Re: [Emc-users] More news & ? from WV.

i tend to use aluminium forms when i need to make hundereds and that when some tollerance of fit is needed more for robustnes , wooden forms are fine for one offs , but the newer composite form material it's easier to form by cnc and quicker than using wood and then treating the forms with resin

Re: [Emc-users] Clearpath Servo For Lathe Spindle?

On 17 August 2016 at 03:37, Martin Dobbins wrote: > > https://www.teknic.com/products/clearpath-brushless-dc-servo-motors/ > > The trouble is I know nothing about servo driven spindles, would they have > the same problem with poor torque at low revs that the Sherline DC motor

Re: [Emc-users] Linear Rail Guard

On 17.08.16 05:57, linden wrote: > I have a 6" by 50ft roll that is time expired that i have had for > 15 year and it is still good as far as I can tell. Another data-point: The bit of mylar drawing film I have is 36 years old, and indistinguishable from the day it was made. I'll have to find

Re: [Emc-users] More news & ? from WV.

On Wednesday 17 August 2016 05:29:37 andy pugh wrote: > On 16 August 2016 at 23:49, Gene Heskett wrote: > > The local casting shop seems to be using machined alu forms, and I > > have seen no evidence they can take a pattern & do all the work to > > make it sand castable. I

Re: [Emc-users] Clearpath Servo For Lathe Spindle?

On Tuesday 16 August 2016 22:37:48 Martin Dobbins wrote: > Sherline lathe motors are not known for torque at very low speeds, > which is probably why Sherline sells this piece of kit for cnc > threading: > > http://sherline.com/product/6500-stepper-motor-mounting-kit/ > > This will work (very

Re: [Emc-users] More news & ? from WV.

On Wednesday 17 August 2016 06:17:26 Sarah Armstrong wrote: > i tend to use aluminium forms when i need to make hundereds and that > when some tollerance of fit is needed > more for robustnes , wooden forms are fine for one offs , but the > newer composite form material it's easier to form by cnc

Re: [Emc-users] More news & ? from WV.

On 17 August 2016 at 11:17, Sarah Armstrong wrote: > but the newer > composite form material it's easier to form by cnc > and quicker than using wood and then treating the forms with resin or > filler and sanding etc . Yes, though not inexpensive:

Re: [Emc-users] Linear Rail Guard

I use mylar tape from time to time as anti chaff and to put a clear protective cote over decals. Its not cheep but 3m makes it in several different sizes and thicknesses it is a lot more durable than duct tape. If you know any helicopter mechanics in your area im sure some one would have some

Re: [Emc-users] More news & ? from WV.

On Wednesday 17 August 2016 10:07:41 andy pugh wrote: > On 17 August 2016 at 11:17, Sarah Armstrong > > wrote: > > but the newer > > composite form material it's easier to form by cnc > > and quicker than using wood and then treating the forms with resin > > or

Re: [Emc-users] More news & ? from WV.

On Tue, Aug 16, 2016, at 01:54 PM, andy pugh wrote: > > Have you considered having a casting made? You seem to enjoy > woodworking, so pattern making shouldn't be too hard for you. > I think foundries that are willing to do one-off jobs for random guys off the street are far less common on

Re: [Emc-users] snagged touch probe on eBay - anybody know how to interface ?

On 08/17/2016 01:52 AM, Gregg Eshelman wrote: > With all those lights, it may be an alien probe. ;) > Close Encounters of the Third Kind (6/8) Movie CLIP - Communicating with the > Mothership (1977) HD > I watched an online video, and it blinked a regular pattern on the green LED, and changed to

Re: [Emc-users] snagged touch probe on eBay - anybody know how to interface ?

Hi Jon > And, the info available from Blum is only > sales info, with no user manual or anything that > I can find. I had a quick look and fond a lot of info on the TC60. Its identical to the TC50 except it uses radio instead of IR. The features, LEDs, etc. should be the same, I guess. Here

Re: [Emc-users] More news & ? from WV.

