Info needed for these servos

[Splint]

Hi,
I bought some servo motors when I was in Singapore from a place that sells second hand industrial electronics. The guy in the shop didn't know what the motors came out of but I assumed I could just hop on the net and find what ever info I needed. I've requested information from the obvious places ie. Robbins and Myers who manufactured the motors, Electro-Craft Servo Products who took over Robbibs and Myers and Allen Bradley who took over Electro-Craft. The only information I have been able to get is from Renco who manufactured the encoders, they sent me a copy of a fax which I have attached to this post. What I need to find out is the voltage and amperage ratings for the motors and any other available information. I'm not clear on the location of the pins as described in the information sent by Renco as there is no indication on the encoder plug to show which is pin 1 and the plug is made up of 2 rows of 5 terminals.

The information on the motor is as follows:
Model Number E543
Serial Number A007898
Date Code 4188
Part Number 543-011-0740
Customer Part Number 4027126-03

Any help is better than what I have at the moment.
Regards
Splint

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[Splint]

The first part of the fax from Renco....

[Splint]

The second part of the fax from Renco....

[Al_The_Man]

Splint, I have a few of the older Electro-Craft catalogs and that number does not show up, there is an E series, they are light industrial brushless motors. Are yours DC brushless motors? Approx what physical size? With the Renco encoders, if they have a ribbon cable coming out of the encoder, the colours Renco used are usually consistant, so you could get that from the web site.
Al

[Splint]

Thanks for replying Al_The_Man,
I honestly don't know what they are, apart from a couple of bar codes there is no other information on them. There is a positive terminal on one side of the motor and a negative terminal on the other. The encoder ribbon is all blue with a red (obviously power) stripe down the middle of the ribbon, the stripe is very ambiguous, it looks to be between two wires in the ribbon, I'm not sure if that is suggesting that the wires either side of the red stripe are both power. As far as dimensions go, the overall length of the motors are 7 1/2 inches which includes the shaft which extends out 1/2 inch either end of the motor. The diameter of the motors is 2 inches and the shaft diameter looks to be 3/8 inch with a flat machined into them. I guess having no record of E series in your catalogue they may have been a custom made motor for the application they were used in.
Thanks
Splint

[Splint]

Hi Al,
I just had another thaught, quiet often model numbers are made up from technical specification catagories ie. first digit may mean servo or stepper, second may mean voltage, so on and so forth, is there any explination of part/model number determination in your catalogue?
Thanks
Splint

[Al_The_Man]

Splint, I think I have found them, I have details for DC motor E540/E542 in three versions, they are very close to what you describe, two have an actual body length of 4" and one 5" all 2" in dia.
They are all 60vdc 6000 rpm, I have all the other specs listed, my scanner went on the fritz otherwise I could have attached it. The encoders are not shown, unfortunately.
I have always had good co-operation from Renco regarding questions.
Al

[Splint]

Al_The_Man you've just made my day,
thanks very much, I was starting to think I was heading down a dead end street with these motors. If you could post the specs when you get your scanner sorted out it 'd be a big help, no rush though as the motors are about all I have toward my router.
Thanks very much.
Splint

[balsaman]

On my encoders, I open one up and the circuit board had the +,-,A,B,Z etc. printed on it where the wires were soldered on.

E

[Al_The_Man]

Splint, This is what I have, I would think that the motors you have are close to one of these.
Electro-Craft DC Motor 0504-01-031 0540-04-032 0542-03-500

Cont. stall torque (oz-in) 32 32 50
Peak Torque(oz-in) 240 240 350
Max. voltage (V) 60 60 60
Max speed (rpm) 6000 4200 6000

Mechanical

oz-in-sec2 0.0038 0.0038 0.0062
kt Torque constant 9.6 19.2 11.8
Ke Voltage Constant 7.1 14.2 8.6
Winding resistance (OHM) RA 1.23 4.98 1.04
Max pulse current (A) 24 12 29
Armature Induct. (mH) 3.0 12 3.3
Body Length(inch) 4.0 4.0 5.0
Al

The spacing did not come out right on the posting, hopefully you can decifer.

