Thanks Mert that's what I thought turns out I got a bad chuck with my micromark 7x16 I had a harbor freight lathe 7 x 10 that I still have tried it on both the micromark runs out .007 the harbor freight .003 which is good for a chuck right?
Bill |
|
There are several things that may help to minimize runout of a 3 jaw self-centering chuck.
See:
< >
for some things to check.
John
toggle quoted message
Show quoted text
--- In 7x12minilathe@..., "Bill" <bemac502000@...> wrote:
Hi another newbie question what is the procedure of reloading the jaws in a three jaw chuck so that they run out as best as they could?
|
Re: Why doesn't my threading dial move?
Look for that dial to stop turning when you engage the half nuts, and start
turning again when you disengage 'em. That is how it is designed to work,
on purpose. Honest.
Mert
toggle quoted message
Show quoted text
-----Original Message-----
From: 7x12minilathe@...
[mailto:7x12minilathe@...]On Behalf Of bob_guenthner
Sent: Saturday, February 16, 2013 3:29 PM
To: 7x12minilathe@...
Subject: [7x12minilathe] Why doesn't my threading dial move?
Play with my new to me 8x12 today. When I engage the half nut the saddle
moves, but the dial doesn't turn. When I disengage the half nut the dial
turns. Haven't had time to really look at it, hopefully Monday. Hints at
what I should look for?
Thanks,
Bob
------------------------------------
Yahoo! Groups Links
|
Examine the jaws closely. Notice that the projections that engage the
spiral on the backplate are at different spacings from the inside edge of
the jaws. The one with the "tooth" closest is the #1 jaw. Push it into
it's slot, and holding it firmly inward, turn the backplate in the
directions that loosens the chuck. Under pressure, you will feel the #1
jaw suddenly "drop" into place. Stop. Put the jaw (the #2) with the tooth
next closest to the end into the next slot, and turn the backplate, but now
in the reverse direction, the one that closes the jaws. That will pick up
the #2, and in the last slot, the #3. Play with this a few times, and you
will be forever an expert at getting the thing back together right every
time.
Mert
toggle quoted message
Show quoted text
-----Original Message-----
From: 7x12minilathe@...
[mailto:7x12minilathe@...]On Behalf Of Bill
Sent: Saturday, February 16, 2013 2:55 PM
To: 7x12minilathe@...
Subject: [7x12minilathe] (unknown)
Hi another newbie question what is the procedure of reloading the jaws in a
three jaw chuck so that they run out as best as they could?
------------------------------------
Yahoo! Groups Links
|
Re: Why doesn't my threading dial move?
It's not "designed" to move once you have engaged the half nut(s) at the right "mark".? Perhaps so you can verify that you are accurately on the correct mark?
From: bob_guenthner
To: 7x12minilathe@...
Sent: Saturday, 16 February 2013, 20:28
Subject: [7x12minilathe] Why doesn't my threading dial move?
?
Play with my new to me 8x12 today. When I engage the half nut the saddle moves, but the dial doesn't turn. When I disengage the half nut the dial turns. Haven't had time to really look at it, hopefully Monday. Hints at what I should look for?
Thanks,
Bob
|
Re: Why doesn't my threading dial move?
Nothing. It's working as designed. The carriage is moving with the lead screw so the dial shouldn't be moving. Vince. On Sat, 16 Feb 2013, bob_guenthner wrote: Play with my new to me 8x12 today. When I engage the half nut the saddle moves, but the dial doesn't turn. When I disengage the half nut the dial turns. Haven't had time to really look at it, hopefully Monday. Hints at what I should look for?
Thanks,
Bob
------------------------------------
Yahoo! Groups Links
Vince. -- Michigan VHF Corp. The Foggy Mist Emporium
|
Why doesn't my threading dial move?
Play with my new to me 8x12 today. When I engage the half nut the saddle moves, but the dial doesn't turn. When I disengage the half nut the dial turns. Haven't had time to really look at it, hopefully Monday. Hints at what I should look for?
