On Tue, 20 Sep 2011, Andrew wrote:
> Date: Tue, 20 Sep 2011 19:38:08 +0300
> From: Andrew <[email protected]>
> Reply-To: "Enhanced Machine Controller (EMC)"
> <[email protected]>
> To: "Enhanced Machine Controller (EMC)" <[email protected]>
> Subject: Re: [Emc-users] Variable axes acceleration
>
> 2011/9/20 Dave <[email protected]>
>
>> On 9/20/2011 11:34 AM, Andrew wrote:
>>> It looks like lack of capacity at
>>> higher speed.
>> You may be simply running out of servo power
>>
>
> I've thought about it already, thanks. That's what I intend to try -
> increase supply power.
>
>
>> Servos oftentimes have some reserve power that you can use for a short
>> period of time, but that is limited.
>>
>> If your drive power supply is undersized, that will also limit max servo
>> power.
>>
>> I don't know what kind of overload your drive is indicating
>
>
> It just stops and shows something like "Overvoltage" when connected to PC.
Hmm, Overvoltage sounds like you have a problem during decelleration.
Do your drives have a brake circuit? If so is it enabled (brake resistor
installed and brake voltage set?)
If this is due to regeneration during decceleration, any of these will help:
1. Get a brake circuit working (best)
2. Put a (much) larger output capacitor on your power supply
3. Lower your power supply voltage so you have more margin for voltage rise
when deccelerating (this will limit your maximum velocity however)
>
>
>> sometimes you can adjust the current limits on servo drives
>> and get more peak power out of them. The default settings are
>> oftentimes quite conservative.
>
>
> If I only knew how few settings those DMM servos have... Though, even now I
> think that at the moment it was the only option to purchase 6 identical
> cheap motors.
>
> Andrew
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Peter Wallace
Mesa Electronics
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All the data continuously generated in your IT infrastructure contains a
definitive record of customers, application performance, security
threats, fraudulent activity and more. Splunk takes this data and makes
sense of it. Business sense. IT sense. Common sense.
http://p.sf.net/sfu/splunk-d2dcopy1
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