What I envision, after watching 'The Little Hobber' on youtube about 100 times.
Doing hobbing with a mechanical connection between the Hobbing arbor and the
work arbor is painful, all those gears, can guarantee that I won't have the set
I need. I found on Ebay, tool suppliers, in China, selling DP20 or Module 1.25
hobs for about US$50. Using what I can see in the little hobber, I need to
accurately twist the hob axis, and then synchronize, the hob to the work, and
feed the hob once every revolution of the work. For adjusting the twist, I was
figuring on accurately placing two drill bushings that would hold two dowel
pins against which I would place my sine bar, and just use a set of gage blocks
to get the angle right.
For powering this thing, I am considering some of Jon's servo motors, running
in the 1500 to 2000 rpm range, with appropriate gear reduction to the hob and
the work spindles. If I can use the encoder A channel or B channel as the
locking frequency from the hob spindle, coming up with a divider for the work
spindle should not be hard.
Basic construction would entail use of 5200 series double row ball bearings for
the spindles, and those very nice, and oh so cheap ER collet spindles.
- Original Message -
From: emc-users-requ...@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Sent: Thursday, July 30, 2015 4:03:38 AM
Subject: Emc-users Digest, Vol 111, Issue 59
Send Emc-users mailing list submissions to
emc-users@lists.sourceforge.net
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.sourceforge.net/lists/listinfo/emc-users
or, via email, send a message with subject or body 'help' to
emc-users-requ...@lists.sourceforge.net
You can reach the person managing the list at
emc-users-ow...@lists.sourceforge.net
When replying, please edit your Subject line so it is more specific
than Re: Contents of Emc-users digest...
Today's Topics:
1. Re: Gear hobbing machine (Karlsson Wang)
2. Re: Switches for home, limits (andy pugh)
3. Re: Before i go bonkers: M98, M99 (Mark Wendt)
4. Re: Before i go bonkers: M98, M99 (Mark Wendt)
5. Re: Before i go bonkers: M98, M99 (Mark Wendt)
6. Re: Switches for home, limits (Gene Heskett)
7. Re: Switches for home, limits (John Alexander Stewart)
--
Message: 1
Date: Thu, 30 Jul 2015 11:19:14 +0200
From: Karlsson Wang nicklas.karls...@karlssonwang.se
Subject: Re: [Emc-users] Gear hobbing machine
To: Enhanced Machine Controller \(EMC\)
emc-users@lists.sourceforge.net
Message-ID: 20150730111914.7a74bc00db4f83fd3429a...@karlssonwang.se
Content-Type: text/plain; charset=US-ASCII
Sounds great. I bough a few hundred kilos of material probably intented for
gears from bankcrupt company which i intend to use for testing machine.
Nicklas Karlsson
On Thu, 30 Jul 2015 10:09:51 +0100
andy pugh bodge...@gmail.com wrote:
On 30 July 2015 at 07:16, Dave Caroline dave.thearchiv...@gmail.com wrote:
Andy has implemented it on a mill
http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Hobbing
I have now created a dedicated hobbing GladeVCP panel which performs
basic gear calculations (including span across teeth for size
checking) as well as running the hobbing process.
I will try to remember to add it to the Wiki page.
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
--
Message: 2
Date: Thu, 30 Jul 2015 10:30:21 +0100
From: andy pugh bodge...@gmail.com
Subject: Re: [Emc-users] Switches for home, limits
To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
Message-ID:
can1+yzvwuwhqkscll7ou9od-mithruhwsflbzxuwq3wansw...@mail.gmail.com
Content-Type: text/plain; charset=UTF-8
On 30 July 2015 at 08:02, Marcus Bowman
marcus.bow...@visible.eclipse.co.uk wrote:
it would be useful if folks could put the pictures somewhere we could all see
them.
I have been tending to embed inductive proxes in the machine somewhere
with a drilled hole as the target.
https://picasaweb.google.com/108164504656404380542/HarrisonMill#5989135693933177186
The Y-axis prox is embedded in the gib block, and uses a drilled hole target.
The Z-axis is actually also on the gib block and the target is a metal
block screwed to the main column casting.
The X (not visible) is in a bolted-on block under the edge of the
saddle with another drilled hole in the underdide of the table slide
as the target.
They can all get wet but X and Y are completely protected from swarf
and the Z is out of the way of swarf.
I bought 5 of the 8mm proximity sensors from eBay for less than ?15.
You want the
