Re: [Emc-users] rotary tables, was Home switches.

On Saturday 26 May 2018 23:26:14 Jon Elson wrote: > On 05/26/2018 10:21 PM, Gene Heskett wrote: > > On Saturday 26 May 2018 19:35:20 Ken Strauss wrote: > >> I haven't found a North American supplier but shipping by ArcEuro > >> only takes a few days. I recently got an ER40 square/hex pair from >

Re: [Emc-users] rotary tables, was Home switches.

On 05/26/2018 10:21 PM, Gene Heskett wrote: On Saturday 26 May 2018 19:35:20 Ken Strauss wrote: I haven't found a North American supplier but shipping by ArcEuro only takes a few days. I recently got an ER40 square/hex pair from them. At current exchange rates 1 UKP is about us$1.14. Note, VAT

Re: [Emc-users] rotary tables, was Home switches.

On Saturday 26 May 2018 19:35:20 Ken Strauss wrote: > I haven't found a North American supplier but shipping by ArcEuro only > takes a few days. I recently got an ER40 square/hex pair from them. At > current exchange rates 1 UKP is about us$1.14. Note, VAT does not > apply to shipments to outside

Re: [Emc-users] rotary tables, was Home switches.

On Saturday 26 May 2018 19:35:20 Ken Strauss wrote: > I haven't found a North American supplier but shipping by ArcEuro only > takes a few days. I recently got an ER40 square/hex pair from them. At > current exchange rates 1 UKP is about us$1.14. Note, VAT does not > apply to shipments to outside

Re: [Emc-users] rotary tables, was Home switches.

I haven't found a North American supplier but shipping by ArcEuro only takes a few days. I recently got an ER40 square/hex pair from them. At current exchange rates 1 UKP is about us$1.14. Note, VAT does not apply to shipments to outside the EU so assume 1 pound = 1 dollar. > -Original

Re: [Emc-users] 7i90 not listed in pnc

On Sat, May 26, 2018, 06:47 andy pugh wrote: > On 25 May 2018 at 13:47, jeremy youngs wrote: > > >> I have no idea what it is, I may just find out today . > > It definitely looks like an Optek logo, part number and date code > >

Re: [Emc-users] 7i90 not listed in pnc

On Sat, May 26, 2018, 08:04 Bengt Sjölund wrote: > I have used ITR8307 succesfully. > http://www.93x57r.se/tecno-cnc/images/CNC3000/opto%20sp-speed%202.jpg > http://www.everlight.com/file/ProductFile/ITR8307.pdf > > > You are suggesting replacing the opto'd with this ? That

Re: [Emc-users] 7i90 not listed in pnc

On Thu, May 24, 2018, 00:33 Ralph Stirling wrote: > I like to use Machine -> "Show Hal Configuration", which lets you see > and set any pin, and watch pins or signals. More convenient > than halmeters in my opinion. Halscope has a bit of a learning > curve. >

Re: [Emc-users] rotary tables, was Home switches.

On Saturday 26 May 2018 18:58:32 Gene Heskett wrote: > On Saturday 26 May 2018 18:20:14 andy pugh wrote: > > On 25 May 2018 at 17:47, Gene Heskett wrote: > > > Its a piece of India made 4" junk. > > > Handy for facing bolt head flats, > > > > I tend to use these for that: >

Re: [Emc-users] rotary tables, was Home switches.

On Saturday 26 May 2018 18:20:14 andy pugh wrote: > On 25 May 2018 at 17:47, Gene Heskett wrote: > > Its a piece of India made 4" junk. > > Handy for facing bolt head flats, > > I tend to use these for that: >

Re: [Emc-users] rotary tables, was Home switches.

