On 12 April 2018 at 13:27, Todd Zuercher wrote:
> If you want to try multiple drive motors, a rack and pinion becomes a very
> good option.
You can make quite a nice actuator reasonably easily by using a gear
on the motor spindle and a round rack running in suitable bushings.
http://www.hpcgear
: Re: [Emc-users] Large servo selection
Hmm. Belting is a pretty interesting idea. Though for my application, the
reverse motion of a crank/slider isn't a big negative.
I've also been toying with combining a few servos smaller servos to get the
work done. I've got no great i
On 4/12/2018 6:09 AM, andy pugh wrote:
On 11 April 2018 at 15:30, David Berndt wrote:
I'm looking to output about 1000lbf in a linear direction via a crank/slider
or ballscrew with peak speed of about 1m/s.
Have you considered hydraulics? (Or possibly even pneumatics).
Hydraulics can be pret
On 11 April 2018 at 15:30, David Berndt wrote:
> I'm looking to output about 1000lbf in a linear direction via a crank/slider
> or ballscrew with peak speed of about 1m/s.
Have you considered hydraulics? (Or possibly even pneumatics).
Hydraulics can be pretty quick with a servo-valve cylinder.
On Thursday 12 April 2018 00:38:11 Jon Elson wrote:
> On 04/11/2018 01:01 AM, David Berndt wrote:
> > Wondering if anyone had any preference/experience/advise
> > to share with single phase capable larger servos. I'm
> > looking at an application for a 3 to 5hp motor with a vfd,
> > but if I could
On Wednesday 11 April 2018 21:56:17 Chris Albertson wrote:
> If you are willing to design and build your own controller and add an
> encoder, a motor from a treadmill could work
>
But only in one direction. The flywheel/pulley/cooling fan on those I
have used is screwed onto the motor shaft, and
On 04/11/2018 01:01 AM, David Berndt wrote:
Wondering if anyone had any preference/experience/advise
to share with single phase capable larger servos. I'm
looking at an application for a 3 to 5hp motor with a vfd,
but if I could just get a servo to fill in that'd be nice.
Gear reduction will b
Hmm. Belting is a pretty interesting idea. Though for my application, the
reverse motion of a crank/slider isn't a big negative.
I've also been toying with combining a few servos smaller servos to get
the work done. I've got no great idea on that yet mechanically or
electrically. But taking
Consider using a timing belt drive. Not exactly a timing belt, but a
cogged tooth belt. They make cogged tooth belting specifically for
linear actuators.
You can buy it several inches wide so 6 hp would not be a problem. I
did a servo drive setup to propel a machine carriage with such a belt.
If you are willing to design and build your own controller and add an
encoder, a motor from a treadmill could work
On Wed, Apr 11, 2018 at 12:08 PM, John Kasunich
wrote:
>
>
> On Wed, Apr 11, 2018, at 10:30 AM, David Berndt wrote:
> > I'd like this to be reasonably low effort. My biggest concern
On Wednesday 11 April 2018 04:32:05 jeremy youngs wrote:
> Does it have to be a servo ?? 1800 in lb nema 34 steppers are
> inexpensive and your speed needs are not great , it's possible a
> stepper and a kelling drive would get you there . But again more input
> needed.
> Gene , I know of a bunch
On Wed, Apr 11, 2018, at 10:30 AM, David Berndt wrote:
> I'd like this to be reasonably low effort. My biggest concern is single
> phase input. Control/response requirements are about as low as it gets.
>
> I'm looking to output about 1000lbf in a linear direction via a
> crank/slider or bal
On Wed, Apr 11, 2018, at 3:08 PM, John Kasunich wrote:
>
>
> On Wed, Apr 11, 2018, at 10:30 AM, David Berndt wrote:
> > I'm looking to output about 1000lbf in a linear direction via a
> > crank/slider or ballscrew
> You don't mention the stroke length. Are you moving a few inches in a
>
In my zone there are a lot of big servo motor manufactorer ( 30-50 hp and
more) it work for siemens, snider, and many other big company as I
can see that power single phase is for special pourpuse only, and it can be
found normally in last page of big general product catalog of big company
On 11 April 2018 at 15:40, Ed wrote:
> I have to check on a regular VFD to drive it, Toshiba claims to be able to
> drive (most) PM motors.
The Parker Unidrive is another option, can run induction or PM motors
equally well (the clue is in the name).
Available to huge power outputs, but you proba
On 04/11/2018 08:38 AM, andy pugh wrote:
On 11 April 2018 at 14:24, Dave Cole wrote:
You can find 3 phase gearbox equipped motors on Ebay that can get you 500
rpm max.
Another alternative would be to simply get a slow-speed motor.
I have an 8-pole motor on my Rivett lathe. This one here is su
I'd like this to be reasonably low effort. My biggest concern is single
phase input. Control/response requirements are about as low as it gets.
I'm looking to output about 1000lbf in a linear direction via a
crank/slider or ballscrew with peak speed of about 1m/s. So that's a real
5hp of en
On 11 April 2018 at 14:24, Dave Cole wrote:
> You can find 3 phase gearbox equipped motors on Ebay that can get you 500
> rpm max.
Another alternative would be to simply get a slow-speed motor.
I have an 8-pole motor on my Rivett lathe. This one here is suggested
for use from 72 rpm to 1000rpm:
Snip
On Wed, Apr 11, 2018, 03:59 andy pugh wrote:
>
>
> That doesn't sound right.
>
> A brushless servo should be able to give rated torque indefinitely at
> absolutely zero rpm.
>
Mine is a brushed baldor motor , I agree a brushless will go all the way to
zero .
It sounds to me like your drive
How much time/work do you want to put into this motor/drive setup?
There are no really cheap large servo motor solutions unless you stumble
into a deal on Ebay or a surplus marketplace.
Larger servos generally mean 3 phase inputs. So that becomes an
immediate issue.
If you can live with a VF
On 11 April 2018 at 09:11, jeremy youngs wrote:
> The red caps are generally 2-3 k rpm , what response do you need at your
> lowest rpm? And what is the lowest rpm. The red caps will give you great
> low end torque but will have a threshold below which it will be weak
> usually under 50 rpm on a
Does it have to be a servo ?? 1800 in lb nema 34 steppers are inexpensive
and your speed needs are not great , it's possible a stepper and a kelling
drive would get you there . But again more input needed.
Gene , I know of a bunch of 700 ozin SLO-Syn but they are syncronous at 72
rpm, how would one
Far more information is needed to give you a fitting response. You need to
know what your actual torque needs are, even roughly quantified. I've
recently purchased several servo motors , due to not having a known torque
needed.
Your rpm requirement is quite low leaving a vfd 3phase motor wit not su
On Wednesday 11 April 2018 02:01:07 David Berndt wrote:
> Wondering if anyone had any preference/experience/advise to share with
> single phase capable larger servos. I'm looking at an application for
> a 3 to 5hp motor with a vfd, but if I could just get a servo to fill
> in that'd be nice. Gear
it's step/dir.
The STMBL is a product that has potential.
John
> -Original Message-
> From: David Berndt [mailto:ber...@uberwin.com]
> Sent: April-10-18 11:01 PM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] Large servo selection
>
> Wondering if
Wondering if anyone had any preference/experience/advise to share with
single phase capable larger servos. I'm looking at an application for a 3
to 5hp motor with a vfd, but if I could just get a servo to fill in that'd
be nice. Gear reduction will be required, but something with more torque,
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