Hi Peter,
thanks for you reply.
Its hard to tell with motor specifications, sometimes they are RMS and
sometimes they are DC (for example lots of large BLDC motors are rated 320V
which actually means they are 220V AC motors)
I see. I'll stick with 24 V for now, the power supply is a 350 W
Hi Andy,
I decided to put the system on my desk to investigate the case, this
took a while.
How are you commutating?
The present configuration is 'qh'(use encoder input, use hall sensor
input). I didn't override the default commutation setting, so I think
its sinusoidal.
Here are my config
] BLDC Servo Torque Problem?
Hi Peter,
thanks for you reply.
Its hard to tell with motor specifications, sometimes they are RMS and
sometimes they are DC (for example lots of large BLDC motors are rated 320V
which actually means they are 220V AC motors)
I see. I'll stick with 24 V for now
Hi,
an brief update, because my current measurement was wrong.
I now used a normal ampere meter (Flue 87V) and measured a maximum
current of 3.5 A. (I commanded the motor to a position where the phase I
observed was at maximum current under low load and than increased the
load until the motor
Hi Peter
Where did you measure the current?
I measured one phase.
(you may indeed measure 600mA in the power
leads with current limiting (7.5A) in the driver)
The 600 mA was mistake, current reaches 3.5 A actually.
If you see a red LED light on the 7I39, you have reached the current
On 29 Mar 2014, at 22:08, Florian Rist fr...@fs.tum.de wrote:
How are you commutating?
The present configuration is 'qh'(use encoder input, use hall sensor
input). I didn't override the default commutation setting, so I think
its sinusoidal.
It is probably worth checking that it works
Hi Andy
It is probably worth checking that it works properly in plain
h mode as a test that the hall pattern is correct.
I'll try.
What would be the best setting? The drivers have 3 hall sensors and a
4000 CPR encoder with index.
But the 600mA at stall looks like the real issue.
No, this
On 29 March 2014 23:17, Florian Rist fr...@fs.tum.de wrote:
What would be the best setting? The drivers have 3 hall sensors and a
4000 CPR encoder with index.
qh is almost certainly the best. You could try qhi if, and only if,
you are sure of the index pulse orientation.
--
atp
If you can't
Hi Peter,
I'll pull the current limit jumper and report back. Thanks.
OK, now the jumper are moved from left to right and I reached 6 A max.
on one phase. Better. Torque does not feel much stronger though.
And the over current LED still light up. But now the current limit is
protecting the
Hi Andy
qh is almost certainly the best. You could try qhi if, and only
if, you are sure of the index pulse orientation.
I don't know the orientation aka offset, but I tried to measure it, by
observing the index signal, the encoder counter and the hall sensors in
hal scope. I think I got it
On 27 March 2014 17:31, Florian Rist fr...@fs.tum.de wrote:
Mesa 7i39-LV
Nanotec DB57L01 + 4000 CPR endoder
How are you commutating?
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
On Thu, 27 Mar 2014, Florian Rist wrote:
Date: Thu, 27 Mar 2014 18:31:12 +0100
From: Florian Rist fr...@fs.tum.de
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] BLDC
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