the adjective "taperlock" must lose something in > the translation, It must do. I interpret it as a noun. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use

Re: [Emc-users] Has anyone done this?

On Wednesday 22 March 2017 10:01:58 andy pugh wrote: > On 22 March 2017 at 12:05, Gene Heskett wrote: > > It sounds like the adjective "taperlock" must lose something in > > the translation, > > It must do. I interpret it as a noun. I believe it may be that too, and that

Re: [Emc-users] Thing with a square hole

On 22 March 2017 at 12:48, Dave Cole wrote: > Andy, where does that part go in a 4th axis assembly? I have a D1-4 spindle on my lathe, and several chucks, collets, faceplates etc to suit. So the plan is to make my 4th axis with a D1-4 face so that I can use the same

Re: [Emc-users] Has anyone done this?

On Wednesday 22 March 2017 10:04:52 andy pugh wrote: > On 22 March 2017 at 12:05, Gene Heskett wrote: > > That style isn't what I had in mind, Andy. External drive & extract > > flange. > > Like these? > http://bodgesoc.blogspot.de/2017/01/gears.html > > :-) Same basic

Re: [Emc-users] Thing with a square hole

On Wednesday 22 March 2017 10:39:11 andy pugh wrote: > On 22 March 2017 at 12:48, Dave Cole wrote: > > Andy, where does that part go in a 4th axis assembly? > > I have a D1-4 spindle on my lathe, and several chucks, collets, > faceplates etc to suit. So the plan is to

[Emc-users] Different acceleration profiles - something that would remove the discontinuity in the first derivative of the acceleration ?

Hello, I want to ask if anybody has worked on different acceleration profiles for linuxcnc ? I am looking for something that would remove the discontinuity in the first derivative of the acceleration ? BR Max. --

Re: [Emc-users] Different acceleration profiles - something that would remove the discontinuity in the first derivative of the acceleration ?

> Hello, > > I want to ask if anybody has worked on different acceleration profiles > for linuxcnc ? I am looking for something that would remove the > discontinuity in the first derivative of the acceleration ? > > BR > Max. I guess to start with the DC motor model for example here

Re: [Emc-users] Different acceleration profiles - something that would remove the discontinuity in the first derivative of the acceleration ?

On Wed, 22 Mar 2017, Sebastian Kuzminsky wrote: > Date: Wed, 22 Mar 2017 13:03:06 -0600 > From: Sebastian Kuzminsky > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)"

Re: [Emc-users] Different acceleration profiles - something that would remove the discontinuity in the first derivative of the acceleration ?

On 03/22/2017 12:50 PM, Nicklas Karlsson wrote: >> Hello, >> >> I want to ask if anybody has worked on different acceleration profiles >> for linuxcnc ? I am looking for something that would remove the >> discontinuity in the first derivative of the acceleration ? >> >> BR >> Max. > > I guess to

Re: [Emc-users] Different acceleration profiles - something that would remove the discontinuity in the first derivative of the acceleration ?

> >> Hello, > >> > >> I want to ask if anybody has worked on different acceleration profiles > >> for linuxcnc ? I am looking for something that would remove the > >> discontinuity in the first derivative of the acceleration ? > >> > >> BR > >> Max. > > > > I guess to start with the DC motor model

Re: [Emc-users] Different acceleration profiles --> jerk limit

> On 03/22/2017 12:50 PM, Nicklas Karlsson wrote: > >> Hello, > >> > >> I want to ask if anybody has worked on different acceleration profiles > >> for linuxcnc ? I am looking for something that would remove the > >> discontinuity in the first derivative of the acceleration ? > >> > >> BR > >>

Re: [Emc-users] Different acceleration profiles --> state feedback control

Acceleration profile is a little related to feedback loop. I have worked with state feedback control instead of PID for a while and it works great although adding integrator have puzzled me a little bit. Ordinary integrator works between set reference value and measured value and this will

Re: [Emc-users] Thing with a square hole

OK... 4th axis chuck.I get it. Thanks, Dave On 3/22/2017 9:18 AM, Eric Keller wrote: > 3(?) of them hold the chuck on the spindle. When Andy first asked > about it, it didn't sink in what he was asking about. My lathe was > much nicer when I replaced the cams on the spindle, before that it

Re: [Emc-users] Thing with a square hole

On 22 March 2017 at 23:33, Dave Cole wrote: > OK... 4th axis chuck.I get it. Well, to be clear, a 4th-axis spindle-nose -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and

