Re: [Emc-users] Fwd: Way OT: Heater Wire

2017-07-31 Thread Kirk Wallace
On 07/31/2017 02:59 PM, Chris Albertson wrote: Someone here might know where to get the thin heater wire (insulated nichrome?) to rebuild the linked gauge CVR? Locally, try "smoke shops" People into e-cirgaretts use this wire. It comes in different gauges.Amazon sells the same wire

Re: [Emc-users] Fwd: Way OT: Heater Wire

2017-07-31 Thread Todd Zuercher
My dad had a Scout II when I was a kid. I thought it was pretty cool back then. I've heard most of their rust problems stemmed from the insides of the body panels not even being painted. Very durable trucks otherwise. I also heard a story, an IH line worker said to a co-worker as he

Re: [Emc-users] Fwd: Way OT: Heater Wire

2017-07-31 Thread Kirk Wallace
On 07/31/2017 04:04 PM, Dave Cole wrote: That Scout probably has that half a V8 engine.. its a slant 4 engine with about 200 cu inches? I believe that was made not too far from my house in Fort Wayne, IN. I almost bought one of those back in the late 70's. They rusted like crazy in the midwest.

Re: [Emc-users] Fwd: Way OT: Heater Wire

2017-07-31 Thread Dave Cole
That Scout probably has that half a V8 engine.. its a slant 4 engine with about 200 cu inches? I believe that was made not too far from my house in Fort Wayne, IN. I almost bought one of those back in the late 70's. They rusted like crazy in the midwest. Rust prevention was an after thought

Re: [Emc-users] Fwd: Way OT: Heater Wire

2017-07-31 Thread Chris Albertson
Someone here might know where to get the thin heater wire (insulated > nichrome?) to rebuild the linked gauge CVR? > Locally, try "smoke shops" People into e-cirgaretts use this wire. It comes in different gauges.Amazon sells the same wire for the same use Here is one

Re: [Emc-users] Fwd: Way OT: Heater Wire

2017-07-31 Thread Kirk Wallace
On 07/31/2017 02:00 PM, andy pugh wrote: On 31 July 2017 at 21:47, Kirk Wallace wrote: Someone here might know where to get the thin heater wire (insulated nichrome?) to rebuild the linked gauge CVR? How hot does it get? Could you wrap the part in Kapton tape

Re: [Emc-users] Fwd: Way OT: Heater Wire

2017-07-31 Thread andy pugh
On 31 July 2017 at 21:47, Kirk Wallace wrote: > Someone here might know where to get the thin heater wire (insulated > nichrome?) to rebuild the linked gauge CVR? How hot does it get? Could you wrap the part in Kapton tape and use uninsulated wire? -- atp "A

[Emc-users] Fwd: Way OT: Heater Wire

2017-07-31 Thread Kirk Wallace
Forwarded Message Subject: Way OT: Heater Wire Date: Mon, 31 Jul 2017 13:36:59 -0700 From: Kirk Wallace To: Enhanced Machine Controller (EMC) Someone here might know where to get the thin heater wire (insulated

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread Gregg Eshelman via Emc-users
Look up the Dollo 3D printer. All the files are free to download. It includes pieces of herringbone rack and matching gears. Could have some examples printed then make molds and cast in high strength resin. Could also use the 3D files to 3D mill steel racks and gears. -- Original Message

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread Les Newell
If they are pre-loading to full contact, I fail to see the diff between a spring load and a pre-load. With a spring, it might have enough give to ride over a wood chip falling on the pinion. The problem is that racks produce a significant force pushing the pinion out of mesh. If I remember

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread andy pugh
On 31 July 2017 at 18:12, Gene Heskett wrote: >> http://nexengroup.com/nxn/products/prod-nav/lp/Roller+Pinion+System > > That I like. It reminds me uncomfortably of:

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread Gene Heskett
On Monday 31 July 2017 08:02:54 Reggie Crane wrote: > Have you considered Nexen linear positioning systems? > > http://nexengroup.com/nxn/products/prod-nav/lp/Roller+Pinion+System That I like. And I'd not be surprised to find that the racks can be butted together to get the effective lengths

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread Gene Heskett
On Monday 31 July 2017 07:13:05 Tomaz T. wrote: > For my future project (cnc router) I will have to use helical rack and > pinion system on two longer axis (2 and 3.5m). There are some designs > where pinion is forced against rack with spring tensioner, on the > other side, if I follow Atlanta's

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread Bari 00000
http://www.machinedesign.com/linear-motion/go-long-pros-and-cons-rack-and-pinion-systems Another option are master and slave pinion drives: https://servotak.eu/products/custom-products/zero-backlash-rack-pinion-gearbox-systems On Mon, Jul 31, 2017 at 6:13 AM, Tomaz T.

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread Les Newell
Tensioning the gear against the rack works reasonably well for plasma cutters as they are lightly loaded. One problem is that gears generate a force that is trying to push them apart. If I remember correctly the generated force is about a third of the linear thrust. You end up having to use a

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread andy pugh
On 31 July 2017 at 13:42, Tomaz T. wrote: > Something like this would reduce backlash to "zero" (without gearbox): > https://www.damencnc.com/products/mechanical-components/rack-pinion/r-p-drive-antibacklash-diy-includes-gears15t/_404_w_74_554_GB_1 Or

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread Tomaz T .
Something like this would reduce backlash to "zero" (without gearbox): https://www.damencnc.com/products/mechanical-components/rack-pinion/r-p-drive-antibacklash-diy-includes-gears15t/_404_w_74_554_GB_1 >It ocurred to me a while ago that if using a double-helical rack and >pinion then you

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread andy pugh
On 31 July 2017 at 13:02, Reggie Crane wrote: > Have you considered Nexen linear positioning systems? > > http://nexengroup.com/nxn/products/prod-nav/lp/Roller+Pinion+System I rather like the Servobelt idea. It should be much stiffer than a conventional belt, for

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread Reggie Crane
Have you considered Nexen linear positioning systems? http://nexengroup.com/nxn/products/prod-nav/lp/Roller+Pinion+System On Mon, Jul 31, 2017 at 6:53 AM, andy pugh wrote: > On 31 July 2017 at 12:13, Tomaz T. wrote: > > For my future project (cnc

Re: [Emc-users] Rack and pinion - tension or not

2017-07-31 Thread andy pugh
On 31 July 2017 at 12:13, Tomaz T. wrote: > For my future project (cnc router) I will have to use helical rack and pinion > system on two longer axis (2 and 3.5m). There are some designs where pinion > is forced against rack with spring tensioner It ocurred to me a while

[Emc-users] Rack and pinion - tension or not

2017-07-31 Thread Tomaz T .
For my future project (cnc router) I will have to use helical rack and pinion system on two longer axis (2 and 3.5m). There are some designs where pinion is forced against rack with spring tensioner, on the other side, if I follow Atlanta's installation manual for their system, they forbid