Author Topic: Atlas Shaper Crossfeed (Read 13817 times)

Sackett · « **on:** August 30, 2015, 04:23:21 PM »

I cant get the power crossfeed working on my Atlas shaper. The gear "appears" to be a slip fit on the shaft,, no visible means of tightening it,,,no set screw, or pin.If I engage the power feed, the ratchet just rocks back n forth, as the gear turns on shaft. Feeds fine by hand with wrench on shaft.I've taken apart ,n put back together several times to no avail. Anybody with one of these machines got any ideas??? help needed please

vtsteam · « **Reply #1 on:** August 30, 2015, 08:13:47 PM »

Wish I could help. Mine is still in bits. Do you have a manual? Do a search online, if not.

Sackett · « **Reply #2 on:** August 30, 2015, 08:33:48 PM »

got manual,,,n shows how goes together,, but nothing on how to keep gear from turning on shaft

tomrux · « **Reply #3 on:** August 31, 2015, 03:01:58 AM »

Just had a quick look at my shaper, while it aint an Atlas it is a copy.
The cross feed cog is pinned to the shaft. looks like a taper pin.

Tom R

ieezitin · « **Reply #4 on:** August 31, 2015, 05:31:39 PM »

your Pawl maybe missing.

Here is a exploded drawing for you.

Anthony.

tom osselton · « **Reply #5 on:** September 01, 2015, 01:16:17 AM »

Have you tried adjusting it on the drive shaft it may be the setting is to small for the pawl to engage. I think we had the same problem when we first played with ours.

mexican jon · « **Reply #6 on:** September 03, 2015, 02:13:36 PM »

I had a similar problem on my AMMCO shaper

Confused the hell out of me for a while

Then i realised it was ok in one direction

basically there was enough spring tension set on the feed screw as the retaining collar had come loose once I adjusted that to put some resistance back then the ratchet worked fine

Sackett · « **Reply #7 on:** September 04, 2015, 09:03:57 PM »

tks for rep;ys, n suggestions. gear spins freely on feedscrew. pawl, work ok,, but just rocks back n forth,, as the gear slips on shaft. I dont think locktight will hold ,,thinking of trying to drill gear, n put in setscrew maybe

JHovel · « **Reply #8 on:** September 05, 2015, 09:03:25 AM »

There may be too much force transmitted for a setscrew to hold the ratchet gear to the shaft.
You should probably drill right through gear and shaft and fit a roll pin or if you have a taper reamer fit a taper pin.
Never seen any other method of fixing the feed gear to its shaft.
Cheers,
Joe
(Douglas shaper)

Manxmodder · « **Reply #9 on:** September 05, 2015, 09:37:26 AM »

Sackett,the Loctite retainer grade probably would fix the ratchet to the leadscrew satisfactorily but it would depend on the clearance not being too large.

I would try Loctite as a first option then the grub screw if that doesn't work.

Here is a reference photo of the grub screw on my Alba 1A shaper ratchet......OZ

(Attachment shrunk by AWEMawson as requested)

awemawson · « **Reply #10 on:** September 05, 2015, 10:23:08 AM »

I'm rather surprised that there is not a key and keyway in that position as there will be quite a jerk as it sets off on it's travels.

Manxmodder · « **Reply #11 on:** September 05, 2015, 11:00:46 AM »

There isn't a great deal of load on it,Andrew. It is only turning the leadscrew to traverse the table cross feed....OZ.

tom osselton · « **Reply #12 on:** September 05, 2015, 05:39:31 PM »

Have you downloaded this?
7B Atlas 7" Metal Working Shaper Operations Manual & Parts Repair List

http://vintagemachinery.org/pubs/detail.aspx?id=3563

Sackett · « **Reply #13 on:** September 06, 2015, 08:01:36 PM »

