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Velocity and Acceleration settings as well as table travel nos for a RF30 mill

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8 years 8 months ago #106774 by Todd Zuercher
Several of the cnc routers I have set up use acceleration settings of 25i/s/s and 10i/s max vel. And those are very reasonable numbers for a router table. A milling machine might be better served with a max vel of half that but the acceleration should still be fine.

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8 years 7 months ago #106985 by andypugh

stioc wrote: Sorry, I should've been more clear. I was referring to 10 in/s/s (600 in/s)


10 in/s/s is _not_ 600 in/s

One is a velocity and one is an acceleration. Different units because they are different things.

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8 years 7 months ago #106993 by stioc
Andy, thanks for the response - enjoy your YT videos. Anyway, I get that they're two different things basically a Yamaha R1 doing 190mph (km/h for you) vs. the same bike doing 0-100km in 3 secs. So they both can be described in the same <distance>/<sec> unit. Just trying to understand what I'm missing here.

My mill is pretty close to being functional and the values I chose for it are 0.35 in/s for velocity and 1 in/s/s for acceleration and they seem to work well.

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8 years 7 months ago #106995 by andypugh

stioc wrote: Andy, thanks for the response - enjoy your YT videos. Anyway, I get that they're two different things basically a Yamaha R1 doing 190mph (km/h for you) vs. the same bike doing 0-100km in 3 secs. So they both can be described in the same <distance>/<sec> unit. Just trying to understand what I'm missing here.


Actually, I am in the UK and my R1 does mph. (and tops out at 186 mph, apparently).

But, anyway.

190 m / h has units of distance over time.

0-100 km / h in 3 seconds has units of distance / time / time.

You are losing the /h in your 0-100km/h
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8 years 7 months ago #107013 by rodw

andypugh wrote: Actually, I am in the UK and my R1 does mph. (and tops out at 186 mph, apparently).


Well, it actually does km/hr too, its just your speedo is out by a factor of 1.609!
So your R1 is travelling at 100 km/hr, its doing 27.77 m/sec (in SI units)

Andy, the question everyone wants answered is can your R1 accelerate at an average of 9.26 m/sec/sec to achieve 100 km per hour in 3 seconds?

Thats approaching Tesla ludicrous mode performance so we need video evidence please! :) :)

And yes, the numbers are really quite different. I think acceleration is hard to grasp for the non engineering layperson.

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8 years 7 months ago #107021 by andypugh

rodw wrote:

andypugh wrote: Andy, the question everyone wants answered is can your R1 accelerate at an average of 9.26 m/sec/sec to achieve 100 km per hour in 3 seconds?


No, it is listed as 3.04 seconds to 97km/h (60 mph).

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