Trying to find a cable?

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07 Mar 2013 05:45 #30994 by customcutter
I spent last week trying to figure out the wiring on my Enco retro-fit to CNC. My controller has 3 boards. One has the Gecko 201's mounted on it, with a 34 wire flat cable with edge of card connection. The second has an RS232 cable, and another 34 wire flat cable with edge of card connection. And the third is the main voltage board with bridge rectifier, etc. It also has the 34 wire flat cable with edge of card connection. If I can "breakout" the few wires I need for stepand direction, I can leave everything else intact, I think.

I want to replace the card with the RS232 cable and use the 5I25 and 7I76 combo. My problem is "breaking" the wires out of the 34 wire flat cable. I can't find anything on the internet that indicates a "male" plug that I can plug into the "female" edge of card socket on the flat wire cable. I've been to Radio Shack and the local Tiger Direct (Comp USA) and the tech's look at me like I'm crazy when I show them the cable. This controller was probably built in 2001-2002, and from what I've been able to find on the internet, it appears that the cables were used for floppy drives?

The cable looks like this one and if you zoom in you can see the "edge of card" feature instead of round pin holes.

www.trademoon.com/product.asp?itemid=146...7l1lucfqsynqodtuiaxq

I'm beginning to think I might just have to order a longer cable and cut out and strip the wires I need so that I can terminate them on the blocks on the 5I25/7I76 card. I need some younger eyes and steadier hands and a real sharp exacto knife.

Anyone else see any other option available? I also was wondering if someone might make a 34 pin card with terminal blocks, that I could use to "breakout" the wires I needed. I looked on the Mesa site to see if maybe they had something but didn't see anything.

thanks in advance,
Ken

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07 Mar 2013 07:17 #30996 by BigJohnT
Replied by BigJohnT on topic Trying to find a cable?
Ken,

If you can get the DC power from your power supply to the 201's power terminals ditch the rest and just run some wires from the 201's step and direction to the 7i76 card step and direction terminals.

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07 Mar 2013 08:37 #30998 by customcutter
John:

The 201's are mounted onto terminals than mount onto pins on the board. I don't think there is room to insert a wire also, along side the pin? I've also been wondering if I might possibly "wrap" the wire around the correct pins. 30+ years ago I used to install Crossbar #5 in central telephone offices. It was all 24gauge wire wrapped around a square pin for connection. Wish I still had a wire wrap tool. Everything was color coded. (blue, orange, green, brown, slate and single, pair, or triple bands, of blue, orange, green, brown, slate. And then wrapped in fabric of the same colors. Can't remember if they used to be up to 250 or 500 leads in a cable. Funny what you remember.)

If I pull the 201's off of the board and remount them to heatsinks. I'll wind up running 36+ wires instead of breaking out the 6 or 8 I need. Plus loosing all the fuses, circuits, capacitors, etc. Just trying to find a short cut if possible.

thanks,
Ken

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07 Mar 2013 08:53 #30999 by alan_3301
Replied by alan_3301 on topic Trying to find a cable?
is this what you need?
I searched google for 34 pin idc breakout board
www.winfordeng.com/products/brk2x17.php
The following user(s) said Thank You: customcutter

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07 Mar 2013 09:10 #31000 by customcutter
Alan:

I may be able to make that work. The board appears to have male round pins, instead of "edge of card". I might be able to get a cable with 2 edge of card connectors on either end and a 3rd connector with female round pin connection.

I did several google searches, but did not add the "idc", and came up empty.

thanks,
Ken

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07 Mar 2013 09:21 #31001 by customcutter
Just went online and looked for a "wire wrap tool". Found that Radio Shack still carries such an item. I think first try I'll see if I can run straight to the 201 pins if I can wrap the wires properly and get good connections.

thanks
Ken

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07 Mar 2013 10:37 #31002 by alan_3301
Replied by alan_3301 on topic Trying to find a cable?
sorry I didnt catch the end of card part.

check this out.
compare.ebay.com/like/300841981656?var=l...ceItemTypes&var=sbar

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07 Mar 2013 19:57 - 07 Mar 2013 20:00 #31020 by BigJohnT
Replied by BigJohnT on topic Trying to find a cable?

John:

The 201's are mounted onto terminals than mount onto pins on the board. I don't think there is room to insert a wire also, along side the pin? I've also been wondering if I might possibly "wrap" the wire around the correct pins. 30+ years ago I used to install Crossbar #5 in central telephone offices. It was all 24gauge wire wrapped around a square pin for connection. Wish I still had a wire wrap tool. Everything was color coded. (blue, orange, green, brown, slate and single, pair, or triple bands, of blue, orange, green, brown, slate. And then wrapped in fabric of the same colors. Can't remember if they used to be up to 250 or 500 leads in a cable. Funny what you remember.)

If I pull the 201's off of the board and remount them to heatsinks. I'll wind up running 36+ wires instead of breaking out the 6 or 8 I need. Plus loosing all the fuses, circuits, capacitors, etc. Just trying to find a short cut if possible.

thanks,
Ken


If I recall correctly from a photo you posted the 201's terminals were screwed to pins on the board so you only need to loosen the screws on the terminal blocks and remove the drive? I can only count 9 wires for three 201's the two DC power wires, two for step and direction for each drive and one common. I don't see what you need circuits and capacitors for between the 7i76 and the drives. I think your over complicating this trying to retain the old circuits. What ever you do make sure the 201's are mounted to some heat sink material...

I really think your going to have trouble mixing the old circuit in between the 7i76 and the 201's the more I think about it. It should be a straight shot from the terminal block of the 7i76 to the 201 for your step and direction lines.

Just my 2 cents
John
Last edit: 07 Mar 2013 20:00 by BigJohnT.

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07 Mar 2013 21:25 #31027 by andypugh
Replied by andypugh on topic Trying to find a cable?

Alan:

I may be able to make that work. The board appears to have male round pins, instead of "edge of card".


I think that the suggestion is to plug your flat cable into that adapter card, then take discrete wires to the 7i76.

Personally I would get an IDC edge connector and some cable (or an old card-edge floppy connector) and separate the wires. It isn't all that hard to do, but is a little tedious.

A new connector and a bit of the twisted-pair cable might be easier to separate: uk.rs-online.com/web/p/twisted-ribbon-cable/1209191/

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08 Mar 2013 06:50 #31048 by customcutter
John:

Yes, I'm only trying to run wiring from the new 7I76 card to the step and dir on the 201's. The rest of the wiring I'm refering to is the 70V from the other card, and the wiring going to the steppers, and the large "surge" capacitor that was on the 201 board.

Not trying to reinvent the wheel, but hoping to use the some of the existing parts.

I've got other questions that maybe you or Andy can help me with, but I'll put up another post for those.

thanks,
Ken

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