Thanks,
Bob
|
Hi another newbie question what is the procedure of reloading the jaws in a three jaw chuck so that they run out as best as they could?
|
Re: Digital linear scale for 7x lathe?
Ryan The DRO on the lathe shown in the pix came from Grizzly. ?The metal pieces were what I could find in the local Ace Hdwre, Home Depot and Lowes plus a few bits from my scrap box. ? Art
On Fri, Feb 15, 2013 at 11:57 PM, Ryan Hodges <ifly172@...> wrote:
?
That's nice Art.
Where did you get the parts?? A DRO is on my list of "wants".
Thanks!
Ryan
-----Original Message-----
From: art9999@... < art@...>
To: 7x12minilathe < 7x12minilathe@...>
Sent: Fri, Feb 15, 2013 11:51 pm
Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe?
?
Dick
I have added a remote reading digital scale to two 7 x 10 lathes by placing the scale behind the lathe and below the ways. I have found that this keeps it out of the region of operating controls and doesn't restrict any of the precious 10-inch motion that I have. Also it is easy from that location to protect it from most of the swarf. Photos of one of these installations can be seen on my Photobucket site. The link is
Art
--- In 7x12minilathe@..., "Dick" wrote:
>
> I am strongly considering a Z axis digital linear scale for my 7 x 16 lathe.
> I am thinking I might want to mount it onto the rear side of the bed below the saddle gibs. The scale would have a remote reader that I could place anywhere within 48".
> Has anyone done this? I like to get as much info and learn of any experiences others may have had when doing this mod.
> Thanks
> Dick
>
|
Re: Slightly off topic - Vibratory Media Tumbler
SlickDeals is a website devoted to finding all sorts of deals on everything imaginable.<br><br>They have an ongoing thread dealing with HF coupons. If you can't find what you need in the Wiki on page 1, post to the thread and someone will find you a coupon quickly.<br><br><a href=">Sli\ ckDeals HF Coupon Thread</a> <br>
|
Re: Digital linear scale for 7x lathe?
John,
The readers stay on the scales. The bed scale has a clamp on the CS that grips the end of the scale while the reader is bolted to a bracket with a cam lock that grips the bed. Flip the cam lock, loosen a socket head screw 1/2 turn and the scale can be removed.
The scales are supported at only two points, avoiding the issue of getting three supports in a straight line. Only the bracket at the rear of the CS remains in place, the brackets attached to the readers remain attached to the readers. Quick and easy to install or remove.
See: < >
The taper attachment is peculiar in that it got used quite a bit initially, making the tooling for my mill's MT3 spindle plus I made some MT2 items for the lathe tailstock. Now, it gets used VERY infrequently, mostly by friends who are tooling up and need a taper for something special. It's been a couple years since I've made a taper for my own use.
John
toggle quoted message
Show quoted text
--- In 7x12minilathe@..., John Lindo <bechetboat@...> wrote:
John
Novel approach,nicely done.
When the DRO's are not in use,do you just slide the readers off the scales, and or scales and readers?
which IMO would be more beneficial,less chance of damage or missing brass shim.
PS I like your taper turning attachment.
Thanks
John L
Spain.
________________________________
From: GadgetBuilder <John@...>
To: 7x12minilathe@...
Sent: Saturday, February 16, 2013 3:19 PM
Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe?
??
I took a little different approach to DRO's as seen here:
< >
One advantage of a DRO over a DI is maximum travel capability. DI's with travel greater than 2" are not common whereas DRO's could read the complete bed length of a 7x12 if that is needed.
Another feature of a DRO is the ability to set zero with the push of a button - it often takes a bit of fiddling to zero a DI at the desired position.
My setup allows easily removing the DRO's when they're not needed (similar to using a DI). It turns out that since I built the retracting tool holder for threading I haven't used the CS DRO; the dials are all that's needed. My main use was the zero set to remember where I was when retracting and restoring for threading.