On 25 May 2018 at 17:47, Gene Heskett wrote: > Its a piece of India made 4" junk. > Handy for facing bolt head flats, I tend to use these for that: http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Fixtures/ER32-Collet-Blocks Much quicker to set up. Just hold the

Re: [Emc-users] Spindle Motors

On Sat, May 26, 2018, 15:20 andy pugh wrote: > On 26 May 2018 at 20:49, jeremy youngs wrote: > > >> I want to use one clutch and two sprags for a compact envelope  > > That ought to work and might be easier to package. > > I overhaul transmissions and

Re: [Emc-users] Spindle Motors

On 26 May 2018 at 20:49, jeremy youngs wrote: >> I want to use one clutch and two sprags for a compact envelope  That ought to work and might be easier to package. The one-way roller clutch bearings are pretty cheap:

Re: [Emc-users] Spindle Motors

On 05/26/2018 02:35 PM, Chris Albertson wrote: The Toyota Prius-C uses a 10 HP electric DC motor and an electrically controlled step-less continuously variable transmission. The Honda Civic hybrids also have a CVT and some kind of motor to run the belt up and down. This might be a bit too

[Emc-users] Spindle Motors

Depending on what ratio's you want, you could use 4 pulleys; on the motor, big and small, pulleys stacked on the spindle, small and big, pulleys stacked Obviously these pairs will give you step up, step down, but you could use other pairs, maybe 1:1 and 1:3 for step down. Now you use two belts

Re: [Emc-users] Spindle Motors

On Sat, May 26, 2018, 13:32 andy pugh wrote: > On 26 May 2018 at 19:20, Jon Elson wrote: > > > I don't know what machine you have, but some machines have stock retrofit > > kits to replace the crummy Chinese drive scheme with something using high > >

Re: [Emc-users] Spindle Motors

On Sat, May 26, 2018 at 11:31 AM, andy pugh wrote: > On 26 May 2018 at 19:20, Jon Elson wrote: > >> I don't know what machine you have, but some machines have stock retrofit >> kits to replace the crummy Chinese drive scheme with something using high

Re: [Emc-users] Spindle Motors

Now that sounds interesting. John > > It isn't too hard to imagine a system using two permanently-engaged > different-ratio belt-drives and a couple of car air-conditioning > clutches to choose between them. > > -- > atp

Re: [Emc-users] Spindle Motors

On 26 May 2018 at 19:20, Jon Elson wrote: > I don't know what machine you have, but some machines have stock retrofit > kits to replace the crummy Chinese drive scheme with something using high > performance belts. It isn't too hard to imagine a system using two

Re: [Emc-users] Spindle Motors

On 05/26/2018 12:08 PM, John Dammeyer wrote: That motor can produce rated torque down to near zero speed. But, a belt reduction INCREASES torque as you lower spindle speed. In some cases like heavy fly cutting, face mills, boring, and drilling with large diameter drills, you need that extra

Re: [Emc-users] Spindle Motors

On 26 May 2018, at 16:13, Jon Elson wrote: >> > That motor can produce rated torque down to near zero speed. But, a belt > reduction INCREASES torque as you lower spindle speed. In some cases like > heavy fly cutting, face mills, boring, and drilling with large diameter > drills, you need

Re: [Emc-users] Spindle Motors

It's to replace the motor on this. http://www.grizzly.com/products/Vertical-Mill/G3616 AKA FRV30 from the now defunct House of Tools in Canada. http://www.autoartisans.com/milton.htm And yes I'd like to be able to have spindle positioning capability. These AC Servo motors are advertised as

Re: [Emc-users] Spindle Motors

> That motor can produce rated torque down to near zero > speed. But, a belt reduction INCREASES torque as you lower > spindle speed. In some cases like heavy fly cutting, face > mills, boring, and drilling with large diameter drills, you > need that extra torque. When I put my Bridgeport in

Re: [Emc-users] Encoders

On Sat, May 26, 2018 at 9:23 AM, Jon Elson wrote: > On 05/26/2018 10:54 AM, Chris Albertson wrote: >> >> I had to look up the link to see how it is possible for an encoder to >> cause lag. Only by not having enough resolution for low speed >> operations >> > The AMT

Re: [Emc-users] Encoders

On 05/26/2018 10:54 AM, Chris Albertson wrote: I had to look up the link to see how it is possible for an encoder to cause lag. Only by not having enough resolution for low speed operations The AMT encoders use interpolation of a very low resolution basic sensor. They must have some kind of

