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From: "andy pugh" <bodge...@gmail.com>
To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
Sent: 7/31/2017 5:53:04 AM
Subject: Re: [Emc-users] Rack and pinion - tension or not
On 31 July 2017 at 12:13, Tomaz T. <tomaz_...@hotmai
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
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:
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
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
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.
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
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
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
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
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
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
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
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