I don't think we realise just how important
abreviations can be. Don hit the nail on the head with his reference to amateur
radio.
Imagine sending this?longhand by radio using
Morse code.
?
"Calling ZL1ATB in New?Zealand?from
MM5PSL in Scotland
I acknowledge receipt of your last transmission.
Your signals are as follows. Readability 5, Signal strength 9 and Tone 9. Best
wishes and good luck."
?
That's a lot of Morse code when it can be sent abreviated like this:
? "ZL1ATB
De?MM5PSL
QSL UR RST599. 73 es GL"
?
Off topic perhaps, but it does illustrate how we are expected to learn
abreviations and jargon if we want?to progress quickly in a?particular
field.
?
Peter
Shetland Islands
?
?
?
??
|
yep, with texting and other moads of communication we are losing the ability to communicate.
i for one refuse to text. either call me or don't bother.
and yes, almost all sites seem to have that short cut problem and thats always brought up.
when i see abbreviations my mind just shutsdown.
?
george
From: Rocket
To: 7x12minilathe@...
Sent: Wed, February 13, 2013 6:01:20 AM
Subject: RE: [7x12minilathe] Abbreviations
?
Andy
Glad you brought it up
Here is another
TIR, Total Internal Reflection
And there were more.
?
Trouble is with phones, etc lots of acronyms and shortcuts are used and I get lost in it.
I suppose I should get with the times but I store my mobile in a bucket of water because it keeps ringing.
?
Cheers,
Rod
?
From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of Andy
Sent: Wednesday, February 13, 2013 9:35 PM
To: 7x12minilathe@...
Subject: RE: [7x12minilathe] Abbreviations
?
?
Thanks for the explanation, John. It¡¯s many others as well who don¡¯t realise that newbies in this forum could be learning the hobby. My background is radio, electronics and test equipment, and when I saw the abbreviation ¡°TIR¡±, my immediate thought was Transmitted Infra Red. How wrong I was! Although I first used a lathe over 50 years ago (at school) for me it¡¯s just a hobby and I¡¯m still learning.
?
Hope this hasn¡¯t opened a bag of worms! (an English expression, but is it used anywhere else in the world?)
?
Best wishes to all,
?
Andy B
Near Southampton,
England.
?
?
?
Sorry Andy,
TIR = Total Indicator Runout.? It¡¯s how much wobble you get on the dial indicator.? The less wobble, the more your system approaches a perfect circle running concentric about the axis.?
John B
?
?
?
Hi All,
?
Would it be possible for abbreviations to not be used? As this is a forum for old timers and newbies, there are many of us who don¡¯t know what these abbreviations stand for. It doesn¡¯t take more than a few seconds to type the full name, and it would help greatly in understanding what you¡¯re talking about.
?
Many thanks,
?
Andy_b
Near Southampton
England.
?
?
?
?
John,
Great advice, but I offer a slight modification¡¡..?
Remove the chuck and check the arbor runout on the internal taper.? I¡¯ve never been happy with the chuck mounting on those three studs, as it gets a new TIR every time you mount the chuck.?
If I remember correctly, my 7x14 (from Micromark) gets better than 0.0005 TIR.? I¡¯ll try to re-check it later today.
John B
State College, PA
?
?
?
Not sure how much run time you have on your lathe.
Check the front spindle bearing by placing a piece of board on the ways under the chuck (protection)?
Put a piece of bar under the chuck and with a dial indicator and the stylus sitting on the top of the chuck,see how much lift you are getting.
you maybe using the deep groove bearings as fitted standard to the lathe,maybe change to tapered roller bearings.
At least you then can eliminate on of the variables,also check the 4 bolts pulling down the headstock are tight.
?
?
?
Is the tool properly shaped for brass? Brass needs 0 top rake; if there's any top rake the tool will try to pull into the work.