The bed length DRO gets installed and removed as needed, which is infrequent but when needed it's a real help. Since I only use it a couple times a month I remove the battery between uses - it runs down in a few weeks if you don't do this.
DI's and DRO's generally provide similar capabilities, so you pays your money and takes your chances. A point in favor of DI's is they don't need batteries ;-)
John
--- In 7x12minilathe@..., John Lindo wrote:
Hello Art.
Can you explain why it is necessary to put a digital scale on the bed.z axis.
I use a D I clamped to the bed,registering of the saddle.I could possibly see a use if you were machining a group of shoulders on a long
bar some distance away from the chuck.
I can understand the DRO's on the cross and compound if you do not trust the dials.
But those that bolt onto the ends of the handles only measure rotation of the scale and not slide movement,
and also can get in the way of travel if the compound is at an angle.
regards
John L
Spain.
________________________________
From: "art9999@"
To: 7x12minilathe@...
Sent: Friday, February 15, 2013 3:57 AM
Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe?
????
Dick,
I have done this on both of my 7 x 10 lathes. It works very well and is relatively easy to shield the scale from swarf.
Art
--- In 7x12minilathe@..., "Dick" wrote:
I am strongly considering a Z axis digital linear scale for my 7 x 16 lathe.
I am thinking I might want to mount it onto the rear side of the bed below the saddle gibs. The scale would have a remote reader that I could place anywhere within 48".
Has anyone done this? I like to get as much info and learn of any experiences others may have had when doing this mod.
Thanks
Dick
|
Re: Digital linear scale for 7x lathe? [2 Attachments]
Ryan, I think you may be looking at Art's earlier message, where the pics were attachments. The group doesn't accept those, so a few hours ago he repeated the post, but giving a link to Photobucket.
Andy
In 7x12minilathe@..., Ryan Hodges <ifly172@...> wrote:
toggle quoted message
Show quoted text
Is it just me? I can't see the pictures.
A DRO on the bed is on my want list. :-)
-----Original Message-----
From: art@...
To: 7x12minilathe <7x12minilathe@...>
Sent: Fri, Feb 15, 2013 4:39 am
Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe? [2 Attachments]
[Attachment(s) from Art included below]
DickI have added a remote reading digital scale to two 7 x 10 lathes by placing the scale behind the lathe and below the ways. I have found that this keeps it out of the region of operating controls and doesn't restrict any of the precious 10-inch motion that I have. Also it is easy from that location to protect it from most of the swarf. Attached are photos of the one of these installations.
Art
#AOLMsgPart_1_b2409758-b459-401d-9cbd-9318823b914a td{color: black;}
|
Re: Digital linear scale for 7x lathe? [2 Attachments]
Is it just me? I can't see the pictures.
A DRO on the bed is on my want list. :-)
toggle quoted message
Show quoted text
-----Original Message----- From: art@... To: 7x12minilathe <7x12minilathe@...> Sent: Fri, Feb 15, 2013 4:39 am Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe? [2 Attachments]
?
[Attachment(s) from Art included below]
Dick I have added a remote reading digital scale to two 7 x 10 lathes by placing the scale behind the lathe and below the ways. ?I have found that this keeps it out of the ?region of operating controls and doesn't restrict any of the precious 10-inch motion that I have. ?Also it is easy from that location to protect it from most of the swarf. ?Attached are photos of the one of these installations.
Art
|
Re: Digital linear scale for 7x lathe?
John Novel approach,nicely done. When the DRO's are not in use,do you just slide the readers off the scales, and or scales and readers? which IMO would be more beneficial,less chance of damage or missing brass shim. PS I like your taper turning attachment. Thanks John L Spain.
From: GadgetBuilder
To: 7x12minilathe@...
Sent: Saturday, February 16, 2013 3:19 PM
Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe?
?
I took a little different approach to DRO's as seen here:
< >
One advantage of a DRO over a DI is maximum travel capability. DI's with travel greater than 2" are not common whereas DRO's could read the complete bed length of a 7x12 if that is needed.
