Campagnolo EPS question

Discuss light weight issues concerning road bikes & parts.
Post Reply
wilwil
Posts: 132
Joined: Thu Sep 23, 2010 5:47 pm

by wilwil

Ive just heard that the two mechs are hard wired and if the wires get damaged the whole mech needs replacing. Whereas with Di2 Shimano uses plug in wiring. This sounds like questionable design but is it a problem in real life?

Butcher
Shop Owner
Posts: 821
Joined: Sun Jan 03, 2010 4:58 am

by Butcher

EPS has connectors that should be handled with care. If you that kind of person, the system is fine. If you are like a bull in a china shop, then it's not for you. In reality, the system rarely would need to be disconnected.

My biggest issue with EPS is the charger. The connector is just too small and with my eyes, it's hard to locate the connector properly. Again, you just cannot jamb the connector and hope it's located properly.

I have no experience with Shimano's system.

by Weenie


User avatar
corky
Posts: 1149
Joined: Thu Jul 06, 2006 5:53 pm
Location: Expat in Washington DC

by corky

4 years of running it, I've not had any problems and that includes transferring it from one frame to another......

User avatar
Miller
Posts: 1176
Joined: Thu Sep 21, 2006 8:54 pm
Location: Reading, UK

by Miller

The wires from the mechs are heavy duty, you'd have to treat them very badly to damage them. The connectors are robust when connected but, as noted, careful orientation is important when joining them.

Campag rate their system as IP67 weather protected which is a relatively mild standard guaranteeing continued working after brief immersion in water, anyone can look up the details. I've been drenched on the bike a few times and EPS hasn't missed a beat. I think their connector design is partly driven by the need to meet this standard. Just an opinion.

graeme_f_k
Shop Owner / Manufacturer
Posts: 278
Joined: Mon May 26, 2008 12:21 pm
Location: UK
Contact:

by graeme_f_k

Butcher wrote:EPS has connectors that should be handled with care. If you that kind of person, the system is fine. If you are like a bull in a china shop, then it's not for you. In reality, the system rarely would need to be disconnected.

My biggest issue with EPS is the charger. The connector is just too small and with my eyes, it's hard to locate the connector properly. Again, you just cannot jamb the connector and hope it's located properly.

I have no experience with Shimano's system.


You are right, Miller.

IP67 includes both a dust / particulate and a water penetration element.

The connectors are watertight for up to 30 min in 0.5m of water ... not something most will ever encounter.
At the EPS launch with the Movistar team in 2011, Campagnolo used 2 Pinarellos, "moored" in a swimming pool with the EPS systems fully immersed, with the gears being operated ... I can completely honestly say, we have less than 5 documented cases of EPS in use, suffering from water incursion unless in some way damaged.

IIRC, the connectors are able to retain their integrity in something like a 7 micron particulate environment - I don't think we have *ever* seen particulate penetration outside of the lab.

For the charger connection, you can actually do the connection better in many cases by "feel" - I have a short video, made as a "quick and dirty" explanation of this on my YouTube Channel (such as it is):
https://www.youtube.com/watch?v=UMmrpm1Otc0&t=35s
A Tech-Reps work is never done ...
Head Tech, Campagnolo main UK ASC

graeme_f_k
Shop Owner / Manufacturer
Posts: 278
Joined: Mon May 26, 2008 12:21 pm
Location: UK
Contact:

by graeme_f_k

wilwil wrote:Ive just heard that the two mechs are hard wired and if the wires get damaged the whole mech needs replacing. Whereas with Di2 Shimano uses plug in wiring. This sounds like questionable design but is it a problem in real life?


The FD and the RD have a short "tail".

In the case of the FD, if the tail is damaged, yes, it's a new FD but you have to try pretty hard to damage the tail. Worst case is a spectacular chain drop but apart from that, it's hard to see how damage would occur in a properly assembled system.

In the case of the RD, if the "tail" is damaged, the actuator unit can be replaced - it's a SC only job (not one for your local Campagnolo ProShop even) as if you make a mess of it, it's an expensive mess and there are some very specific tools required to do it correctly, which even most shops don't run to - a 0.5 nm torque screwdriver, for instance. If, as someone-or-other's law dictates, your gear is not in a "helpful" gear when the damage is done, a lot of the RD has to come apart to get the actuator out and for that, a knowledge of the entrails of an EPS mech is pretty essential. There are lots of small parts that it is easy to lose (especially if you don't know they were are to start with) and none of them are routinely available as spares.

