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

2017-03-23 Thread hubert
On 3/23/17 5:38 PM, andy pugh wrote: > On 23 March 2017 at 22:20, hubert wrote: >> My Bad it should have been this link >> http://www.ebay.co.uk/itm/Harmonic-drive-systems-Used-FHA-40C-100-E250-AC-Servo-Actuator-/111964401976?hash=item1a11993138:g:3JsAAOSwSzdXCcXg > Don't rush

Re: [Emc-users] More Renishaw questions

2017-03-23 Thread Dave Caroline
Ken I have a LT02 and that is switched on by a just about any infrared pulse waveform and the return appears to be 115k baud optical, I am building my own OMM with an arduino MI as soon as I get around to it, had to get a fast opto diode an opto transistor I first obtained was deaf and too slow

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

2017-03-23 Thread andy pugh
On 23 March 2017 at 22:20, hubert wrote: > My Bad it should have been this link > http://www.ebay.co.uk/itm/Harmonic-drive-systems-Used-FHA-40C-100-E250-AC-Servo-Actuator-/111964401976?hash=item1a11993138:g:3JsAAOSwSzdXCcXg Don't rush into buying one. I set up a search on eBay

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

2017-03-23 Thread hubert
On 3/23/17 5:06 PM, andy pugh wrote: > On 23 March 2017 at 21:45, hubert wrote: >> I am contemplating purchase of this one >> http://www.ebay.co.uk/itm/Harmonic-drive-systems-Used-FHA-17C-100-E250-AC-Servo-Actuator-/111964389396?hash=item1a11990014:g:jCQAAOSwjMJXCcGL >> If I read

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

2017-03-23 Thread andy pugh
On 23 March 2017 at 21:45, hubert wrote: > I am contemplating purchase of this one > http://www.ebay.co.uk/itm/Harmonic-drive-systems-Used-FHA-17C-100-E250-AC-Servo-Actuator-/111964389396?hash=item1a11990014:g:jCQAAOSwjMJXCcGL > If I read it right it has 100 to one step down ratio

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

2017-03-23 Thread andy pugh
On 23 March 2017 at 21:24, hubert wrote: > I think I will buy the camlocks and start there. I like your split > model but how would you machine the recesses for the cam lock? ball > mill? You mention making a casting. Do you think it would accommodate > the 40 MM size as well?

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

2017-03-23 Thread hubert
On 3/23/17 4:13 PM, andy pugh wrote: > On 23 March 2017 at 20:33, hubert wrote: >> I found this >> http://harmonicdrive.de/mage/media/catalog/category/1018853_FHA_C_en.pdf >> reference on harmonic drives >> and noticed the 25 or 32 etc in the model number seemed to reflect >>

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

2017-03-23 Thread hubert
On 3/23/17 3:14 PM, andy pugh wrote: > On 23 March 2017 at 17:01, hubert wrote: >> I have a Grizzly G0709 lathe and they offer these as spare parts. >> >> http://www.grizzly.com/parts/P07090108?utm_campaign=zPage_source=grizzly.com > Do they list the entire spindle? It would

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

2017-03-23 Thread andy pugh
On 23 March 2017 at 20:33, hubert wrote: > I found this > http://harmonicdrive.de/mage/media/catalog/category/1018853_FHA_C_en.pdf > reference on harmonic drives > and noticed the 25 or 32 etc in the model number seemed to reflect > approximately the internal bore of the hollow

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

2017-03-23 Thread hubert
On 3/23/17 2:09 PM, andy pugh wrote: > On 23 March 2017 at 18:15, hubert wrote: >> SkyFire the builder of my mill offers a complete >> ready to hook to my Mesa 7I86 8" Harmonic Drive for about $2000. It >> isn't my dream solution, but doesn't break my bank either. > Looking at

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

2017-03-23 Thread andy pugh
On 23 March 2017 at 17:01, hubert wrote: > I have a Grizzly G0709 lathe and they offer these as spare parts. > > http://www.grizzly.com/parts/P07090108?utm_campaign=zPage_source=grizzly.com Do they list the entire spindle? It would save some machining. -- atp "A motorcycle is

Re: [Emc-users] More Renishaw questions

2017-03-23 Thread andy pugh
On 23 March 2017 at 18:28, Ken Strauss wrote: > >From postings on this list earlier this year I believe that Sarah Armstrong > and Rene Hopf (and perhaps others) have had some success interfacing to a > Renishaw MP10 or similar probe. I recently got an MP7 so I'm very

Re: [Emc-users] More Renishaw questions

2017-03-23 Thread Ken Strauss
I haven't managed to find an OMM + MI7 for an affordable price (this is only a hobby). My current plan (hope) is to build the equivalent of an OMM. I assume that what is required is something like a Vishay TEMD1000 photodiode feeding a TIA and then follow with an Arduino or something similar to

