Those here who have had to deal with a worn out ball screw. How is this
normally manifested. I have a machine that is only showing backlash under
load. Is that normally how a worn out screw shows it's age? I was expecting
it to be normal loose backlash that you can measure. But this is show
From: Stuart Stevenson
> Sent: Monday, April 12, 2021 11:12 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Worn Ball Screw?
>
> [EXTERNAL EMAIL] Be sure links are safe.
>
> Plus or minus .010 is an amazing amount. Also, you mentioned another area
> on the sc
dd Zuercher
>> P. Graham Dunn Inc.
>> 630 Henry Street
>> Dalton, Ohio 44618
>> Phone: (330)828-2105ext. 2031
>>
>> -Original Message-----
>> From: Stuart Stevenson
>> Sent: Monday, April 12, 2021 11:12 PM
>> To: Enhanced Machine Controll
Dalton, Ohio 44618
> Phone: (330)828-2105ext. 2031
>
> -Original Message-
> From: Roland Jollivet
> Sent: Tuesday, April 13, 2021 11:23 AM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] Worn Ball Screw?
>
> [EXTERNAL EMAIL] Be sure links are safe
On 4/12/21 9:48 AM, Todd Zuercher wrote:
Those here who have had to deal with a worn out ball screw. How is this normally manifested. I have a
machine that is only showing backlash under load. Is that normally how a worn out screw shows it's age?
I was expecting it to be normal loose backla
Thrust bearings at the ball screw ends perhaps?
-- Ralph
From: Todd Zuercher [to...@pgrahamdunn.com]
Sent: Monday, April 12, 2021 7:48 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] Worn Ball Screw?
CAUTION: This email originated from
Could this be a worn thrust bearing instead? I had a similar behavior a few
years ago and that was the cause.
Leonardo Marsaglia
El lun., 12 abr. 2021 15:25, Todd Zuercher escribió:
> Those here who have had to deal with a worn out ball screw. How is this
> normally manifested. I have a machi
th the nut still on it because they may
have to work on both. My $0.02 of coarse.
> -- Ralph
>
> From: Todd Zuercher [to...@pgrahamdunn.com]
> Sent: Monday, April 12, 2021 7:48 AM
> To: Enhanced Machine Controller (EMC)
> Subject: [Em
On Mon, 12 Apr 2021 at 21:57, Gene Heskett wrote:
>
> On Monday 12 April 2021 14:55:18 Ralph Stirling wrote:
>
> > Thrust bearings at the ball screw ends perhaps?
> You may want to read it again Ralph, the screw is fixed, with a rotating
> nut.
The nut rotates in bearings, however.
Personally I
k on both. My $0.02 of coarse.
>> -- Ralph
>>
>> From: Todd Zuercher [to...@pgrahamdunn.com]
>> Sent: Monday, April 12, 2021 7:48 AM
>> To: Enhanced Machine Controller (EMC)
>> Subject: [Emc-users] Worn Ball Screw?
>>
>&
On 04/12/2021 09:48 AM, Todd Zuercher wrote:
Those here who have had to deal with a worn out ball screw.
I'd dig into the works and examine everything. It does NOT
sound like simple wear.
The rotating nut likely runs in a pair of either
angular-contact bearings or tapered roller
bearings. The
Plus or minus .010 is an amazing amount. Also, you mentioned another area
on the screw you saw .001 lost motion. This leads to a screw problem.
I would do what Jon Elson says as this sounds strange but I would expect to
find screw wear. If it was nut wear the backlash in all areas of the screw
woul
Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-Original Message-
From: Stuart Stevenson
Sent: Monday, April 12, 2021 11:12 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Worn Ball Screw?
[EXTERNAL EMAIL] Be sure links are safe.
Plus or m
I have no experience with this but I've read about people using oversized
balls to fix this. I think it is a stop-gap. But you can see how they
would ride above the center of the groove and be very solid. They are
talking *very tiny* amount of oversize.I seem to remember having to
sort the
Controller (EMC)
Subject: [Emc-users] Worn Ball Screw?
[EXTERNAL EMAIL] Be sure links are safe.
Did you try PGM Reball (saw them on an old video I have)
On Tue, 13 Apr 2021 at 14:38, Todd Zuercher wrote:
> Yes, near the limit switch, outside of the normal travel area, I can
> not measu
On Wed, Apr 14, 2021 at 8:54 AM Thomas J Powderly wrote:
> A few of the larger EDMs we built had 5meter leadscrews with dbl nuts,
>
That would fix the issue too. They use two nuts with a spring between
them. It is really the same concept as oversized balls. In both cases,
the balls ride on t
On Wed, 14 Apr 2021 at 17:17, Chris Albertson wrote:
> That would fix the issue too. They use two nuts with a spring between
> them.
Not always a spring. You can create a preloaded pair by simply
screwing them into each other and locking the angular arrangement.
Though the style that use this
On Wednesday 14 April 2021 12:15:11 Chris Albertson wrote:
> On Wed, Apr 14, 2021 at 8:54 AM Thomas J Powderly
wrote:
> > A few of the larger EDMs we built had 5meter leadscrews with dbl
> > nuts,
>
> That would fix the issue too. They use two nuts with a spring
> between them. It is really t
[Emc-users] Worn Ball Screw?
[EXTERNAL EMAIL] Be sure links are safe.
On Wed, Apr 14, 2021 at 8:54 AM Thomas J Powderly wrote:
> A few of the larger EDMs we built had 5meter leadscrews with dbl nuts,
>
That would fix the issue too. They use two nuts with a spring between
them. It is real
Todd,
I used Barnes for high quality and PSI for quick service.
Scott H
On Monday, April 12, 2021, 1:24:35 PM CDT, Todd Zuercher
wrote:
Those here who have had to deal with a worn out ball screw. How is this
normally manifested. I have a machine that is only showing backlash under
One more idea. Move the nut one foot to the left so that it rides on the
unworn part of the screw. Then use a one-foot-long spacer to connect the
nut to the machine. You do lose one foot of travel.
About Andy's idea of not using a spring between the two nuts: That works
if the screw is really
On Wed, Apr 14, 2021 at 12:38 PM andy pugh wrote:
> On Wed, 14 Apr 2021 at 17:17, Chris Albertson
> wrote:
>
> > That would fix the issue too. They use two nuts with a spring between
> > them.
>
> Not always a spring. You can create a preloaded pair by simply
> screwing them into each other an
On 4/12/21 9:48 AM, Todd Zuercher wrote:
Those here who have had to deal with a worn out ball screw. How is this normally manifested. I have a machine that is only showing backlash under load.
You might put an indicator between the ball and the table - check for mounting slop? If the bal
There are companies that regrind and reball ballscrews. One I looked into
claimed they could grind rolled ballscrews to be as precise as ground screws.
Some ballscrews have every other ball undersized to further reduce friction,
but it also reduces load capacity. Replacing the spacer balls with
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