1064 - PhidgetMotorControl HC

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charlatan154

1064 - PhidgetMotorControl HC

Postby charlatan154 » Thu Sep 23, 2010 1:51 am

Hi, i have a problem with my 1064 - PhidgetMotorControl HC. I have connect 2 same dc motors but when i try to move them both at the same time (using AS3), the one start earlier than the other. Can someboby help me with this? Thanks!

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Patrick
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Re: 1064 - PhidgetMotorControl HC

Postby Patrick » Thu Sep 23, 2010 9:34 am

It's a bug in the firmware - send an e-mail to support@phidgets.com and we can arrange for an exchange.

-Patrick

didier.bravo

Re: 1064 - PhidgetMotorControl HC

Postby didier.bravo » Thu Apr 14, 2011 9:07 am

not sure if i understand this correctly. this means that using the motor control HC will not work to move two motors at the same time???

I'm trying to achieve that and now i'm not sure if i'll be able to do it. do you have any example? i'm using C#

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Patrick
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Re: 1064 - PhidgetMotorControl HC

Postby Patrick » Fri Apr 15, 2011 9:22 am

The bug was in 1064 versions 100 and 101 - if you have version 102, then it has been fixed. To check this, attach your 1064 and look at the Phidget Control Panel - the version on the sticker on the bottom of the board may still read 101, even if the 1064 has been reprogrammed with 102 firmware.

The bug is mostly noticeable at low accelerations - one motor will not start to move until the first motor has reached maximum velocity.

-Patrick

didier.bravo

Re: 1064 - PhidgetMotorControl HC

Postby didier.bravo » Fri Apr 15, 2011 9:39 am

moving motors with the motorcontroller is the same as using the servos??? meaning that we cannot move the motors at the same time but positioning one after the other will be enough to start them?

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Patrick
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Re: 1064 - PhidgetMotorControl HC

Postby Patrick » Fri Apr 15, 2011 11:11 am

If both motors are at velocity 0 and you set both to go to a set velocity, the second motor that you set will not start moving until the first has reached that velocity - but you can definitely have two motors moving at the same time, as this only happens when the motor velocity is changing (at the rate of acceleration).

At high acceleration, you won't notice because the amount of time that the motors spend changing from one velocity to another is minimal - but if you use low acceleration, where is can take seconds to change from velocity 0 to velocity 100, then you'll notice.

If you do have an affected 1064 and would like it replaces, just contact support@phidgets.com.

-Patrick

didier.bravo

Re: 1064 - PhidgetMotorControl HC

Postby didier.bravo » Fri Apr 15, 2011 11:29 am

but that delay is on firmware version 100 and 101, if I have 102 should work fine, right?

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Patrick
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Re: 1064 - PhidgetMotorControl HC

Postby Patrick » Fri Apr 15, 2011 11:36 am

right

-Patrick


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