[Emc-users] Very low backlash ballscrews [Was: Re: How does this work?

There are many images available. Here is a site with such; https://www.hobbytronics.co.za/p/943/ball-screw-and-nut-sfu1605 On 21 May 2018 at 07:29, Chris Albertson wrote: > Go to eBay and search for "SFU1605" That is a 16mm diameter by 5mm pitch > screw. These

Re: [Emc-users] Very low backlash ballscrews [Was: Re: How does this work?

Go to eBay and search for "SFU1605" That is a 16mm diameter by 5mm pitch screw. These come with nuts that had best NEVER be removed I could not find drawing of the part anyplace so I made one myself. If you want I have .STEP file These screws are a standard part and come of different

Re: [Emc-users] How does this work?

On Sunday 20 May 2018 18:37:54 Frank Tkalcevic wrote: > > I paid abut $30 for a very good 16mm diameter by > > 500mm long zero backlash ball screw and nut. Yes truly "zero" > > there seem to be two ball nuts working in opposition. If there is > > backlash on the > > $30 > > > screw it is less

Re: [Emc-users] How does this work?

> I paid abut $30 for a very good 16mm diameter by > 500mm long zero backlash ball screw and nut. Yes truly "zero" there seem > to be two ball nuts working in opposition. If there is backlash on the $30 > screw it is less them by dial indicator can show. Where did you find these? Most

Re: [Emc-users] How does this work?

Roland Jollivet wrote: This might be worth it, depending on what it goes for.. I'd consider that a good deal. We would make the bid if it were not so far away. We live in Northern

Re: [Emc-users] index-enable pin

Not that fast. even if you round 704750 up to a million that is one microsecond per count. On a modern Intel CPU core you might be able to execute 5,000 or more machine instructions in microsecond. 20,000 if you have four cores. On a Raspberry Pi CPU core it is about 1,000 machine

Re: [Emc-users] makeing tap hats, from brass rod

On 20 May 2018 at 15:26, Gene Heskett wrote: >> https://www.ebay.com/itm/131375282525 > > That looks a lot like an engraving bit, same as I use for making PCB's, No, not at all. Engraving bits have the tip off to one side. -- atp "A motorcycle is a bicycle with a

Re: [Emc-users] How does this work?

On 05/19/2018 08:58 PM, Dan Bloomquist wrote: My son is looking at CNC mills. I cam across this one, and no, I don't think it suitable for him. He will really need a Haas class machine. But I'm looking at the photos and I don't see any 'glass', feedback, like my mill. How does it work? I

[Emc-users] How does this work?

This might be worth it, depending on what it goes for.. Roland On 20 May 2018 at 15:31, N. Christopher Perry wrote: > > > On May 20, 2018, at 7:44 AM, Ed

Re: [Emc-users] makeing tap hats, from brass rod

On Sunday 20 May 2018 10:17:27 andy pugh wrote: > On 20 May 2018 at 02:41, Gene Heskett wrote: > > Good idea but the drill bit doesn't seem to want to self center, > > Spotting drills work better than centre drills if you are not actually > making a centre hole for a lathe

Re: [Emc-users] makeing tap hats, from brass rod

On Sunday 20 May 2018 09:57:29 Erik Christiansen wrote: > On 19.05.18 21:41, Gene Heskett wrote: > > I have all these brass slugs fixed so they are keyed into a scallop > > in the edge of a 7/8" R8 collet that fits the head of a 4mm capscrew > > in the lower end of the slug. So the next operation

Re: [Emc-users] makeing tap hats, from brass rod

On 20 May 2018 at 02:41, Gene Heskett wrote: > Good idea but the drill bit doesn't seem to want to self center, Spotting drills work better than centre drills if you are not actually making a centre hole for a lathe to use. https://www.ebay.com/itm/131375282525 -- atp

Re: [Emc-users] makeing tap hats, from brass rod

On 19.05.18 21:41, Gene Heskett wrote: > I have all these brass slugs fixed so they are keyed into a scallop in > the edge of a 7/8" R8 collet that fits the head of a 4mm capscrew in the > lower end of the slug. So the next operation is to set it into the > spindle, and position it so the

Re: [Emc-users] How does this work?

> On May 20, 2018, at 7:44 AM, Ed wrote: > >> On 05/19/2018 08:58 PM, Dan Bloomquist wrote: >> >> My son is looking at CNC mills. I cam across this one, and no, I don't think >> it suitable for him. He will really need a Haas class machine. >> >> But I'm looking at the photos

Re: [Emc-users] How does this work?

On Sunday 20 May 2018 07:44:44 Ed wrote: > On 05/19/2018 08:58 PM, Dan Bloomquist wrote: > > My son is looking at CNC mills. I cam across this one, and no, I > > don't think it suitable for him. He will really need a Haas class > > machine. > > > > But I'm looking at the photos and I don't see

Re: [Emc-users] How does this work?

On 05/19/2018 08:58 PM, Dan Bloomquist wrote: My son is looking at CNC mills. I cam across this one, and no, I don't think it suitable for him. He will really need a Haas class machine. But I'm looking at the photos and I don't see any 'glass', feedback, like my mill. How does it work? I

[Emc-users] Very low backlash ballscrews [Was: Re: How does this work?

On 19.05.18 23:25, Chris Albertson wrote: > Ball screws have gotten cheap enough now that I'm putting one on a $500 > Harbor Freight mill. I paid abut $30 for a very good 16mm diameter by > 500mm long zero backlash ball screw and nut. Yes truly "zero" there seem > to be two ball nuts working in

Re: [Emc-users] eBay

On Sunday 20 May 2018 00:09:05 jeremy youngs wrote: > Gene, I was perusing eBay and found this, thought of you. > 323251704661 What I've already done basically, and too much $. I have a 1 hp treadmill motor, driving a 3" polygroove pulley on one end of a jackshaft for a 3/1 reduction, and the

Re: [Emc-users] How does this work?

Yes. Feedback from the motor shafts only. This is the #1 most common way to go.You might be thinking about a lot of backlash but they likely have ball screws not acme lead screws. Ball screws have gotten cheap enough now that I'm putting one on a $500 Harbor Freight mill. I paid abut $30