Linuxcnc with the bldc component can certainly drive an induction
motor or other 3-phase motor as a variable frequency drive, but I
have never heard the term "VFD" used for driving two-phase steppers
before. What Andy was suggesting, and what I looked up, was doing
the full FOC drive of steppers
Thanks, this might be of value to someone who wants a VFD for the cost of a
few h-bridges.
On Wed, Jan 12, 2022 at 6:35 PM Ralph Stirling <
ralph.stirl...@wallawalla.edu> wrote:
> The bldc.c component computes the two-phase sin/cos
> terms from phase angle, but I don't think it outputs them,
>
The bldc.c component computes the two-phase sin/cos
terms from phase angle, but I don't think it outputs them,
so a very slight modification would be necessary. The sin/cos
output values would be connected to PWM inputs in hostmot2,
which would generate the actual signals for two H-bridges to
So how would I connect the four wire stepper motor to my PC to allow for
software commutation and continuous rotation of a stepper?
If this works, it could save people money by eliminating the need for a VFD
spindle drive and also
People are paying quite a lot for these self-contained
Gesendet mit der mobilen Mail App
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That probably means that the item is in stock in Mississauga and it must be
shipped from there to the distribution centre nearest you. I sometimes get
similar, surprising, delays.
-Original Message-
From: John Dammeyer
Sent: January 12, 2022 1:14 PM
To: 'Enhanced Machine Controller
And it should be here next Wednesday. I have so many projects on the go I
really don't need another one and with this one I can buy my way out.
> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: January-12-22 10:14 AM
> To: 'Enhanced Machine Controller
Victoria,BC. And for me it promises delivery on the 19th. Odd eh?
> -Original Message-
> From: ken.stra...@gmail.com [mailto:ken.stra...@gmail.com]
> Sent: January-12-22 10:03 AM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: Re: [Emc-users] ER-32 Collet Wrench
>
> I'm over 100KM
I'm over 100KM from Toronto but Amazon still promises delivery to here
tomorrow. I thought that you were in Vancouver...
-Original Message-
From: John Dammeyer
Sent: January 12, 2022 12:53 PM
To: 'Enhanced Machine Controller (EMC)'
Subject: Re: [Emc-users] ER-32 Collet Wrench
For me
For me it's delivery in one week and with taxes just under $20.
Thanks
John
> -Original Message-
> From: ken.stra...@gmail.com [mailto:ken.stra...@gmail.com]
> Sent: January-12-22 5:28 AM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: Re: [Emc-users] ER-32 Collet Wrench
>
>
On Wed, 12 Jan 2022 at 14:43, Stuart Stevenson wrote:
> The length of the handle is purposely short as most people will use way too
> much torque to tighten the lock nut. Exceeding the chuck manufacturer's
> torque specification will not help in the holding capability and will
> result in less
I made my wrench about 12 years ago - or more. It is just made from mild
steel heated and quenched in oil just to put a black finish on it. It has
worked well in my hobby shop and the teeth show no signs of wear. It seemed
like the ones I could buy at the time were too expensive and I was probably
I think you can find even cheaper ones on Amazon, the hook style ones are
around $8US, and the same style you linked to can be had for as little as
$11US. All with free shipping with Prime.
We normally use a hook style end on a torque wrench for tightening (to 90ft-lbs
on ER40 collet nuts and
https://www.amazon.ca/ER-32UM-Spanner-Precision-Milling-Clamping/dp/B089RXC7K1
ca$18.50 delivered tomorrow.
-Original Message-
From: John Dammeyer
Sent: January 12, 2022 3:48 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] ER-32 Collet Wrench
So my Collet chuck arrived
The length of the handle is purposely short as most people will use way too
much torque to tighten the lock nut. Exceeding the chuck manufacturer's
torque specification will not help in the holding capability and will
result in less accuracy of the resulting assembly. Over torquing the
assembly
On Wed, 12 Jan 2022 at 10:50, John Dammeyer wrote:
> So my Collet chuck arrived a week or so ago. Today the ER-32 collet set
> arrived. I no longer have an excuse for not completing my 4th axis driven
> by a real harmonic drive. (Well it is raining and can't cast). So I have
> drawn up the
Looks like you could cnc it then use a bandsaw to cut the inside corners of the
teeth.
On Wednesday, January 12, 2022, 01:49:54 AM MST, John Dammeyer
wrote:
So my Collet chuck arrived a week or so ago. Today the ER-32 collet set
arrived. I no longer have an excuse for not
This style would be easier to machine on a mill.
> On 12 Jan 2022, at 08:48, John Dammeyer wrote:
>
> So my Collet chuck arrived a week or so ago. Today the ER-32 collet set
> arrived. I no longer have an excuse for not completing my 4th axis driven by
> a real harmonic drive. (Well it
On Wed, 12 Jan 2022 at 01:28, Chris Albertson wrote:
> This library would allow the stepper to be commanded
> as if it were a serial interfaced servo motor.
In principle so does LinuxCNC HAL and the "bldc" HAL component.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
On Wed, 12 Jan 2022 at 08:50, John Dammeyer wrote:
> However, I foolishly did not order a collet wrench
I have only ever used hook-wrench style ones. It hasn't been a problem.
Or CNC then file out the corners of the teeth, by hand.
--
atp
"A motorcycle is a bicycle with a pandemonium
So my Collet chuck arrived a week or so ago. Today the ER-32 collet set
arrived. I no longer have an excuse for not completing my 4th axis driven by a
real harmonic drive. (Well it is raining and can't cast). So I have drawn up
the face plate adaptor and that looks to be a pretty easy LCNC
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