Re: [Emc-users] experimental bearings for harmonic drive

2021-03-29 Thread Gregg Eshelman via Emc-users
Use a ball cage that snaps in. I designed an example that uses 12 steel BBs. https://www.thingiverse.com/thing:1769802 Bearings are made with the parts sized so that when the inner race is shifted as far to one side as it can, the gap on the opposite side is just wide enough to insert the

Re: [Emc-users] Maybe a minimally printed harmonic drive?

2021-03-29 Thread Sam Sokolik
^ thanks andy. On Mon, Mar 29, 2021 at 10:23 PM Sam Sokolik wrote: > http://electronicsam.com/images/greenmachine/IMG_20210329_220745.jpg > > On Sun, Mar 28, 2021 at 5:17 PM Sam Sokolik wrote: > >> have not done any destructive testing - but finally grabbed an oem650 >> drive so I can have

Re: [Emc-users] Maybe a minimally printed harmonic drive?

2021-03-29 Thread Sam Sokolik
http://electronicsam.com/images/greenmachine/IMG_20210329_220745.jpg On Sun, Mar 28, 2021 at 5:17 PM Sam Sokolik wrote: > have not done any destructive testing - but finally grabbed an oem650 > drive so I can have full 4 axis to play with. Seems to run the rotary > atleast as good as the

Re: [Emc-users] Small PC for use with 7i90 / 7i96?

2021-03-29 Thread Gene Heskett
On Monday 29 March 2021 21:59:11 Jon Elson wrote: > On 03/29/2021 07:48 PM, Billy Huddleston wrote: > For really small, like a 7" cube, you can get mini ITX > motherboards and a matching cabinet and power supply from > the usual outfits like NewEgg, etc. The 7" cube box allows > full-height PCI

Re: [Emc-users] Small PC for use with 7i90 / 7i96?

2021-03-29 Thread Jon Elson
On 03/29/2021 07:48 PM, Billy Huddleston wrote: For really small, like a 7" cube, you can get mini ITX motherboards and a matching cabinet and power supply from the usual outfits like NewEgg, etc. The 7" cube box allows full-height PCI cards. If you can handle something a little bigger, you

Re: [Emc-users] Small PC for use with 7i90 / 7i96?

2021-03-29 Thread Billy Huddleston
The one from Amazon uses a M.2 SATA SSD..  Not a SD Card.. On 3/29/21 8:33 PM, Chris Albertson wrote: For about the same price you get a real-PC that is much faster that uses an SSD rather than a memory card for storage. It is still pretty small

Re: [Emc-users] Small PC for use with 7i90 / 7i96?

2021-03-29 Thread Chris Albertson
For about the same price you get a real-PC that is much faster that uses an SSD rather than a memory card for storage. It is still pretty small https://www.newegg.com/compaq-6200-student-home-office/p/1VK-001E-3WR47 On Mon, Mar 29, 2021 at 11:51 AM Billy Huddleston wrote: > Looking for a

Re: [Emc-users] Small PC for use with 7i90 / 7i96?

2021-03-29 Thread Gene Heskett
On Monday 29 March 2021 18:42:00 Billy Huddleston wrote: > Doesn't have to be the size of a Rpi4. One about the size I posted, or > a NUC is fine.  I'm even fine with something a bit larger.  I was just > wondering what was the nominal choice these days. Also, this is for a > friend, so, I don't

Re: [Emc-users] Small PC for use with 7i90 / 7i96?

2021-03-29 Thread Billy Huddleston
Doesn't have to be the size of a Rpi4. One about the size I posted, or a NUC is fine.  I'm even fine with something a bit larger.  I was just wondering what was the nominal choice these days. Also, this is for a friend, so, I don't want to muck around with a Rpi4 right now.  Need it as simple as

Re: [Emc-users] experimental bearings for harmonic drive

2021-03-29 Thread Gene Heskett
On Monday 29 March 2021 16:07:22 Frank Tkalcevic wrote: > > That is an enticing thought, but that will require and entrance > > notch in one side if the races > > This is an example of not having to put a filling notch in your > bearings - https://youtu.be/3-Jcp8vFAko?t=41 > > There are not

Re: [Emc-users] Small PC for use with 7i90 / 7i96?

2021-03-29 Thread Gene Heskett
On Monday 29 March 2021 14:30:19 Billy Huddleston wrote: > Looking for a small form factor PC to use.  Been a while since I've > put together a new system. > > Contemplating this: https://www.amazon.com/dp/B085RZDVL5  (Has WiFi > for LAN connection and onboard Ethernet for the MESA Card) > > Or

Re: [Emc-users] Small PC for use with 7i90 / 7i96?

2021-03-29 Thread andy pugh
On Mon, 29 Mar 2021 at 19:51, Billy Huddleston wrote: > Contemplating this: https://www.amazon.com/dp/B085RZDVL5 I have one of the previous model, it works perfectly adequately. In fact I bought it specifically to test the LinuxCNC installer on UEFI hadware, so I am pretty confident that

Re: [Emc-users] experimental bearings for harmonic drive

2021-03-29 Thread Gene Heskett
On Monday 29 March 2021 11:24:18 andy pugh wrote: > On Mon, 29 Mar 2021 at 01:26, Gene Heskett wrote: > > Thats not what I have, and DDG searching for PEI gets you about the > > first 500 hits for Prince Edward Island. :) > > Try eBay and "PEI Printing Surface" I didn't quite hit that but I

Re: [Emc-users] experimental bearings for harmonic drive

2021-03-29 Thread Frank Tkalcevic
> That is an enticing thought, but that will require and entrance notch in > one side if the races This is an example of not having to put a filling notch in your bearings - https://youtu.be/3-Jcp8vFAko?t=41 There are not enough balls to reach all the way around, so they can be easily loaded,

[Emc-users] Small PC for use with 7i90 / 7i96?

2021-03-29 Thread Billy Huddleston
Looking for a small form factor PC to use.  Been a while since I've put together a new system. Contemplating this: https://www.amazon.com/dp/B085RZDVL5  (Has WiFi for LAN connection and onboard Ethernet for the MESA Card) Or perhaps a Intel NUC?  Anyone have suggestions?  What's everyone

Re: [Emc-users] experimental bearings for harmonic drive

2021-03-29 Thread andy pugh
On Mon, 29 Mar 2021 at 01:26, Gene Heskett wrote: > Thats not what I have, and DDG searching for PEI gets you about the first > 500 hits for Prince Edward Island. :) Try eBay and "PEI Printing Surface" -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the

Re: [Emc-users] experimental bearings for harmonic drive

2021-03-29 Thread Gene Heskett
On Sunday 28 March 2021 22:51:17 Gene Heskett wrote: > On Sunday 28 March 2021 21:00:56 Chris Albertson wrote: > > Back to printing ball bearings. The best way is not to do it. Buy > > sealed bearing units and press them into a printed recess. But > > large diameter sealed bearings can be