Another feature of a DRO is the ability to set zero with the push of a button - it often takes a bit of fiddling to zero a DI at the desired position.
My setup allows easily removing the DRO's when they're not needed (similar to using a DI). It turns out that since I built the retracting tool holder for threading I haven't used the CS DRO; the dials are all that's needed. My main use was the zero set to remember where I was when retracting and restoring for threading.
The bed length DRO gets installed and removed as needed, which is infrequent but when needed it's a real help. Since I only use it a couple times a month I remove the battery between uses - it runs down in a few weeks if you don't do this.
DI's and DRO's generally provide similar capabilities, so you pays your money and takes your chances. A point in favor of DI's is they don't need batteries ;-)
John
--- In 7x12minilathe@..., John Lindo wrote:
>
> Hello Art.
> Can you explain why it is necessary to put a digital scale on the bed.z axis.
> I use a D I clamped to the bed,registering of the saddle.I could possibly see a use if you were machining a group of shoulders on a long
> bar some distance away from the chuck.
> I can understand the DRO's on the cross and compound if you do not trust the dials.
> But those that bolt onto the ends of the handles only measure rotation of the scale and not slide movement,
> and also can get in the way of travel if the compound is at an angle.
> regards
> John L
> Spain.
>
>
>
>
> >________________________________
> > From: "art9999@..."
> >To: 7x12minilathe@...
> >Sent: Friday, February 15, 2013 3:57 AM
> >Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe?
> >
> >
> >??
> >
> >
> >Dick,
> >I have done this on both of my 7 x 10 lathes. It works very well and is relatively easy to shield the scale from swarf.
> >Art
> >
> >--- In 7x12minilathe@..., "Dick" wrote:
> >>
> >> I am strongly considering a Z axis digital linear scale for my 7 x 16 lathe.
> >> I am thinking I might want to mount it onto the rear side of the bed below the saddle gibs. The scale would have a remote reader that I could place anywhere within 48".
> >> Has anyone done this? I like to get as much info and learn of any experiences others may have had when doing this mod.
> >> Thanks
> >> Dick
> >>
> >
> >
> >
> >
> >
>
|
Re: Digital linear scale for 7x lathe?
I have scales on mine - makes life a lot easier.
As a test, after fab'ing and installing the 17 parts and scales, I took a piece of 7/8 cold rolled rod, turned it down to .5" at 1" using just the scales.
Pretty dang close. Having the hand crank for the split lead screw helps...
Art wrote:
toggle quoted message
Show quoted text
John
Necessary?- not for many but very nice for me.
I have removed my compound and use an AXA QCTP mounted on the cross-slide.
For z-axis motion, I use a handwheel directly connect to the leadscrew for
manual operations.
Also convenience!
Plus, on a 7 x 10 mounting anything like a magnetically coupled DI becomes
a use of the space which for me is in short supply.
Art
On Sat, Feb 16, 2013 at 3:54 AM, John Lindo <bechetboat@...> wrote:
**
Hello Art.
Can you explain why it is necessary to put a digital scale on the bed.z
axis.
I use a D I clamped to the bed,registering of the saddle.I could possibly
see a use if you were machining a group of shoulders on a long
bar some distance away from the chuck.
I can understand the DRO's on the cross and compound if you do not trust
the dials.
But those that bolt onto the ends of the handles only measure rotation of
the scale and not slide movement,
and also can get in the way of travel if the compound is at an angle.
regards
John L
Spain.
------------------------------
*From:* "art9999@..." <art@...>
*To:* 7x12minilathe@...
*Sent:* Friday, February 15, 2013 3:57 AM
*Subject:* [7x12minilathe] Re: Digital linear scale for 7x lathe?
Dick,
I have done this on both of my 7 x 10 lathes. It works very well and is
relatively easy to shield the scale from swarf.
Art
--- In 7x12minilathe@..., "Dick" wrote:
I am strongly considering a Z axis digital linear scale for my 7 x 16
lathe.