Roy
--- In 7x12minilathe@..., William McBride wrote:
>
> thanks John,Roy,Michael, The tool is on center I use a quick change tool post I am cutting 1" brass it is now chattering on all cuts not only tapers even if I take off say .005 on a side as for rpm I don't know I have no spindle tach. I tried speeding up the spindle got worse.
> Bill
>
?
|
Wont run on my 64 bit computer, that's why I mentioned it. Don ?
toggle quoted message
Show quoted text
From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of Robert Francis
Sent: Thursday, 14 February 2013 9:28 a.m.
To: 7x12minilathe@...
Cc: Don Leitch
Subject: Re: [7x12minilathe] Tool SW? ? 32 bit software will run on 64 bit machines, not the other way round.
|
Thanks Don,
are you sure you are using the right version?
- Wshop.zip contains Windows PC application (works at my Win7 64)
- Gears.zip and SX2.zip contain small applications with same functionality as previous but for Windows Mobile 6 OS - I am using them at my smart phone
toggle quoted message
Show quoted text
--- In 7x12minilathe@..., "Don Leitch" wrote:
Thanks Ivan but 2 of them are 32 bit and wont run on a 64 bit machine.
Don
|
32 bit software will run on 64 bit machines, not the other way round.
|
Re: LMS Bed Extension Kit, HiTorque 16" $99.95
Steve;
You can pick up a used bed,and lead screw on here,and,if you bolt both beds down,and line them up ,you can add another 16 in.
Lead screws can be joined by turning a lap joint,and pin it.
Someone just had a bed for sale on here,and did not know if it sold.
Just ask the group if interested.
|
--- On Wed, 2/13/13, Steve Langford wrote:
From: Steve Langford <steze480@...>
Subject: Re: [7x12minilathe] LMS Bed Extension Kit, HiTorque 16" $99.95
To: 7x12minilathe@...
Date: Wednesday, February 13, 2013, 3:57 PM
?
Hello...
I am a new member here and I have the HF 7x10...
Was a member at the 7X10 group but they talk about politics there...
Has anyone taken the bed extension for the 7X10 and extended by adding to the existing bed?
I had thought it could be done with exception of a longer lead screw...
Can this lead screw material be bought in bulk?
Does anyone know the thread pitch of the Harbor Freight 7X10 lead screw?
I have had my lathe for 3 years now for building small IC engines and general turning...
I usually buy my stock in 12" lengths and a longer bed would be helpful...
?
?  Steve Langford
From: Michael Jablonski
To: 7x12minilathe@...
Sent: Tue, February 12, 2013 11:40:15 PM
Subject: [7x12minilathe] LMS Bed Extension Kit, HiTorque 16" $99.95
?
Just a heads up. LMS has their 16 inch bed extension kit on sale for $99.95
?
This is only for their LMS 7x12 HiTorque lathe.
?
It includes a bed casting, a lead screw, a rack, a chip pan.
?
NOT a bolt on kit. It requires you to drill and tap 10 holes in the new bed casting.
?
< = >
?
|
It took me far longer to google the abbreviations than it took you to write that. Even then goggle has no idea what we are talking about This is not the only group that does this. I use telescope groups, photographic groups, radio control helicopter groups, and ham radio, the latter being the worst we are all a bunch of old codgers stuck in our ways, and whoa betide anyone who tries to change our ways The abbreviations are really a sign of laziness in my opinion and we all do it. Shall I use LOL or hi ?hi, guess we just gotta get over it. Don ?
toggle quoted message
Show quoted text
From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of Ellis Cory
Sent: Thursday, 14 February 2013 6:19 a.m.
To: 7x12minilathe@...
Subject: Re: [7x12minilathe] Abbreviations? ? ? Andy wrote......Would it be possible for abbreviations to not be used? As this is a forum for old timers and newbies, there are many of us who don¡¯t know what these abbreviations stand for......... Why is 'abbreviation' such a long word ?
|
Thanks Ivan? but 2 of them are 32 bit? and wont run on a 64 bit machine. Don ?
toggle quoted message
Show quoted text
From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of ivan.marko@...