Re: [Emc-users] Encoders

On Sat, May 26, 2018, 10:54 Chris Albertson wrote: > I had to look up the link to see how it is possible for an encoder to > cause lag. Only by not having enough resolution for low speed > operations > > Did you notice the 20 week lead time and the note about

Re: [Emc-users] Encoders

I had to look up the link to see how it is possible for an encoder to cause lag. Only by not having enough resolution for low speed operations Did you notice the 20 week lead time and the note about problems at the factory? On Sat, May 26, 2018 at 4:40 AM, andy pugh wrote:

Re: [Emc-users] Encoders

On 05/26/2018 06:40 AM, andy pugh wrote: On 25 May 2018 at 07:24, jeremy youngs wrote: https://www.mouser.com/ProductDetail/CUI/AMT103-V?qs=sGAEpiMZZMsWp46O%252bq11Wc6D0rLp%252bQH%2fN7GEqDkL%2fc8%3d Any thoughts? Seems like a good solution I was expecting Jon Elson to

Re: [Emc-users] Spindle Motors

On 05/26/2018 12:24 AM, John Dammeyer wrote: Is something like this equivalent to a single phase 220VAC 2HP motor? https://www.ebay.ca/itm/122137567723 Just thinking of how I'll add variable speed to my mill. Would it even need a reduction set of pulleys or is 1:1 adequate? If the bearings

Re: [Emc-users] Encoders

On Saturday 26 May 2018 07:40:05 andy pugh wrote: > On 25 May 2018 at 07:24, jeremy youngs wrote: > > https://www.mouser.com/ProductDetail/CUI/AMT103-V?qs=sGAEpiMZZMsWp46 > >O%252bq11Wc6D0rLp%252bQH%2fN7GEqDkL%2fc8%3d Any thoughts? Seems like > > a good solution > > I was

Re: [Emc-users] Encoders

On Sat, May 26, 2018, 06:41 andy pugh wrote: > On 25 May 2018 at 07:24, jeremy youngs wrote: > > > > https://www.mouser.com/ProductDetail/CUI/AMT103-V?qs=sGAEpiMZZMsWp46O%252bq11Wc6D0rLp%252bQH%2fN7GEqDkL%2fc8%3d > > Any thoughts? Seems like a good

Re: [Emc-users] 7i90 not listed in pnc

I have used ITR8307 succesfully. http://www.93x57r.se/tecno-cnc/images/CNC3000/opto%20sp-speed%202.jpg http://www.everlight.com/file/ProductFile/ITR8307.pdf Den 2018-05-26 kl. 13:46, skrev andy pugh: On 25 May 2018 at 13:47, jeremy youngs wrote: I have no idea what it

Re: [Emc-users] Spindle Motors

On 26 May 2018 at 09:43, Gene Heskett wrote: > On Saturday 26 May 2018 01:24:36 John Dammeyer wrote: > >> Is something like this equivalent to a single phase 220VAC 2HP motor? >> >> https://www.ebay.ca/itm/122137567723 >> >> Just thinking of how I'll add variable speed to my

Re: [Emc-users] 7i90 not listed in pnc

On 25 May 2018 at 13:47, jeremy youngs wrote: >> I have no idea what it is, I may just find out today . It definitely looks like an Optek logo, part number and date code https://uk.rs-online.com/web/p/reflective-optical-sensors/6424301/ -- atp "A motorcycle is a

Re: [Emc-users] Encoders

On 25 May 2018 at 07:24, jeremy youngs wrote: > https://www.mouser.com/ProductDetail/CUI/AMT103-V?qs=sGAEpiMZZMsWp46O%252bq11Wc6D0rLp%252bQH%2fN7GEqDkL%2fc8%3d > Any thoughts? Seems like a good solution I was expecting Jon Elson to chip in. I think he found an odd

Re: [Emc-users] Spindle Motors

On Saturday 26 May 2018 01:24:36 John Dammeyer wrote: > Is something like this equivalent to a single phase 220VAC 2HP motor? > > https://www.ebay.ca/itm/122137567723 > > Just thinking of how I'll add variable speed to my mill. Would it > even need a reduction set of pulleys or is 1:1 adequate?