I am thinking I might want to mount it onto the rear side of the bed
below the saddle gibs. The scale would have a remote reader that I could
place anywhere within 48".
Has anyone done this? I like to get as much info and learn of any
experiences others may have had when doing this mod.
Thanks
Dick
|
Re: Digital linear scale for 7x lathe?
John Necessary?- not for many but very nice for me.
I have removed my compound and use an AXA QCTP mounted on the cross-slide. ?For z-axis motion, I use a handwheel directly connect to the leadscrew for manual operations.
Also convenience!?
Plus, on a 7 x 10 mounting anything like a magnetically coupled DI becomes a use of the space which for me is in short supply.
Art
On Sat, Feb 16, 2013 at 3:54 AM, John Lindo <bechetboat@...> wrote:
?
Hello Art.
Can you explain why it is necessary to put a digital scale on the bed.z axis.
I use a D I clamped to the bed,registering of the saddle.I could possibly see a use if you were machining a group of shoulders on a long
bar some distance away from the chuck. I can understand the DRO's on the cross and compound if you do not trust the dials.
But those that bolt onto the ends of the handles only measure rotation of the scale and not slide movement,
and also can get in the way of travel if the compound is at an angle.
regards
John L Spain.
?
Dick,
I have done this on both of my 7 x 10 lathes. It works very well and is relatively easy to shield the scale from swarf.
Art
--- In 7x12minilathe@..., "Dick" wrote:
>
> I am strongly considering a Z axis digital linear scale for my 7 x 16 lathe.
> I am thinking I might want to mount it onto the rear side of the bed below the saddle gibs. The scale would have a remote reader that I could place anywhere within 48".
> Has anyone done this? I like to get as much info and learn of any experiences others may have had when doing this mod.
> Thanks
> Dick
>
|
Re: Digital linear scale for 7x lathe?
I took a little different approach to DRO's as seen here:
< >
One advantage of a DRO over a DI is maximum travel capability. DI's with travel greater than 2" are not common whereas DRO's could read the complete bed length of a 7x12 if that is needed.
Another feature of a DRO is the ability to set zero with the push of a button - it often takes a bit of fiddling to zero a DI at the desired position.
My setup allows easily removing the DRO's when they're not needed (similar to using a DI). It turns out that since I built the retracting tool holder for threading I haven't used the CS DRO; the dials are all that's needed. My main use was the zero set to remember where I was when retracting and restoring for threading.
The bed length DRO gets installed and removed as needed, which is infrequent but when needed it's a real help. Since I only use it a couple times a month I remove the battery between uses - it runs down in a few weeks if you don't do this.
DI's and DRO's generally provide similar capabilities, so you pays your money and takes your chances. A point in favor of DI's is they don't need batteries ;-)
John
toggle quoted message
Show quoted text
--- In 7x12minilathe@..., John Lindo <bechetboat@...> wrote:
Hello Art.
Can you explain why it is necessary to put a digital scale on the bed.z axis.
I use a D I clamped to the bed,registering of the saddle.I could possibly see a use if you were machining a group of shoulders on a long
bar some distance away from the chuck.
I can understand the DRO's on the cross and compound if you do not trust the dials.
But those that bolt onto the ends of the handles only measure rotation of the scale and not slide movement,
and also can get in the way of travel if the compound is at an angle.
regards
John L
Spain.
________________________________
From: "art9999@..." <art@...>
To: 7x12minilathe@...
Sent: Friday, February 15, 2013 3:57 AM
Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe?
??
Dick,
I have done this on both of my 7 x 10 lathes. It works very well and is relatively easy to shield the scale from swarf.
Art
--- In 7x12minilathe@..., "Dick" wrote:
I am strongly considering a Z axis digital linear scale for my 7 x 16 lathe.
I am thinking I might want to mount it onto the rear side of the bed below the saddle gibs. The scale would have a remote reader that I could place anywhere within 48".
Has anyone done this? I like to get as much info and learn of any experiences others may have had when doing this mod.