Sent: Thursday, 14 February 2013 6:01 a.m.
To: 7x12minilathe@...
Subject: [7x12minilathe] Tool SW? ? Hi to all.
I would like to share the software that I have developed for my X2 mill dial and lathe gear calculation.
There are versions for Win an Win mobile.
Fell free to use them, comment and share!
Cheers,
Ivan
|
Anthony,
?
The change gears are indeed Mod 1.0. The one I bought from LMS for a project (I don't have a "normal" 7x lathe myself) is 12mm bore, and the keyway is 3mm wide.
?
You may have been thinking of the QC gearbox shown in the Files Section of the mlathemods group:
< ?>, in the Files section under Threading Gearboxes.
?
Andy ?
To: 7x12minilathe@... From: anthrhodes@... Date: Tue, 12 Feb 2013 21:26:39 -0500 Subject: [7x12minilathe] Gears and Gearbox ?
Hope somebody can give me some info. I believe the change gears on the 7x lathes are 1.0 module. Can somebody please tell me the bore and keyways for the gears. By the way, what is the smallest gear provided for the change gears, 20?
?
Secondly, I know that there was a semi-quick-change gearbox designed and built by one of the people who participated on these 7x groups. Can somebody please tell me on which group I can find the construction article or provide a reference to the builders web site where I can find the article.
?
Anthony
Berkeley, Calif.
|
Re: Ceramic coating swap for mods / upgrades
Please tell me more about the ceramic coating ...
Any pics ?
?
I am willing to do ceramic coating of parts, or pretty
much anything mailable, for some well done bearing
upgrades in the cross slides of my mini lathe.
I do ceramic coating as a part of my gunsmithing business
and the work is first class. I not only have done
firearms, but vehicle parts such as differential covers,
valve covers, lug-nuts and various brackets, and also
household hardware such as all the antique door hardware
that was hidden under two generations of paint in my
house. It also has proven great on tools that have seen to
much weather.
Contact me off-list if interested.
--
-hanermo
|
?There are equally true yet opposing sounding truths when it comes
to those spindle bearings.
?Many people have successfully gone for years doing just
fine with the spindle ball bearings supplied by the factory. This
holds true with the the closely related X2 mini-mills as well. Also
true is many people have gone for many years doing just fine with
the plastic gears supplied inside the headstock (HS) on the lathe or
inside the milling head on the mill as part of the factory design.
Years and years of talented work gets done and time marches on.
?So it can be said to be true that the ball bearings and the plastic
gears have, can, and should do just fine for any number of people,
assuming the user is generally attentive to what they're doing, so
to speak.
?On the opposite and also very true end of the spectrum, many people
have replaced the ball bearings with tapered bearings with great
success. Most everyone who has done this conversion reports great
improvement in rigidity and so far less trouble with chatter or
complaint from the machine when it is pushed to cut deeper and
faster than was possible before. So we have true and then we have an
also true. They do sell steel gears for inside the headstock on the
lathe but they are said to be noisy, and on the X2 mini-mill the
most common solution is a belt drive conversion (which is what I
went with) which is much QUIETER and far more forgiving of mishaps
like, say, a cutting tool suddenly slamming to a sudden stop from
digging in too deep, or the operator foolishly forgetting to remove
the locking bar before powering up the machine. Instead of breaking
plastic gear teeth, the belt just slips! Just removes all that
unwanted excitement of things getting damaged and allows the
operator to fix whatever caused the mishap, and the project
continues on.
?Ball bearings or tapered bearings, metal gears or plastic (or belt
drive conversion in the case on the mini-mill), they all can and do
work pretty well. And that is the truth. :-)
?Cheers,
?John Z., York, Pennsylvania, U.S. of Bacon.
