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MERG Stepper Motor Turntable


RAY NORWOOD

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As a member of MERG. I have been looking at the MERG Stepper Motor Turntable Operation for long time. after reading through the forum, I decided to have ago.

I ordered the pre programmed PIC and the PCB from MERG, and the components from RS Online and Rapid.

I made a start on the PCB putting the components on that was not to bad as in the component list there is a list of numbers and that correspond to the PCB.

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I have not put in the IC's until I have done the first test.

This the back of the PCB showing the soldered components.

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I am still waiting for some compasitors to come, but when I get come I will put them on the PCB then fingers X'st test the board to if all is ok, then I will put IC's in.

Then I turned to the control hand set, there is no instructions on how to build the box as it is to your own preference but there is a wiring diagram that you can go by.

The box I got from Maplins, I had to plan out were I was going to put the components, the 16way hex switch (the postion switch)I soldered to a peace of stripboard and drilled the hole for the shaft to go through the I attached to the box, then I drilled the holes for the switch (haed and tail) /push button (run/stop) and the LED, as you can see on the stripboard I had to cut the copper strip to isolate the two soldered joints,

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Here is what it looks like inside the box.

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The H and the T is for the head of the bridge or the tail of the bridge to go to the place you wish to go to.

 

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The top end of the box I drilled two holes for the wires from the PCB to go into the box and soldered to the stripboard make a note of what colours go were, the other end of the wires, I have put the socket pins on the wires then put the right colours in the right place in the plastic housing so each wire corresponds to the right pin. I used CAT5 cable complete with plugs on each end, I found it cheaper then buying the cable by the metre.

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Here is some pictures of the finished hand set.

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Some pictures of the Stepper Motor and gearbox

 

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This is as far as I have got for the moment. I will try and take a video of the operation when complete

 

Wednesday 20/08/2014.

 

I got the capacitors yesterday and soldered them in this morning, I then connected to a 15v transformer and done the test and the test went first class know I was able to put the IC's in there sockets plugged in the two plugs from the hand controller and the stepper motor and all is first class IT WORKS, I am a very happy chappy.

I have done a video and have uploaded onto You Tube. Click on the link below to see the video.

 

 

 

 

 

 

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Hi Ray; to carry on with the entry click on the black Options button and select Edit Entry.

 

Cheers, Andy

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Hi Ray; to carry on with the entry click on the black Options button and select Edit Entry.

 

Cheers, Andy

Thanks Andy I sust it out thank you for your trouble.
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Hello Ray

 

With regards to the 7812 regulator U1 you have it fitted the wrong way round, according to the pcb legend the metal tab is towards the inside of the board.

 

when fitted correctly you should find that the heatsink aligns with the pcb legend

 

Regards

Geoff Cook

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