Thanks
Dick
|
Re: Digital linear scale for 7x lathe?
John,
I looked at putting a dial travel indicator on the bed, but the headstock electronics cover on the Micro Mark gets in the way of the rod that comes out the rear of the indicator. How did you overcome that issue?
Dick
toggle quoted message
Show quoted text
--- In 7x12minilathe@..., John Lindo <bechetboat@...> wrote:
Hello Art.
Can you explain why it is necessary to put a digital scale on the bed.z axis.
I use a D I clamped to the bed,registering of the saddle.I could possibly see a use if you were machining a group of shoulders on a long
bar some distance away from the chuck.
I can understand the DRO's on the cross and compound if you do not trust the dials.
But those that bolt onto the ends of the handles only measure rotation of the scale and not slide movement,
and also can get in the way of travel if the compound is at an angle.
regards
John L
Spain.
________________________________
From: "art9999@..." <art@...>
To: 7x12minilathe@...
Sent: Friday, February 15, 2013 3:57 AM
Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe?
??
Dick,
I have done this on both of my 7 x 10 lathes. It works very well and is relatively easy to shield the scale from swarf.
Art
--- In 7x12minilathe@..., "Dick" wrote:
I am strongly considering a Z axis digital linear scale for my 7 x 16 lathe.
I am thinking I might want to mount it onto the rear side of the bed below the saddle gibs. The scale would have a remote reader that I could place anywhere within 48".
Has anyone done this? I like to get as much info and learn of any experiences others may have had when doing this mod.
Thanks
Dick
|
Re: Digital linear scale for 7x lathe?
Hello Art. Can you explain why it is necessary to put a digital scale on the bed.z axis. I use a D I clamped to the bed,registering of the saddle.I could possibly see a use if you were machining a group of shoulders on a long bar some distance away from the chuck. I can understand the DRO's on the cross and compound if you do not trust the dials. But those that bolt onto the ends of the handles only measure rotation of the scale and not slide movement, and also can get in the way of travel if the compound is at an angle. regards John L Spain.
From: "art9999@..."
To: 7x12minilathe@...
Sent: Friday, February 15, 2013 3:57 AM
Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe?
?
Dick,
I have done this on both of my 7 x 10 lathes. It works very well and is relatively easy to shield the scale from swarf.
Art
--- In 7x12minilathe@..., "Dick" wrote:
>
> I am strongly considering a Z axis digital linear scale for my 7 x 16 lathe.
> I am thinking I might want to mount it onto the rear side of the bed below the saddle gibs. The scale would have a remote reader that I could place anywhere within 48".
> Has anyone done this? I like to get as much info and learn of any experiences others may have had when doing this mod.
> Thanks
> Dick
>
|
Re: Digital linear scale for 7x lathe?
That's nice Art.
Where did you get the parts?? A DRO is on my list of "wants".
Thanks!
Ryan
toggle quoted message
Show quoted text
-----Original Message-----
From: art9999@...
To: 7x12minilathe <7x12minilathe@...>
Sent: Fri, Feb 15, 2013 11:51 pm
Subject: [7x12minilathe] Re: Digital linear scale for 7x lathe?
?
Dick
I have added a remote reading digital scale to two 7 x 10 lathes by placing the scale behind the lathe and below the ways. I have found that this keeps it out of the region of operating controls and doesn't restrict any of the precious 10-inch motion that I have. Also it is easy from that location to protect it from most of the swarf. Photos of one of these installations can be seen on my Photobucket site. The link is
Art
--- In 7x12minilathe@..., "Dick" wrote:
>
> I am strongly considering a Z axis digital linear scale for my 7 x 16 lathe.
> I am thinking I might want to mount it onto the rear side of the bed below the saddle gibs. The scale would have a remote reader that I could place anywhere within 48".
> Has anyone done this? I like to get as much info and learn of any experiences others may have had when doing this mod.
> Thanks
> Dick
>
|
GadgetBuilder
OldToolmaker