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

2017-03-23 Thread andy pugh
On 23 March 2017 at 18:15, hubert wrote: > SkyFire the builder of my mill offers a complete > ready to hook to my Mesa 7I86 8" Harmonic Drive for about $2000. It > isn't my dream solution, but doesn't break my bank either. Looking at the spec and the screws holding the rotary

Re: [Emc-users] More Renishaw questions

2017-03-23 Thread Erik Friesen
Do you have an OMI, or are you trying to connect directly with your own? On Thu, Mar 23, 2017 at 2:28 PM, Ken Strauss wrote: > >From postings on this list earlier this year I believe that Sarah > Armstrong > and Rene Hopf (and perhaps others) have had some success

[Emc-users] More Renishaw questions

2017-03-23 Thread Ken Strauss
>From postings on this list earlier this year I believe that Sarah Armstrong and Rene Hopf (and perhaps others) have had some success interfacing to a Renishaw MP10 or similar probe. I recently got an MP7 so I'm very interested. Can anyone provide details of the electronics that they used used

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

2017-03-23 Thread hubert
On 3/23/17 10:01 AM, andy pugh wrote: > On 23 March 2017 at 01:23, hubert wrote: >> How are you approaching this project? I am assuming that you >> are starting with a plate that will be attached to the 4th axis and >> machining that plate to accept the cam lock studs and cam

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

2017-03-23 Thread andy pugh
On 23 March 2017 at 17:49, hubert wrote: > If you look in the GO790 Manual or parts list it shows the part. Here is a way to make a nose with "embedded" screw heads. http://a360.co/2mUXk6s You can see inside with the "explode" slider. I might even make mine this way, it will

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

2017-03-23 Thread hubert
Should be GO709 http://www.grizzly.com/products/g0709/parts On 3/23/17 12:49 PM, hubert wrote: > If you look in the GO790 Manual or parts list it shows the part. > > > On 3/23/17 12:20 PM, andy pugh wrote: >> On 23 March 2017 at 17:01, hubert wrote: >>> I have a Grizzly G0709

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

2017-03-23 Thread hubert
If you look in the GO790 Manual or parts list it shows the part. On 3/23/17 12:20 PM, andy pugh wrote: > On 23 March 2017 at 17:01, hubert wrote: >> I have a Grizzly G0709 lathe and they offer these as spare parts. >>

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

2017-03-23 Thread andy pugh
On 23 March 2017 at 17:01, hubert wrote: > I have a Grizzly G0709 lathe and they offer these as spare parts. > http://www.grizzly.com/parts/P07090108?utm_campaign=zPage_source=grizzly.com Pity there is no picture to be sure that it is the right part. -- atp "A motorcycle is a

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

2017-03-23 Thread Nicklas Karlsson
> Hello Everybody, > > what Sebastian so eloquently described is what I originally meant, > however what the other people that replied added is also relevant I > think. The linear velocity phase results in a constant acceleration that > will have a Dirac delta function in its first order

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

2017-03-23 Thread hubert
I have a Grizzly G0709 lathe and they offer these as spare parts. http://www.grizzly.com/parts/P07090108?utm_campaign=zPage_source=grizzly.com On 3/23/17 10:01 AM, andy pugh wrote: > On 23 March 2017 at 01:23, hubert wrote: >> In my >> case I can get a complete set(6 ea) of

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

2017-03-23 Thread andy pugh
On 23 March 2017 at 01:23, hubert wrote: > In my > case I can get a complete set(6 ea) of locks from my Lathe source for US > $36. Link? -- 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] Thing with a square hole

2017-03-23 Thread andy pugh
On 23 March 2017 at 01:23, hubert wrote: > How are you approaching this project? I am assuming that you > are starting with a plate that will be attached to the 4th axis and > machining that plate to accept the cam lock studs and cam locks. In my > case I can get a complete

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

2017-03-23 Thread Gene Heskett
On Thursday 23 March 2017 07:01:19 MH wrote: > Hello Everybody, > > what Sebastian so eloquently described is what I originally meant, > however what the other people that replied added is also relevant I > think. The linear velocity phase results in a constant acceleration > that will have a

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

2017-03-23 Thread MH
Hello Everybody, what Sebastian so eloquently described is what I originally meant, however what the other people that replied added is also relevant I think. The linear velocity phase results in a constant acceleration that will have a Dirac delta function in its first order derivative, and

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

2017-03-23 Thread Nicklas Karlsson
Robust control work so well research in control theory has really dried, then can you tell me how to make robust control so we could change from PID with feed forward to robust control? 2017-03-22 23:28 GMT+01:00 Eric Keller : > I think you want to use feed-forward terms as