[Splint]

Al_The_Man and Balsaman thanks so much for your help.
I just took appart the encoder to see if there was any labeling on the circuit board, unfortunately there was not, but looking at the ribbon 6 of the ten wires are not used and the other four correspond with what renco sent me in the fax (pins 123 & 8) so that should be enough to get me going. Thanks again, I hope I can return the favor some day.
Splint

[Engineman]

It is late to answer the question, but today I got a data-sheet for the ElectroCraft E543 Servomotor.

It is a proprietary model for IBM, so not in the catalogues.

The most important data:

max terminal voltage 45 V
max cont speed 4000 rpm
max peak torque 180 oz-in (1,27 Nm) at 12 A
max peak current 12 A
max cont current 4,1 A
max cont stall torque 54 oz-in

Greetings from Germany

- Engineman -

[Splint]

Thanks Engineman, that's a big help.
Cheers
Splint

[guimier]

It would need information on encoder that it accompanies e543.
Apparently it marks renco
If you have this information, I will be thankful to you that me you send it

best regards

Guillermo

[Splint]

Hi Guillermo,
sorry, the only information I have at this stage is the fax from Renco which is in this thread. If I get any more information I'll post it here.

Splint

[TrinhAnhMinh]

help me!
The information on the motor is as follows:
Model Number E543
Serial Number G056926
Date Code 0893
Part Number 0547-01-009
Customer Part Number 40271-146-01

Any help is better than what I have at the moment.
Trinhanhminh

[Engineman]

This motor was specially made for IBM
by ElectroCraft
From the specifications ES0543-02-012:
max terminal voltage 45V
max cont speed 4000 (no load)
max peak torque 180 oz-in (.38 Nm)
max cont stall torque 54 oz-in
max peak current 12A
max cont current 4.1 A
max winding temp 155 C

Greetings from Germany
- Engineman/Robert -

[TrinhAnhMinh]

Thanks Engineman, that's a big help.

help me!
The information on the motor is as follows:
Model Number E543
Serial Number G056926
Date Code 0893
Part Number 0547-01-009
Customer Part Number 40271-146-01
Could you give me some more information about this?
kt Torque constant?
Ke Voltage Constant?
Winding resistance (OHM) RA ?
Max pulse current (A)?
Armature Induct. (mH)?

TrinhAnhMinh

[dazz100]

I have just purchased an Electro-craft servo model 543-011-0740 which includes the shaft encoder. It has a 10-way flat cable at one end.

Has any had any experience with these servos? I would like to know if anyone has had success using the shaft encoder. It should do 1024ppr according to the data posted previously.

I am working towards building an electronic leadscrew for my lathe.

[Splint]

Dazz100,
I had Renco encoders on my E543 servos, I was having trouble getting them to run properly with the Rutex drives and thought it was the drives as the problem appeared consistant while switching different motors to the drives. Long story short I replaced the Renco encoders with US Digital E2 units (which locate perfectly in the existing mounting holes) and bench tested the motors with excellent results. I have run into an electrical interfearence issue now that the motors are mounted on the machine and the cables are routed as a group. This is due to the fact that I'm using unshielded network cable between the line drivers and the servo drives. I am currently working through this issue trying to source some more appropriate cable to fit up. Here's the link http://www.cnczone.com/forums/showthread.php?t=50405

If you end up following the path I did then these are the details for the parts:
E2-1024-375-HG Complete encoder with 1024 Counts per revolution, fits a 3/8" shaft
CTOOL-375 Centering tool which fits over the motor shaft and centers the encoder while you tighten the mounting screws.
CA-434-1FT Wiring loom with connector which fits the E2 encoder. The loom has only one connector, check on this as they have a range of looms and there may be something more appropriate to your setup.
HEDS-9100-J00 Replacement module, allways a handy thing to have.
I think you'll find US Digital are the cheapest replacement module suitable for CNC application, there are some cheaper but shaft sizes are very limited and the encoders are known to have significant error in the signal.

The other thing to be aware of is the mounting bolt sizes for the motor itself, they're a funny Imperial size, cant recall what they are off hand but I'll try and find out for you. It might be a little tricky getting hold of some in NZ.

Cheers
Splint