Old electric schematic ( mengele mammut harvester) - Page 1
Forum section: electronics / general

author: zero0d
author_rank: Contributor
timestamp: March 29, 2024, 06:50:47 pm
content: Hi All,i'm trying to read old electric schematic for a harvester and have some question regarding symbols and their meaning.-> What represent the symbol designated with X1 (ws)?-> if i look at the electromagnetic valve Y2 and Y3 they booth connect to X1 pins 2 and 3 but with different wiresThank you.

author: HwAoRrDk
author_rank: Super Contributor
timestamp: March 29, 2024, 07:03:54 pm
content: If I had to guess, I would say maybe the X# represent a connector? Or perhaps a terminal block? And the "ws", "bl", "rt" are colour codes? Weiss (white), blau (blue), rot (red)?

author: ebastler
author_rank: Super Contributor
timestamp: March 29, 2024, 07:14:11 pm
content: Agree, the Xs must be something that gets plugged in. It seems that X refers not to one of the endpoints of the connection, but the connecting element itself. Wiring harness, jumper block or such?Ws, rt, bl are clearly colours, as decoded by HwAoRrDk. Very common to find these two-letter abbreviations in German schematics and wiring diagrams.EDIT: Oh, there are more colour-coded lines to the left and right of each "X". Probably those lines are the wires, with the small-print colour codes (often striped colours like bl/sw = blau/schwarz) plus a number which might designate the cross section. In that case the Xs would be some connecting elements between wires.

author: zero0d
author_rank: Contributor
timestamp: March 30, 2024, 07:44:57 am
content: thank you for the replay.yes your are correct for some statements that you made. The Schematic is in German, here is what i know-> eg. marked in green bl/gr 1.5 -> means wire color blau/grau ( blue/grey) and 1.5square wire cross-section-> eg. Y2, Y3 , Y and the symbol is the marking for a electromagnetic valve with two pins (1 and 2) , pin 2 is connected to GND with braun/brown 1.5 square wireI also thought that X1 is some kind of connector but how can the same connector have two pins numbered 2 and two pins numbered 3 , and different wires connected to same pinAn below X1 ( i think this is a designator) it says "ws" , and I'm not shore if this is color marking?If i think more maybe it is color marking, and the numbers meaning is as following: female connector pin 2 connects to male connector pin 3 -> but i'm not shoreAlso marked in purple below connectors ( if X mean connector) there a different signs, does anybody know what this is?Br,d.

author: AVGresponding
author_rank: Super Contributor
timestamp: March 30, 2024, 09:55:52 am
content: X1 is likely a wiring loom assembly, and the pins are numbered at each end, so "2" at one end connects to "3" at the other. This also implies that particular loom assembly may be reversible.The symbols under the connectors are "i" and "a", and "u" and "o". Since they are all at matching ends, it may be some sort of socket assembly identifier. As a non-German speaker, I'm unable to provide a guess as to what they might be abbreviations of (though I would have decoded the wire colours easily enough).EDIT: We might glean more useful information from a picture of the full drawing...

author: ebastler
author_rank: Super Contributor
timestamp: March 30, 2024, 11:25:11 am
content: Do you have access to the actual machine? This might be a good time to look at the real thing...

author: nightfire
author_rank: Frequent Contributor
timestamp: March 30, 2024, 12:10:35 pm
content: As a german I can confirm that in those kinds of schematics something like X1 is most likely some screw terminal block as connection point for the things after them, like buttons, sensors etc.The number after the X (in this schematic, I see X1,X13,X20,X21,X28) would be the connection terminal itself, followed by the number of the screw where the wire goes to.And also the wire colors are german stuff, like:bl=bluesw=blackgr=greygn=greenws=whitert=redbr=brownI would read this part in a way, that:From connection point X21 screw 3 goes a blue/black wire with 1.5 mm² size to Terminal block X1, Screw 2. From X1, screw 3 (here the first numbers probably are the incoming terminals, the other some lower row) there goes a white connector to the incoming connection point Screw 2. From X1 screw 3 then there is a black/white cable with 1.5 mm² that goes to Y3/screw 1.A photo of the terminal block or connector wiring panel X1 would greatly help to confirm and explain some things, though ;-)

author: zero0d
author_rank: Contributor
timestamp: March 30, 2024, 12:45:28 pm
content: Hi all,thank you for the help.to confirm the X1 is a connector and the "ws" is the color of the connector ( weiß / white).X1 connector it has the male and female part , so the pin3 of the male X1 connector connects to pin2 of female X1 connector.yes we have access to the machine, and we found the problem and fixed itBr,d.

author: joycy84
author_rank: Newbie
timestamp: April 21, 2024, 08:41:54 pm
content: Hey, Sorry to jump on a thread with a random question,Wondering where you happened to locate electrical schematics for the Mengele Mammut?Im currently working on a 7800 and trying to diagnose an issue with machine not sharpening. (motor bring in the stone, but the hydraulics dont kick in for spinnging the stone or running the drum in reverse)Machine came with very little info and manuals.Any help greatly appreciated

author: zero0d
author_rank: Contributor
timestamp: April 23, 2024, 06:38:08 pm
content: Hi,you can contact here for the manuals.https://www.uniharvest.de/english/Best Regards,d.