On Sat, 15 Oct 2011, Tom Easterday wrote:
> Date: Sat, 15 Oct 2011 15:28:19 -0400
> From: Tom Easterday <tom-...@bgp.nu>
> 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] config without encoders
>
>
> On Oct 15, 2011, at 12:48 PM, Dave wrote:
>
>> Tom,
>>
>> I'm running a couple of stepgens via a 5i20 card on one machine and it
>> is running much faster than what you are and I am not seeing overshoot
>> problems.
>>
>> I suspect your Max_accel below is lower than the accel values you have
>> set in the INI file so you are telling the stepgen to go faster than
>> what you have limited it to below.
>>
>> Try entering some large values below directly for max accel and max
>> velocity and see if your problem doesn't go away. That way the stepgen
>> will not attempt to limit the velocity of accel.
>>
>
> The values below just reference the ini. For max accel and max vel the ini
> values are:
>
> MAX_VELOCITY = 39
> MAX_ACCELERATION = 120
>
> Though we have also tried much lower values like 80 and 50 for acceleration.
>
> -Tom
>
>> Dave
Whats is the stepgen max velocity set for? This needs the 10% overhead abouve
your actual maximum speed
Peter Wallace
Mesa Electronics
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