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Author Topic: Denford Orac 8 station turret  (Read 25698 times)

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Offline berty

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Re: Denford Orac 8 station turret
« Reply #50 on: March 14, 2011, 12:20:09 PM »
Hi Hood
Silly old me  I was so concertrated on the 12/24v supply swapping that I overlooked that the relay also has to swap the return wire and that I forgot to ad one to the circuit board

Bert

Offline berty

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Re: Denford Orac 8 station turret
« Reply #51 on: March 16, 2011, 06:39:51 PM »
Hi Hood
I have now got my power supply sorted out although it is a bit bigger in size then I would like but OK for bench testing

I gave up with the two outputs from the original transformer and used the 24vdc output and took a spur of it and regulated that down to 12dc for the reverse

Have had tool post running under relay control using a 5v battery to trip relay all seems well

I plan to get a wall wart type of power supply for it obviously 24vdc output

The current draw in forward 24v speed is 0.14 amps and when reversing but not stalled it is also 0.14 amps, when it reaches it's stop point and stall's the motor to hold its position against the ratchet it draws 0.36 amps.


Do you recon a 0.500 amp supply would be OK

bert

 

Offline Hood

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Re: Denford Orac 8 station turret
« Reply #52 on: March 16, 2011, 06:42:58 PM »
Sounds like it should be but I am not an electrical guy ;)
Hood

Offline berty

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Re: Denford Orac 8 station turret
« Reply #53 on: March 16, 2011, 06:47:47 PM »
Me neither
I was kind of hopping with fingers crossed for a different reply  ;D
More like yes that's exactly what you need

« Last Edit: March 16, 2011, 06:50:52 PM by berty »

Offline Hood

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Re: Denford Orac 8 station turret
« Reply #54 on: March 16, 2011, 06:49:44 PM »
;D

Offline berty

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Re: Denford Orac 8 station turret
« Reply #55 on: March 16, 2011, 06:53:15 PM »
As I am of to bed now maybee some kind hearted sole will post and tell if I am wrong whilst I am in land of nod

Offline Hood

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Re: Denford Orac 8 station turret
« Reply #56 on: March 16, 2011, 06:55:57 PM »
Well if you have measured the currents then I dont see why it wouldnt be sufficient but as you say hopefully someone will come along and give you a definitive answer.
Hood

Offline berty

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Re: Denford Orac 8 station turret
« Reply #57 on: March 18, 2011, 02:47:21 PM »
Got a 24vdc 0.5amp unregulated wall wart

It out puts 32v with no load gives good forward speed though

When regulated down to 12v it does not give out enough power to move it properly at a reduced speed,  struggles like hell and stalls before reaching ratchet stop

Finally regulator overheated and burnt its self out

Got hold of a second wall wart rated at 12vdc

Now using both system works (how long it will hold out when stalled I don't know)

bert



Re: Denford Orac 8 station turret
« Reply #58 on: March 18, 2011, 03:32:35 PM »
have a nose at the ratchet assembly, and grease it well.

Offline berty

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Re: Denford Orac 8 station turret
« Reply #59 on: March 18, 2011, 04:38:36 PM »
Many thanks for that  angle tech
I will have to locate it as I don't know where it is or how to get to it
bert