hi
i will use that setting for grinding, tool grinding and slow feed is
should be there to make grinding process work. everage feed 0.001 inch per
minute. But i want to system be stable at 0.0001 inch per minute to
machine work stable.
i want to find all possobilities on this matter, before any building
> On Wed, 23 Apr 2008 [EMAIL PROTECTED] wrote:
>
>> Date: Wed, 23 Apr 2008 09:14:49 -0600 (MDT)
>> From: [EMAIL PROTECTED]
>> Reply-To: "Enhanced Machine Controller (EMC)"
>> <emc-users@lists.sourceforge.net>
>> To: "Enhanced Machine Controller (EMC)"
>> <emc-users@lists.sourceforge.net>
>> Subject: Re: [Emc-users] Very low PRM system.
>>
>> Hi
>> I want to describe my understanding for low feed system.
>> I will use direct drive mounting and that mean 5 revolutions for 1 inch
>> of
>> travel per minute.
>> 5 revolution times 360 degree is 1800 degree per 1 inch per minute.
>> 0.0001 travel per minute means system will have 1.8 degree per minute.
>> My system generate 8192 pulses per quadrate so 4 times 8192 =32768pulses
>> per 360 degree of revolution.
>> So, if I divide 32768 by 360 I will have pulses per 1 degree of
>> revolution, = 91 pulse per degree.
>> For 1.8 degree per minute I will have 1.8x91= 163.84 pulses per minute.
>> Finally, in the case of feed 0.0001 inch per minute I will have 163.84
>> pulses per minute.
>> Per second it will be 163.84/60 = 2.731 pulses per second.
>> So, is this enough pulses?
>
> Enough for what? At that slow rate (with n o dynamic load) the servo
> system
> will basically step one count at a time at the 2.7 Hz rate but each step
> will
> only advance 600 nano inches, Are your mechanics good enough that this
> matters?
>
> Even with a variable load +-10 counts should be easy, this is only +- 6
> micro inches...
>
>
> Peter Wallace
> Mesa Electronics
>
> (\__/)
> (='.'=) This is Bunny. Copy and paste bunny into your
> (")_(") signature to help him gain world domination.
>
>
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