vel-cmd " so there is no need for the ddt step. I will try
that.
// Lars
> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: den 19 januari 2012 22:04
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Changing the scale
On 19 January 2012 20:43, Lars Andersson wrote:
> I think I will try to change the A-axis to velocity mode and put a HAL
> component in series that takes the derivative of commanded position
That might not be necessary, you can probably use the existing axis
velocity pin.
(axis.3.join-vel-cmd) c
:15
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Changing the scale factor of an axis
>
> On 01/18/2012 12:41 PM, Lars Andersson wrote:
> > This immediately gives a "joint 3 following error" even for a very
> small
> > change.
> >
> >
On 01/18/2012 12:41 PM, Lars Andersson wrote:
> This immediately gives a "joint 3 following error" even for a very small
> change.
>
> Can I work around this?
The problem appears to be, as someone pointed out, that changing the
scale factor also causes a step in the output due to a multiplying th
On 18 January 2012 20:41, Lars Andersson wrote:
> This is not allowed, "stepgen.3.position-scale" is a parameter, not a pin
You could put a "scale" component between the axis and the stepgen.
I think, though, that you might have more luck putting the A stepgen
into velocity mode, and linking to
Lars,
Take a look at the THC comp to see how I hijacked the position commanded
for Z and lied about the position feedback.
John
On 1/18/2012 2:53 PM, Ben Jackson wrote:
> On Wed, Jan 18, 2012 at 09:41:12PM +0100, Lars Andersson wrote:
>> I try manually while running:
>>
>> setp stepgen.3.positi
I think as long as you're modeling your extruder as an axis, you can't change
it's speed without also changing the speed of all the other axes (by using the
feed override knob on the motion controller).
Also, as long as your extruder's position is controlled by the motion
controller, you won't
On Wed, Jan 18, 2012 at 09:41:12PM +0100, Lars Andersson wrote:
> I try manually while running:
>
> setp stepgen.3.position-scale 210 (it was was 200 before)
>
> This immediately gives a "joint 3 following error" even for a very small
> change.
That's because the absolute position of A just m
2012/1/18 Lars Andersson :
>
> net flowrate stepgen.3.position-scale <= input.0.abs-rx-position
>
> This is not allowed, "stepgen.3.position-scale" is a parameter, not a pin
Then You can solve the cause of the problem - change it from parameter to pin.
In simple HAL module it would require changi
I would like to dynamically change the flow rate of material feed of my
plastic rapid prototyper. The material is dispensed by a step motor on the
A-axis. A is running proportional to the combined speed of X and Y (always
counting up) . The scale factor for A is set at the G-code generation, it is
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