I also did a few years back and one of the local foundrys would do 1 offs.. I don't know if they still do. it was dollars a pound though. (don't remember exactly) On 8/17/2016 9:25 AM, John Kasunich wrote: > > On Tue, Aug 16, 2016, at 01:54 PM, andy pugh wrote: >> Have you considered having

Re: [Emc-users] Clearpath Servo For Lathe Spindle?

Gene wrote: >Looking at the torque curves of the SDSK series, and the steady state >available powers, for a spindle drive the steady state limit is the >important one, and its much lower than its peak torque while moving to a >fixed position. You have to get large and ex$pen$ive to get steady

Re: [Emc-users] More news & ? from WV.

Have a look at this. Wouldn't be surprised to see foundries doing this for low volumes of castings. If PLA can be injection, blow or roto molded to make the shells, it could be used for high volume production with fewer rejected castings since there's no chance of wrecking the sand molds

Re: [Emc-users] More news & ? from WV.

On 16 August 2016 at 23:49, Gene Heskett wrote: > The local casting shop seems to be using machined alu forms, and I have > seen no evidence they can take a pattern & do all the work to make it > sand castable. I haven't toured the whole place, so I've not seen the >

Re: [Emc-users] snagged touch probe on eBay - anybody know how to interface ?

With all those lights, it may be an alien probe. ;) Close Encounters of the Third Kind (6/8) Movie CLIP - Communicating with the Mothership (1977) HD | | | | || | | | || Close Encounters of the Third Kind (6/8) Movie CLIP - Communicating with th... Close

Re: [Emc-users] Clearpath Servo For Lathe Spindle?

On 17 August 2016 at 22:54, Martin Dobbins wrote: > It's very difficult (for me, at least) to compare a stepper motor to one of > these because the torque of a stepper is going to fall off rapidly with > speed. The stepper used is so huge, however, how much torque will it

Re: [Emc-users] Clearpath Servo For Lathe Spindle?

>I would be surprised if a stepper of that size makes any torque at all >at 1500 rpm. >Is there a performance curve anywhere on t'internet? What was I typing??? I meant 500 rpm Martin I would be surprised if a stepper of that size makes any torque at all

Re: [Emc-users] snagged touch probe on eBay - anybody know how to interface ?

On 08/17/2016 01:01 PM, Florian Rist wrote: > Hi Jon > >> And, the info available from Blum is only >> sales info, with no user manual or anything that >> I can find. > I had a quick look and fond a lot of info on the TC60. Its identical to > the TC50 except it uses radio instead of IR. The

Re: [Emc-users] More news & ? from WV.

Link? > -Original Message- > From: Gregg Eshelman [mailto:g_ala...@yahoo.com] > Sent: Wednesday, August 17, 2016 7:02 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] More news & ? from WV. > > Have a look at this. Wouldn't be surprised to see foundries doing this for

Re: [Emc-users] Clearpath Servo For Lathe Spindle?

That depends on 2 things, Martin. 1. And likely the most important by far, is the coil inductance. A motor with only 2 millihenry's of inductance can achieve full coil currents quick enough to have usable torque at 500 rpms. The same motor frame, wound for the same starting torque but has a 15

Re: [Emc-users] Clearpath Servo For Lathe Spindle?

On Wednesday 17 August 2016 17:54:46 Martin Dobbins wrote: > Gene wrote: > >Looking at the torque curves of the SDSK series, and the steady state > >available powers, for a spindle drive the steady state limit is the > >important one, and its much lower than its peak torque while moving > > to a

Re: [Emc-users] Clearpath Servo For Lathe Spindle?

On Wednesday 17 August 2016 22:39:46 Martin Dobbins wrote: > That depends on 2 things, Martin. > 1. And likely the most important by far, is the coil inductance. > > A motor with only 2 millihenry's of inductance can achieve full coil > currents quick enough to have usable torque at 500 rpms.

Re: [Emc-users] Linear Rail Guard

I got the quote back and for $200 I can get a new one. for $100 I can get 33.4 METER-LN of the hinge material. I assume that is 33.4 meters of the hinge which is about 109.58' of hinge material. I need about 32' of hinge material for that one and would have a lot left over... now to see if I