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Author Topic: Cold Snap & The Geckos (not a new punk band)  (Read 6906 times)

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Offline Glenn

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Cold Snap & The Geckos (not a new punk band)
« on: November 03, 2006, 02:03:04 PM »
Hi guys,
  The temperature took a dive in the shop last night, and today, my geckos won't even light up.
Everything was working fine for the last 2 months, in fact, I've been slowly turning up the rapids
from a comfortable 25ipm's to 49ipm's just to see what they will consistantly do, so did I maybe break the geckos? or
possibly just the power supply?
    The voltmeter on the output gives about 3 volts dc,should this be 24?( It is a 24vdc power supply).
   
     Gecko G201's   
     24vdc power supply
     282oz/in. motors
     
            Thanks,
     
            Glenn :)
Don't assume anything.....it'll make a Manager out of U and Me!

Hood

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Re: Cold Snap & The Geckos (not a new punk band)
« Reply #1 on: November 03, 2006, 03:18:47 PM »
If its a 24vdc power supply that is what you should get. Make sure there are no loose connections, check the ac voltage going in to the PSU and also the ac coming out of the transformer, it should be about 17vac for a 24dc power supply.
Hood

Offline Glenn

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Re: Cold Snap & The Geckos (not a new punk band)
« Reply #2 on: November 03, 2006, 04:52:16 PM »
Robin,
    Thanks for such a fast reply,
I double-checked for loose connections,all seem fine,
the ac voltage going into the psu is correct, but I don't
know how to get at the ac output from the transformer,
it is on a circuit board, and any contact points seem to be buried.
    More info...it has one green led that doesn't seem as bright
as it was before. It is lit when unit is plugged in.
    When I took the lid off, I saw a fuse, but it is in tact.
   Would bringing up the speed of my motors burn up the
psu?, or is this impossible?

                Thanks,
                 Glenn
Don't assume anything.....it'll make a Manager out of U and Me!

Hood

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Re: Cold Snap & The Geckos (not a new punk band)
« Reply #3 on: November 03, 2006, 05:10:54 PM »
Not, dont think there is any way the motor speed would burn out the psu.
Hood
Re: Cold Snap & The Geckos (not a new punk band)
« Reply #4 on: November 06, 2006, 03:21:47 PM »
It sounds like a power supply issue to me.  Maybe it is possible by increasing the acceleration (if you did) that the extra current draw to accelerate faster damaged the power supply?  Or if the shop got super cold quickly maybe expansion/contraction occurred on the circuit board and broke some component (although that's a real loooong shot). 

What is the amperage rating of the power supply and how heavy are your axis?

Offline Glenn

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Re: Cold Snap & The Geckos (not a new punk band)
« Reply #5 on: November 06, 2006, 04:10:37 PM »
Hi Marcoose,
  The amperage rating of the power supply is 4.5,
and the motors are 282oz/in, the axis weigh very
little, (sherline lathes are tiny-but should do until I
can move up to a heavier lathe)..the motors don't 
seem to bog down under motion, but the red light
on the geckos always dims when the motor is
activated. Is that an indication that the motors are
starving for more power?

                        Thanks,
                          Glenn 
 
Don't assume anything.....it'll make a Manager out of U and Me!

Hood

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Re: Cold Snap & The Geckos (not a new punk band)
« Reply #6 on: November 06, 2006, 04:19:51 PM »
Nope, my LEDs dim as well and I have plenty in reserve so I think its just normal.
Hood
Re: Cold Snap & The Geckos (not a new punk band)
« Reply #7 on: November 06, 2006, 08:00:14 PM »
take a reading at the power supply with nothing hooked up to it. it should read 24v. Then hook up each item requiring 24 v until you see the voltage drop that will be were your problem is. On a dc circirt if you get a short or your power supply is going you will lose voltage. (Dim LED lite).

Offline Chip

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Re: Cold Snap & The Geckos (not a new punk band)
« Reply #8 on: November 06, 2006, 10:08:23 PM »
Hi, Glenn

Get your Volt-meter out, on your Gecko's, Black lead on Power Gnd, Red lead on +24 to 80 volt terminal's is the 24 volts there Yes -Continue

Checking Dir and step terminal's ( Step term is harder to check depends on your Pulse's Per Step).
 
Black lead on Dir terminal , Red lead on Common terminal , jog the axis your testing one Direction, should have  0 volts, Jog the other Direction you should have at lease 3.5 to 5 volt's.

Your probilly missing eather the 24 volts or the 5 volts.

Let us now, Hope this Helps.

Thank's Chip





Offline Glenn

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Re: Cold Snap & The Geckos (not a new punk band)
« Reply #9 on: November 07, 2006, 09:28:10 PM »
Great advice gentlemen!
  I unhooked the psu from geckos to eliminate all possibilities, and hooked up the voltmeter, and  the 24volt psu
only gives 3volts dc... I'd say you guys have solved another mystery without even breaking a sweat!
  At this point, I will contact the seller of this psu, and see if it's still warrented.

                   Again, many thanks to all,
   
                       Glenn
Don't assume anything.....it'll make a Manager out of U and Me!