On 2/13/2013 9:57 AM, William McBride
wrote:
?
|
Who is a good source for the tapered spindle
bearings for mini lathes? I have a micromark
7x16 it is brand new very little use is this mod
explained how to do somewhere I would have no
idea how to replace spindle bearings in the
headstock and is this needed on a new lathe? I
haven't checked the runout of the spindle yet.
|
_
|
Thanks for the help Gerry & Allen |
|
A subtle but good point Gerry. Total Indicator Runout vs. Total Indicated
Runout. I like your version, which is probably correct. I had likely heard
the not quite right version years ago and it stuck.
My version sounds like the runout comes from the indicator, yours points the
blame squarely at the thing with the runout.
To muddy the waters a tad, in my googling about I noticed Total Indicator
Reading. which
mentions Total Indicated Runout, but sadly for me does not mention Total
Indicator Runout.
John B
toggle quoted message
Show quoted text
-----Original Message----- From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of gerry waclawiak Sent: Wednesday, February 13, 2013 10:59 AM To: 7x12minilathe@... Subject: RE: [7x12minilathe] Abbreviations Hi Andy, as with any specialist subject machines have their own jargon? and abbreviations that get used in those circles but trust me it does get learned fairly quickly! TIR stands for (in machining terms) total indicated run-out and is a measure of how far out of true or being circular a rotating piece is, be it the lathe spindle, chuck or a part mounted on the lathe.It it is generally measured with a DI (Dial Indicator) or DTI ( Dial test indicator). You should try to learn and use the jargon but if you get stuck shout up and someone will help Gerry W Leeds UK ________________________________ To: 7x12minilathe@...
From: mike@...
Date: Wed, 13 Feb 2013 08:22:26 -0500
Subject: RE: [7x12minilathe] Abbreviations
Andy I too am new and have the same problem.
Mike
-----Original Message-----
From: 7x12minilathe@...
[mailto:7x12minilathe@...] On Behalf Of Andy
Sent: Wednesday, February 13, 2013 8:13 AM
To: 7x12minilathe@...
Subject: [7x12minilathe] Abbreviations
Hi All,
Would it be possible for abbreviations to not be used? As this is a
forum for old timers and newbies, there are many of us who don¡¯t know
what these abbreviations stand for. It doesn¡¯t take more than a few
seconds to type the full name, and it would help greatly in
understanding what you¡¯re talking about.
Many thanks,
Andy_b
Near Southampton
England.
From: 7x12minilathe@...
[mailto:7x12minilathe@...] On Behalf Of John Best
Sent: 13 February 2013 13:02
To: 7x12minilathe@...
Subject: RE: [7x12minilathe] Re: chatter
John,
Great advice, but I offer a slight modification¡¡..
Remove the chuck and check the arbor runout on the internal taper.
I¡¯ve never been happy with the chuck mounting on those three studs, as
it gets a new TIR every time you mount the chuck.
If I remember correctly, my 7x14 (from Micromark) gets better than
0.0005 TIR. I¡¯ll try to re-check it later today.
John B
State College, PA
From:
7x12minilathe@...<mailto:7x12minilathe@...>
[mailto:7x12minilathe@...] On Behalf Of John Lindo
Sent: Wednesday, February 13, 2013 3:23 AM
To: 7x12minilathe@...<mailto:7x12minilathe@...>
Subject: Re: [7x12minilathe] Re: chatter
Not sure how much run time you have on your lathe.
Check the front spindle bearing by placing a piece of board on the ways
under the chuck (protection)
Put a piece of bar under the chuck and with a dial indicator and the
stylus sitting on the top of the chuck,see how much lift you are
getting.
you maybe using the deep groove bearings as fitted standard to the
lathe,maybe change to tapered roller bearings.
At least you then can eliminate on of the variables,also check the 4
bolts pulling down the headstock are tight.
John L
Spain.