Yes, I have the manual,, although it is a rather poor reproduction. There is no indication of any kind of fixing to shaft,, just the gear, and a bushing in it

trapper · « **Reply #14 on:** September 07, 2015, 03:17:15 AM »

http://wentztech.com/WebDisk/Metalworking/Shaper/Atlas%20Manual%20S7B%20Parts%20List%20Catalog%207B.pdf Might be of some use to you are you sure theres not a taper pin in there,not the first person(myself included)to not be able to see the pin,these old machines can hide the so they are virtually invisible-get yourself a powerful magnifying glass and have a good look,sometimes they arnt visible without one-fitted and dressed by a good old fashioned fitter

trapper · « **Reply #15 on:** September 07, 2015, 03:19:53 AM »

https://groups.google.com/forum/#!topic/rec.crafts.metalworking/Rij_-1WT1M0 And another

Manxmodder · « **Reply #16 on:** September 07, 2015, 08:19:09 AM »

Quote from: awemawson on September 05, 2015, 10:23:08 AM

I'm rather surprised that there is not a key and keyway in that position as there will be quite a jerk as it sets off on it's travels.

Andrew,
Just a little update: further examination shows the leadscrew shaft has a conical detent drilled about 3.5mm deep and the grub screw is of the pointed type so it is effectively keyed onto the shaft.....OZ.

tom osselton · « **Reply #17 on:** September 07, 2015, 02:12:52 PM »

I'm wondering if it needs to be keyed because the shaft that moves the table is keyed so the ratchet can spin free on the shaft I'll have to take a look at mine.

Manxmodder · « **Reply #18 on:** September 07, 2015, 03:23:18 PM »

Tom,I would think the ratchet pawl carrier is the bit that is free to rock back and forth on the leadscrew shaft. The splined ratchet wheel itself has to be firmly affixed stationary to the leadscrew shaft or no advancement movement would be transmitted.

See my earlier photo of the Alba arrangement:
http://madmodder.net/index.php?action=dlattach;topic=10925.0;attach=25310;image

OZ.

Sackett · « **Reply #19 on:** September 07, 2015, 04:20:26 PM »

My ratchet wheel is on a stub shaft,n drives the gear on the crossfeed shaft

tom osselton · « **Reply #20 on:** September 07, 2015, 04:22:15 PM »

My thoughts are the shaft moving the table are fixed and the gear for the pawl freewheels but being engaged with the gear on the shaft is held stationary until the pawl rocks and engages a tooth. This is why I said to increase the throw on the drive plate by sliding it outwards from the center. One way to check would be to disconect the drive link and move the unit by hand to see if the pawls work pointing to adjustment.

Manxmodder · « **Reply #21 on:** September 07, 2015, 05:34:05 PM »

The Atlas system sounds like it must be a completely different arrangement to the Alba. Any chance of someone putting up a photo or 2 just to give a better idea of what it looks like?.....OZ.

rockknocker · « **Reply #22 on:** September 07, 2015, 11:34:37 PM »

This is what my Atlas 7b shaper feed mechanism looks like. Is yours similar?

I'm not following exactly which part you're talking about. Mine doesn't have any exposed gears in the power feed...

tom osselton · « **Reply #23 on:** September 08, 2015, 05:45:14 AM »

Here is the side of mine showing the linkage and the adjustment on the right, sliding the position outward increases the feed rate but if it is too close to the center it will just rock and the pawl will not engage.

And one of the crossfeed.

After removing the linkage and center bolt it comes out easy I did not have to remove the feed wheel.

One thing I found interesting is how they machined the gear down on one side so the pawl fits. The gear itself has a bushing and no setscrews or keys it just freewheels being engaged with the crossfeed gear.

Hope this helps.

Sackett · « **Reply #24 on:** September 08, 2015, 08:08:48 AM »

Guys, thanks so much for posting pics,, I havent figured that out yet.Rock, the offending part is in that small case just behind the graduated collar on the feedshaft.The pic that Tom shows of the pawl gear,,,,that gear drives a smaller gear on the crossfeed shaft. The smaller gear is the one causing me problems. Everything else works fine,,ratchet, ratchet gear ,left to right lever , ect

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Author Topic: Atlas Shaper Crossfeed (Read 13817 times)