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The ERO style is a modular encoder for fitting direct to a shaft, The cat. I have only shows the 1100, 1200,1300 or 1400 series. Two of these have a 10 pin connector and they are both different.
Al.
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Does anyone know the pinout info or wire colors to this encoder?
I think this a Heidenhain ero 120 but I'm not sure the only number on it is 22196403
It was on a SEM motor on a Bridgeport sx15.
I need the pinouts or colors to the 10 pin plug on the encoder board itself.
Appreciate any help.
The ERO style is a modular encoder for fitting direct to a shaft, The cat. I have only shows the 1100, 1200,1300 or 1400 series. Two of these have a 10 pin connector and they are both different.
Al.
CNC, Mechatronics Integration and Custom Machine Design (Skype Avail).
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Idealchip,
Did you ever find out what the pinout was for the encoder pcb connector? I have Heidenhain ERO 120's on my Bridgeport BOSS 9. I have been searching for this information for about a month, since I began an upgrde of my original retrofit to it. I have the Bridgeport Maintenance Manual and it lists the pinouts from the big round "mil" connector on the side of the servo. It also lists the wire colors running from the back side of that connector to the connector inside the encoder on the pcb. I traced them all out with a continuaity tester and the BP docs were accurate. The problem is that the docs from Bridgeport lists the Index (-) signal {read index minus or inverse} twice and no Index + signal. Just a typo I am guessing. I got in touch with the people at Heidenhain and they supplied me with a schematic of the encoder board in pdf format with the pin assignments written in with a pen. The problem with that however was that it dissagreed with the BP docs for all of the other signals (A+,A-,B+, etc). I would really like to figure this whole thing out. I did a retrofit to the mill about 4 years ago and cut the ends off the encoder cables a long time ago in the process of that retrofit. So the schematics in the BP docs don't help, I have no way to figure what wire is what without the original connectors. If any one can shed some light on this for me I will be most appreciative. I have asked in so many places (Bridgeport/Hardinge Machine, Heidenhain, etc.) and not gotten anywhere. Thanks again for your time.
Look up one of the chip's data sheet (like say it was an lm358 or something) and that will tell you which of the 10 pins are power and ground by doing a continuity test. Then if you have an oscilloscope, pretty easy to figure out A-,A+, B-,B+, Z-,Z+
Hmm, that would only be 8 pins. Possibly they have more than 1 ground...
KTP,
Thank you for the quick reply. Sadly I have no ociliscope. I need to get one but it is not in the budget right now. The power and ground wires are about the only ones that agreed in the 2 sets of docs (BP and Heidenhain) and they were pretty easy to figure out previously from the connectors and such. Also, the chips are pretty hard to read. Most of the lettering and numbers are either covered in dust or flaked away. Pretty amazing actually that these units work considering the dust that was inside them. The machine was used to cut mostly orange phenolic before I bought it. That dust was horrendous. Ruined most of the bearing in the spindle and doen not want to come off easy. I am affraid if I tried to get it off the chips I would break them. They have been in the machine for about 24 years and who knows how long before that they were made.
Thanks for the suggestions though. If nothing else it give me more ammo to convinve my wife to let me buy a good ociliscope.
-Rob
Check ebay for really really cheap oscopes..you can get a good 60mhz unit for under $50 nowadays...practically costs more to ship em.
Ok, so how about an LED and a resistor? Ideally 2 leds and 2 resistors.
Take a 1k resistor and an led. Connect the resistor to the anode of the LED. Then connect the other leg of the resistor to what you think A+ is and connect the cathode to ground. Do the same for B+ with another resistor/LED. As you slowly rotate the shaft, they should alternately light up. If they don't, you just figured out where A- and B- are :-) Or perhaps that was Z+ or Z-...you may need to try a few alternatives to find the signals...but pretty safe as long as you use a resistor in series with the LED to limit the current. Oh, this assumed you had provided 5V and ground to the pins you already determined were power and ground.
Did I mention scopes on ebay are like $50?
Heidenhain encoders often have extra features like 2 (±) outputs named sensor for fault detection.
I have the pin out of the 10 pin connector for the ROD versions, they may be the same?
Al.
CNC, Mechatronics Integration and Custom Machine Design (Skype Avail).
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
KTP,
Yes, I beleive you did mention o-scopes were around $50 on eBay.
The whole LED thing sounds like a good little project and one I would have gladly undertaken during the learning curve of my first retrofit. But I am at the stage now that I just want to get it working right and don'twant to take the time to do a project just for the experience. Thanks for helping me to step back a little and put it all into a better perspective.
Al_The_Man,
Yes, the Heidenhain supplied schematic listed those signals in the hand written in ink note on it. I emailed and asked about them as I had only 8 out of 10 positions used on my pcb connector and they listed 10 signals. They gentleman that responded said they were optional on the units like mine and many did not have them.
Go ahead and post the pinout you have for the ROD version. It can't hurt to check it out and compare. The more info the better I always say. Thanks.
-Rob
The pinout of the PCB 10 pin connector on the ROD 420 is looking into the pins:
bottom row from right to left
/A /B /Z sense0v Com0v
top row R to L
A B Z Sense+ +5dc
As I think someone mentioned, you can confirm the +5 and Common by checking continuity with the IC +5 & Com pins
Al.
Last edited by Al_The_Man; 07-17-2006 at 10:05 AM.
CNC, Mechatronics Integration and Custom Machine Design (Skype Avail).
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.
Al_The_Man
Thank you for posting that. It is too hot here right now to spend much time crawling on the machine in the shop. But latter on when it cools off I will do some checking. Thanks again for the help.
-Rob
SOME of the Heidenhein encoders used on SEM motors in Bridgeport machines were custom made specials. If you call SEM, they refer you to Bridgeport. If you call Heidenhein, they do the same.
Don't call Bridgeport, they're clueless since Hardinge took them over. Might try EMI. They are the guys who did the CNC stuff for BPT as BPT employees back in those days.
Try Clarkson in Illinois. They are the SEM motor agent in the USA. They might be able to help. We learned an expen$ive lesson about Heidenhein encoders used in SEM motors during recent mill servicing effort.
You might be better off simply replacing the encoders. From what I was told, the Heidenhein encoders used in some OEM machines aren't quite as robust as if you bought the high dollar service stuff they sell as "Heidenhein".
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