Hi
I want to describe my understanding for low feed system.
I will use direct drive mounting and that mean 5 revolutions for 1 inch of
travel per minute.
5 revolution times 360 degree is 1800 degree per 1 inch per minute.
0.0001 travel per minute means system will have 1.8 degree per minute.
My
Hi
I (we?) have no idea of the application, but if the system is always going
to operate at low speeds, what about a fat flywheel on the drive motor to
smooth things out?
Regards
Roland
On 23/04/2008, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Hi
I want to describe my understanding for low
] Very low PRM system.
Hi
I want to describe my understanding for low feed system.
I will use direct drive mounting and that mean 5 revolutions for 1 inch of
travel per minute.
5 revolution times 360 degree is 1800 degree per 1 inch per minute.
0.0001 travel per minute means system will have 1.8
-users] Very low PRM system.
Hi
I want to describe my understanding for low feed system.
I will use direct drive mounting and that mean 5 revolutions for 1 inch
of
travel per minute.
5 revolution times 360 degree is 1800 degree per 1 inch per minute.
0.0001 travel per minute means system
Enough for what? At that slow rate (with n o dynamic load) the servo system
will basically step one count at a time at the 2.7 Hz rate but each step will
only advance 600 nano inches, Are your mechanics good enough that this
matters?
Even with a variable load +-10 counts should be easy,
Roland Jollivet wrote:
Hi
I (we?) have no idea of the application, but if the system is always
going to operate at low speeds, what about a fat flywheel on the drive
motor to smooth things out?
You'd need an incredible flywheel to smooth out a motor movong
at 1.8 degrees per minute! I
Hi
I have 3 questions.
First if to make motor work on very low feed 0.001 per minute need only
high resolution encoder than may be needed belt reduction to the encoder
shaft only, to get more pulses and not to whole motor shaft. Is this
correct?
Second, what is reasonable low feed with direct
At 01:09 PM 4/22/2008, you wrote:
Hi
I have 3 questions.
First if to make motor work on very low feed 0.001 per minute need only
high resolution encoder than may be needed belt reduction to the encoder
shaft only, to get more pulses and not to whole motor shaft. Is this
correct?
Second, what is
Hi Aram,
I did find a high res encoder at 1250K counts/rev. I'm not really
certain that is ppr or in quadrature.
Price is in the $1000 range.
http://www.opticalencoder.com/pdf/CP-850-950-HHC.pdf
Dave
On Apr 22, 2008, at 11:09 AM, [EMAIL PROTECTED] wrote:
Hi
I have 3 questions.
First if
Hello, I use to read the list to get more insight on different aspects
related to EMC.
Right now we are facing some problems related to PID tuning.
And when I have read this
If you have a good analog velocity mode system you can get smooth
motion at
slow speeds without a high line count
On Tue, 22 Apr 2008, jros wrote:
Date: Tue, 22 Apr 2008 22:06:01 +0200
From: jros [EMAIL PROTECTED]
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Cc: Casas Olcoz, Alberto [EMAIL PROTECTED],
Alberto Casas [EMAIL PROTECTED]
Subject: Re: [Emc-users] Very low PRM
Hi
I want to build system to tool grinder and that means that my system
should behave stable on very low RPM.
Minimum PRM 0.0001 per minute. I want to use direct drive with ball screw
5 rev per inch or 1 rev for 5 mm in case of metric system.
My motors have 8192 pulse per
.. it takes 4x8192 per
Aram,
I have no answer but a caution...
When you move at .0001/min,
will a 'step' of .0001 every minute be ok?
I'm not talking about stepper motors,
I'm saying some analog servo controls will simply
force a jerk of .0001 every minute,
They will not move in an analog fashion at that rate.
[EMAIL PROTECTED] wrote:
Hi
I want to build system to tool grinder and that means that my system
should behave stable on very low RPM.
Minimum PRM 0.0001 per minute. I want to use direct drive with ball screw
5 rev per inch or 1 rev for 5 mm in case of metric system.
My motors have 8192
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