Based on the feedback, I'll look for a way to use the one slider for
both purposes, while preserving the absolute units/minute readout.
Hopefully a dig into the code will reveal an elegant way to do that.
Thanks for the helpful and encouraging replies!
John
On 01/07/2017 01:32 PM, Chris Morley wrote:
> It is still possible to have the MV slider display actual feed rate while the
>
> underlying code uses percentage.
>
> It just means the GUI must calculate what feedrate is that percentage of max
> velocity and
>
> display it. I've done the opposite in Gscreen to show MV as a percentage.
>
> Then everyobe can be happy [😊]
> Chris M
> ________________________________
> From: sam sokolik <sa...@empirescreen.com>
> Sent: January 7, 2017 2:27 PM
> To: EMC developers
> Subject: Re: [Emc-developers] Max velocity slider and pure rotary motion
>
> I love the MV slider - use it all the time. I need to know that
> feedrate because a lot of the time I am capping the velocity to the feed
> rate for testing (or just above) I don't know the solution (as of right
> now I don't need to cap rotary only motion) But the scaling of actual
> feed rate is a must for me.
>
> sam
>
> On 01/07/2017 04:16 AM, Niemand Sonst wrote:
>> Hallo John,
>>
>> I agree with you, that the actual behavior is not what a user expect.
>> Just changing max_vel to "%-Slider" is unfortunately not enough, as also
>> the GUI must be changed to support the new feature.
>>
>> I from my side can tell that for gmoccapy the amount of work is doable.
>> I will be pleased to do that.
>>
>> Norbert
>>
>> Am 07.01.2017 um 09:42 schrieb John Morris:
>>> I've been asked about some seemingly unintuitive behavior: the max
>>> velocity slider is not applied to rotary-only motion. You can try this
>>> yourself by running the `axis_9axis.ini` config, setting the max
>>> velocity slider to zero, and noting rotary axes still move after e.g.
>>> `g0 a180 f40`.
>>>
>>> This can't be trivially fixed by applying the max velocity setting to
>>> rotary-only motion. Back in 2007, Chris explained [1] (referring to a
>>> document still available from NIST [2]) that feed rate in units/minute
>>> can be unintuitive for rotary-only motion, since the units are degrees
>>> instead of inches or millimeters.
>>>
>>> Ok, so damned if we do, and damned if we don't; then what are the other
>>> options? Axis has a couple of instructive examples:
>>>
>>> - The rapid override slider reads on a percentage scale, and the same
>>> slider does what one would expect, both for linear and rotary-only motion.
>>>
>>> - The jog speed slider reads in linear units/minute, and when a rotary
>>> axis is configured a second slider reading in degrees/minute appears.
>>>
>>> Right now, I'm leaning toward recommending the max velocity slider be
>>> changed to a percentage scale and applied to both, similar to rapid
>>> override. I'd love to hear other opinions. Thanks-
>>>
>>> John
>>>
>>> [1]: https://sourceforge.net/p/emc/mailman/message/13618943/
>>> [2]: http://ws680.nist.gov/publication/get_pdf.cfm?pub_id=823374
> The NIST RS274NGC Interpreter - Version
> 3<http://ws680.nist.gov/publication/get_pdf.cfm?pub_id=823374>
> ws680.nist.gov
> RS274/NGC Interpreter - Version 3 ii Disclaimer Commercial equipment and
> materials are identified in order to specify certain procedures adequately.
>
>
>
>>>
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