Re: [Emc-users] Yet another topic about gantry homing

2018-10-06 Thread Leonardo Marsaglia
A lot of discussion! I love this list haha. Well, I will try to answer this and focus on the main subjects we've been covering. As you pointed out Les, an hydraulic rod is what I'm planning to use. Hard chromed and also lubed to avoid premature wear. I plan to add some sort of plate to collect

[Emc-users] Have You Seen This Absolute Position Sensor?

2018-10-06 Thread Kenneth Lerman
Kenneth Lerman Thu, Oct 4, 7:54 PM (2 days ago) to Emc-users ...for less than three dollars... I don't know what I might use it for, but it seems pretty neat. Ken Kenneth Lerman 55 Main Street Newtown, CT 06470

Re: [Emc-users] Yet another topic about gantry homing

2018-10-06 Thread Les Newell
No, I plan to support 50 mm bars every 600 mm more or less. I'm attaching some pictures of the design I'm working on If you really want to go with this I would second Chris' suggestion of using HDPE or UHMW. You are still gonna wear those shafts out pretty quick unless you use chromed shafts.

Re: [Emc-users] Yet another topic about gantry homing

2018-10-06 Thread andy pugh
On Sat, 6 Oct 2018 at 15:02, Leonardo Marsaglia wrote: > As you pointed out Les, an hydraulic rod is what I'm planning to use. Hard > chromed and also lubed to avoid premature wear. Maybe motorcycle fork bushes (PTFE typically, on a metal backing) would make good bearings. -- atp "A

Re: [Emc-users] Yet another topic about gantry homing

2018-10-06 Thread Jon Elson
On 10/05/2018 11:17 PM, Roland Jollivet wrote: Of course you can remove the nut. You just roll it onto a correctly sized former. In fact it's a good idea to do this with the linear slides and ballscrews from china, to give them a wash. While they are greased up and wrapped in plastic, they are

Re: [Emc-users] Yet another topic about gantry homing

2018-10-06 Thread Gene Heskett
On Saturday 06 October 2018 08:46:35 Les Newell wrote: > > No, I plan to support 50 mm bars every 600 mm more or less. I'm > > attaching some pictures of the design I'm working on > > If you really want to go with this I would second Chris' suggestion of > using HDPE or UHMW. You are still gonna

[Emc-users] Vacuum table Re: Yet another topic about gantry homing

2018-10-06 Thread Gregg Eshelman via Emc-users
You could make the vacuum table with several zones, connected with a PVC pipe manifold and ball valves to close off sections you're not using. That would be easier than keeping stuff around to lay over unused sections of the table. ___ Emc-users

Re: [Emc-users] Have You Seen This Absolute Position Sensor?

2018-10-06 Thread Jon Elson
On 10/06/2018 08:31 AM, Kenneth Lerman wrote: Kenneth Lerman Thu, Oct 4, 7:54 PM (2 days ago) to Emc-users ...for less than three dollars... I don't know what I might use it for, but it seems pretty neat. Hmmm, very interesting

Re: [Emc-users] Making minor progress on the laser setup

2018-10-06 Thread Gene Heskett
On Thursday 04 October 2018 21:59:50 Gene Heskett wrote: > Greetings all; > > This afternoon I unpacked some brass tubing, the same size as what the > 38 special laser was made from, and stumbled over a short piece of 3/8 > SS tubing a neighbor had given me after he had redone the fuel lines > in

Re: [Emc-users] Have You Seen This Absolute Position Sensor?

2018-10-06 Thread Chris Albertson
Yes I've seen something like this and i have a few examples. But mine has been made into a finished product, mounted in the threaded housing and sealed up with plastic and a cable with a connector on it. They work well and are reliable. They are repeatable if the 0.001 inch level. I bought mine