Re: [Emc-users] Different acceleration profiles --> state feedback control (error in sign)

I think you want to use feed-forward terms as well. If you look at robust control, which pretty much obliterated pole-placement and optimal state feedback control, the general case includes feed-forward terms. This negates the problem that there always has to be an error in order for there to be

Re: [Emc-users] Different acceleration profiles --> state feedback control (error in sign)

There is an error in sign, it should be: (angle_ref - angle_mesaured)*gain1 + (velocity_ref - velocity_measured)*gain2 + (current_ref - current_measured)*gain3. From the set reference value for position the model is used used to calculate set reference value for all three values. There may also

Re: [Emc-users] Thing with a square hole

Andy I really like your Idea of using the Cam lock approach for a 4Axis chuck adapter. In my case I have 3 chucks for my lathe that uses D1-5 spindle so it gives much versatility If I could also use them on my 4th Axis. How are you approaching this project? I am assuming that you are

Re: [Emc-users] nother idea for a jog dial

On Wednesday 22 March 2017 03:58:44 Chris Albertson wrote: > Gene, > > I keep many of those small rotary encoders in my parts drawer. Some > have better "feel" and the best ones have a click button feature where > you can push the knob in as a momentary contact. With out the push > feature they

Re: [Emc-users] nother idea for a jog dial

On 22 March 2017 at 11:07, Gene Heskett wrote: > Most annoying ATM is that I have to jog the axis from the keyboard before > my jog inputs work, This must be a "feature" of your config, as my lathe doesn't even have a keyboard and jogs fine. -- atp "A motorcycle is a

[Emc-users] nother idea for a jog dial

Greetings all; While perusing the mpja.com catalog just now, I came across an item that could be used as the jog dial, with very similar hal code, its an auto radio etc power/volume control, stock 30403-SW on page 97, right hand column. 2 bucks. That thing can't be anything but a mechanical

Re: [Emc-users] nother idea for a jog dial

Gene, I keep many of those small rotary encoders in my parts drawer. Some have better "feel" and the best ones have a click button feature where you can push the knob in as a momentary contact. With out the push feature they are not useful. $2 is a decent price. I've paid less but why care

Re: [Emc-users] Thing with a square hole

On 22 March 2017 at 02:55, Chris Albertson wrote: > I missed the beginning of this thread. But the thing used to cut square > internal corners is a "broach". Yes, I know. And I have both used and made them in the past.

Re: [Emc-users] Has anyone done this?

On 22 March 2017 at 03:35, Gene Heskett wrote: > So, once I get the bronze bearings I found in it pushed out and the > needle cartridges that were supposed to be in it, pushed in, the next > step I am considering is, since the left face of the pulley is hollowed > out,

Re: [Emc-users] Has anyone done this?

On 22 March 2017 at 09:53, andy pugh wrote: > More expensive, but much easier to prepare the pulley for, would be a > Trantorque: > http://www.fennerdrives.com/trantorque/_/Trantorque-OE-7/8/ > That needs a 1 3/8" plain bore in the pulley. I just noticed how much more

Re: [Emc-users] Thing with a square hole

Andy, where does that part go in a 4th axis assembly? Is that a cam lock component ?? Thanks, Dave On 3/22/2017 5:40 AM, andy pugh wrote: > On 22 March 2017 at 02:55, Chris Albertson wrote: >> I missed the beginning of this thread. But the thing used to cut

Re: [Emc-users] Has anyone done this?

On Wednesday 22 March 2017 05:53:32 andy pugh wrote: > On 22 March 2017 at 03:35, Gene Heskett wrote: > > So, once I get the bronze bearings I found in it pushed out and the > > needle cartridges that were supposed to be in it, pushed in, the > > next step I am considering

Re: [Emc-users] nother idea for a jog dial

On Wednesday 22 March 2017 07:20:05 andy pugh wrote: > On 22 March 2017 at 11:07, Gene Heskett wrote: > > Most annoying ATM is that I have to jog the axis from the keyboard > > before my jog inputs work, > > This must be a "feature" of your config, as my lathe doesn't even

Re: [Emc-users] Thing with a square hole

3(?) of them hold the chuck on the spindle. When Andy first asked about it, it didn't sink in what he was asking about. My lathe was much nicer when I replaced the cams on the spindle, before that it was problematic to get a chuck on and off. On Wed, Mar 22, 2017 at 8:48 AM, Dave Cole