________________________________
From: Roy <roylowenthal@...<mailto:roylowenthal@...>>
To: 7x12minilathe@...<mailto:7x12minilathe@...>
Sent: Wednesday, February 13, 2013 3:09 AM
Subject: [7x12minilathe] Re: chatter
Is the tool properly shaped for brass? Brass needs 0 top rake; if
there's any top rake the tool will try to pull into the work.
Roy
--- In
7x12minilathe@...<mailto:7x12minilathe%40yahoogroups.com>,
William McBride wrote:
>
> thanks John,Roy,Michael, The tool is on center I use a quick change
tool post I am cutting 1" brass it is now chattering on all cuts not
only tapers even if I take off say .005 on a side as for rpm I don't
know I have no spindle tach. I tried speeding up the spindle got worse.
> Bill
>
No virus found in this message.
Checked by AVG - www.avg.com<>
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
------------------------------------ Yahoo! Groups Links _______________________________________________________ Unlimited Disk, Data Transfer, PHP/MySQL Domain Hosting
|
?
Andy wrote......Would it be possible for
abbreviations to not be used? As this is a forum for old timers and newbies,
there are many of us who don¡¯t know what these abbreviations stand
for.........
?
Why is 'abbreviation' such a long word
?
Cheers.
???????
Ellis
|
Hi to all.
I would like to share the software that I have developed for my X2 mill dial and lathe gear calculation.
There are versions for Win an Win mobile.
Fell free to use them, comment and share!
Cheers,
Ivan
|
You can find links to three different quick change gearbox builds here:
toggle quoted message
Show quoted text
--- In 7x12minilathe@..., anthrhodes@... wrote:
Hope somebody can give me some info. I believe the change gears on the 7x
lathes are 1.0 module. Can somebody please tell me the bore and keyways for
the gears. By the way, what is the smallest gear provided for the change
gears, 20?
Secondly, I know that there was a semi-quick-change gearbox designed and
built by one of the people who participated on these 7x groups. Can somebody
please tell me on which group I can find the construction article or
provide a reference to the builders web site where I can find the article.
Anthony
Berkeley, Calif.
|
On 02/13/2013 05:13 AM, Andy wrote:
Would
it be possible for abbreviations to not be used? As this is a
forum for old timers and newbies, there are many of us who don¡¯t
know what these abbreviations stand for. It doesn¡¯t take more
than a few seconds to type the full name, and it would help
greatly in understanding what you¡¯re talking about.
But "don't" and "you're" are abbreviations!? :)
ok, I'll go stand in the corner.
--
Jerry Durand, Durand Interstellar, Inc.
tel: +1 408 356-3886, USA toll free: 1 866 356-3886
Skype: jerrydurand
|
I purchased the 5" 4 jaw chuck with adaptor from LMS to turn larger square aluminum blocks and rounds for small crankcases. I have noticed more chatter with that chuck when turning steel... ? ? Steve Langford
From: John
Best
To: 7x12minilathe@...
Sent: Wed, February 13, 2013 7:02:15 AM
Subject: RE: [7x12minilathe] Re: chatter
?
John, Great advice, but I offer a slight modification¡¡..? Remove the chuck and check the arbor runout on the internal taper.? I¡¯ve never been happy with the chuck mounting on those three studs, as it gets a new TIR every time you mount the chuck.? If I remember correctly, my 7x14 (from Micromark) gets better than 0.0005 TIR.? I¡¯ll try to re-check it later today. John B State College, PA ? From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of John Lindo
Sent: Wednesday, February 13, 2013 3:23 AM
To: 7x12minilathe@...
Subject: Re: [7x12minilathe] Re: chatter ? ? Not sure how much run time you have on your lathe. Check the front spindle bearing by placing a piece of board on the ways under the chuck (protection)? Put a piece of bar under the chuck and with a dial indicator and the stylus sitting on the top of the chuck,see how much lift you are getting. you maybe using the deep groove bearings as fitted standard to the lathe,maybe change to tapered roller bearings. At least you then can eliminate on of the variables,also check the 4 bolts pulling down the headstock are tight. ?
From: Roy
To: 7x12minilathe@...
Sent: Wednesday, February 13, 2013 3:09 AM
Subject: [7x12minilathe] Re: chatter ? ? Is the tool properly
shaped for brass? Brass needs 0 top rake; if there's any top rake the tool will try to pull into the work.
Roy
--- In 7x12minilathe@..., William McBride wrote:
>
> thanks John,Roy,Michael, The tool is on center I use a quick change tool post I am cutting 1" brass it is now chattering on all cuts not only tapers even if I take off say .005 on a side as for rpm I don't know I have no spindle tach. I tried speeding up the spindle got worse.
> Bill
> ?
|
Andy/Mike,
The jargon and lingo is like a foreign language, if you go abroad the locals would help you out as a beginner but you will be expected to learn it over time as a common courtesy
Gerry W
Leeds UK
toggle quoted message
Show quoted text
To: 7x12minilathe@...
From: mike@...
Date: Wed, 13 Feb 2013 08:22:26 -0500
Subject: RE: [7x12minilathe] Abbreviations
Andy I too am new and have the same problem.
Mike
-----Original Message-----
From: 7x12minilathe@...
[mailto:7x12minilathe@...] On Behalf Of Andy
Sent: Wednesday, February 13, 2013 8:13 AM
To: 7x12minilathe@...
Subject: [7x12minilathe] Abbreviations
Hi All,
Would it be possible for abbreviations to not be used? As this is a
forum for old timers and newbies, there are many of us who don¡¯t know
what these abbreviations stand for. It doesn¡¯t take more than a few
seconds to type the full name, and it would help greatly in
understanding what you¡¯re talking about.
Many thanks,
Andy_b
Near Southampton
England.
From: 7x12minilathe@...
[mailto:7x12minilathe@...] On Behalf Of John Best
Sent: 13 February 2013 13:02
To: 7x12minilathe@...
Subject: RE: [7x12minilathe] Re: chatter
John,
Great advice, but I offer a slight modification¡¡..
Remove the chuck and check the arbor runout on the internal taper.
I¡¯ve never been happy with the chuck mounting on those three studs, as
it gets a new TIR every time you mount the chuck.
If I remember correctly, my 7x14 (from Micromark) gets better than
0.0005 TIR. I¡¯ll try to re-check it later today.
John B
State College, PA
From:
7x12minilathe@...<mailto:7x12minilathe@...>
[mailto:7x12minilathe@...] On Behalf Of John Lindo
Sent: Wednesday, February 13, 2013 3:23 AM
To: 7x12minilathe@...<mailto:7x12minilathe@...>
Subject: Re: [7x12minilathe] Re: chatter
Not sure how much run time you have on your lathe.
Check the front spindle bearing by placing a piece of board on the ways
under the chuck (protection)
Put a piece of bar under the chuck and with a dial indicator and the
stylus sitting on the top of the chuck,see how much lift you are
getting.
you maybe using the deep groove bearings as fitted standard to the
lathe,maybe change to tapered roller bearings.
At least you then can eliminate on of the variables,also check the 4
bolts pulling down the headstock are tight.
John L
Spain.
________________________________
From: Roy <roylowenthal@...<mailto:roylowenthal@...>>
To: 7x12minilathe@...<mailto:7x12minilathe@...>
Sent: Wednesday, February 13, 2013 3:09 AM
Subject: [7x12minilathe] Re: chatter
Is the tool properly shaped for brass? Brass needs 0 top rake; if
there's any top rake the tool will try to pull into the work.
Roy
--- In
7x12minilathe@...<mailto:7x12minilathe%40yahoogroups.com>,
William McBride wrote:
>
> thanks John,Roy,Michael, The tool is on center I use a quick change
tool post I am cutting 1" brass it is now chattering on all cuts not
only tapers even if I take off say .005 on a side as for rpm I don't
know I have no spindle tach. I tried speeding up the spindle got worse.
> Bill
>
No virus found in this message.
Checked by AVG - www.avg.com<>
Version: 2013.0.2897 / Virus Database: 2639/6099 - Release Date: 02/12/13
|
Hi Andy,
as with any specialist subject machines have their own jargon? and abbreviations that get used in those circles but trust me it does get learned fairly quickly!
TIR stands for (in machining terms) total indicated run-out and is a measure of how far out of true or being circular a rotating piece is, be it the lathe spindle, chuck or a part mounted on the lathe.It it is generally measured with a DI (Dial Indicator) or DTI ( Dial test indicator).
You should try to learn and use the jargon but if you get stuck shout up and someone will help
Gerry W
Leeds UK
________________________________
toggle quoted message
Show quoted text
To: 7x12minilathe@...
From: mike@...
Date: Wed, 13 Feb 2013 08:22:26 -0500
Subject: RE: [7x12minilathe] Abbreviations
Andy I too am new and have the same problem.
Mike
-----Original Message-----
From: 7x12minilathe@...
[mailto:7x12minilathe@...] On Behalf Of Andy
Sent: Wednesday, February 13, 2013 8:13 AM
To: 7x12minilathe@...
Subject: [7x12minilathe] Abbreviations
Hi All,
Would it be possible for abbreviations to not be used? As this is a
forum for old timers and newbies, there are many of us who don¡¯t know
what these abbreviations stand for. It doesn¡¯t take more than a few
seconds to type the full name, and it would help greatly in
understanding what you¡¯re talking about.
Many thanks,
Andy_b
Near Southampton
England.
From: 7x12minilathe@...
[mailto:7x12minilathe@...] On Behalf Of John Best
Sent: 13 February 2013 13:02
To: 7x12minilathe@...
Subject: RE: [7x12minilathe] Re: chatter
John,
Great advice, but I offer a slight modification¡¡..
Remove the chuck and check the arbor runout on the internal taper.
I¡¯ve never been happy with the chuck mounting on those three studs, as
it gets a new TIR every time you mount the chuck.
If I remember correctly, my 7x14 (from Micromark) gets better than
0.0005 TIR. I¡¯ll try to re-check it later today.
John B
State College, PA
From:
7x12minilathe@...<mailto:7x12minilathe@...>
[mailto:7x12minilathe@...] On Behalf Of John Lindo
Sent: Wednesday, February 13, 2013 3:23 AM
To: 7x12minilathe@...<mailto:7x12minilathe@...>
Subject: Re: [7x12minilathe] Re: chatter
Not sure how much run time you have on your lathe.
Check the front spindle bearing by placing a piece of board on the ways
under the chuck (protection)
Put a piece of bar under the chuck and with a dial indicator and the
stylus sitting on the top of the chuck,see how much lift you are
getting.
you maybe using the deep groove bearings as fitted standard to the
lathe,maybe change to tapered roller bearings.
At least you then can eliminate on of the variables,also check the 4
bolts pulling down the headstock are tight.
John L
Spain.
________________________________
From: Roy <roylowenthal@...<mailto:roylowenthal@...>>
To: 7x12minilathe@...<mailto:7x12minilathe@...>
Sent: Wednesday, February 13, 2013 3:09 AM
Subject: [7x12minilathe] Re: chatter
Is the tool properly shaped for brass? Brass needs 0 top rake; if
there's any top rake the tool will try to pull into the work.
Roy
--- In
7x12minilathe@...<mailto:7x12minilathe%40yahoogroups.com>,
William McBride wrote:
>
> thanks John,Roy,Michael, The tool is on center I use a quick change
tool post I am cutting 1" brass it is now chattering on all cuts not
only tapers even if I take off say .005 on a side as for rpm I don't
know I have no spindle tach. I tried speeding up the spindle got worse.
> Bill
>
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maschwiebert
gerry waclawiak