Again, though, in real life, you have to try quite hard to damage this cable section. The most common (maybe twice a year) is someone trapping the cable under the head of the rear QR.

The long cables attached permanently to the Power Unit are all internal to the frame so though they are the most vulnerable because of their length, once correctly installed, they are pretty safe from mechanical damage.

The interface cables are probably the most vulnerable - the one from the IF to the PU is OK, it has a connector inside the frame and again, with correct assembly, it's hard to see how it might be damaged. The two cables to either shifter, though, need correct routing and when doing jobs like re-fitting the bars to the stem after traveling with the bike in a bike bag, for instance, you need to check you haven't trapped either or both under the stem face-plate. We get a small number of those each year. Don't remove your 'bar tape with a blade and ensure that the cables run on the inner curve of the bar, that you leave a short loop under the bar tape and that you run the cables through the channel on the upper rear of the lever & through the cable trap in the lever body before plugging up and closing off the door into the lever. These precautions will protect the cable from damage when the levers are struck from the top or side, or if you crash and slide down the road, shaving the bar tape off the upper curve of the 'bars. In this respect, the advice given by both Shimano and Campagnolo is broadly similar, the mechanisms differ a little, that is all.

I have never seen (as I have with Shimano) a cable connection jerked out by a crash or hitting a pothole with the front wheel when riding on the hoods, due to the lever moving, nor problems with connectivity resulting from frequent opening and closing of the connectors (can happen with the Shimano Battery to Junction Box "A" lead).

As in most things in engineering, there are many ways to get to the same end-point. In this case, Campagnolo chose a simple wiring loom, thermally sealed in to most of the components, to remove the risk of water penetration (those who know a bit about the history of early experimental versions of EPS will know why), where Shimano went for a more complicated loom with more connectors but in their view, greater flexibility, making it possible to add extra shift options, for instance.

Campagnolo have software in two places only, which will always work at least as well as the oldest piece of software - Shimano chose a more complex path with Software in all 6 elecronic parts of the system, which broadly, need to match for version for the system to behave completely correctly ... again, a choice. Proof that TIAMTOWTDI (There Is Always More Than One Way To Do It) ...
A Tech-Reps work is never done ...
Head Tech, Campagnolo main UK ASC

ntb1001
Posts: 78
Joined: Tue Sep 16, 2014 4:38 pm

by ntb1001

graeme_f_k wrote:
Butcher wrote:EPS has connectors that should be handled with care. If you that kind of person, the system is fine. If you are like a bull in a china shop, then it's not for you. In reality, the system rarely would need to be disconnected.

My biggest issue with EPS is the charger. The connector is just too small and with my eyes, it's hard to locate the connector properly. Again, you just cannot jamb the connector and hope it's located properly.

I have no experience with Shimano's system.


You are right, Miller.

IP67 includes both a dust / particulate and a water penetration element.

The connectors are watertight for up to 30 min in 0.5m of water ... not something most will ever encounter.
At the EPS launch with the Movistar team in 2011, Campagnolo used 2 Pinarellos, "moored" in a swimming pool with the EPS systems fully immersed, with the gears being operated ... I can completely honestly say, we have less than 5 documented cases of EPS in use, suffering from water incursion unless in some way damaged.

IIRC, the connectors are able to retain their integrity in something like a 7 micron particulate environment - I don't think we have *ever* seen particulate penetration outside of the lab.

For the charger connection, you can actually do the connection better in many cases by "feel" - I have a short video, made as a "quick and dirty" explanation of this on my YouTube Channel (such as it is):
https://www.youtube.com/watch?v=UMmrpm1Otc0&t=35s
This is true....i can't see the charging connector without reading glasses, but can feel when you have it.

Sent from my SM-G935W8 using Tapatalk

Geoff
Posts: 5015
Joined: Sat Dec 13, 2003 2:25 am
Location: Canada

by Geoff

+1, there is no problem with plugging-in the charger. My son can do it in the dark, and he's 9. Is the Shimano plug-in fixture better? Ok, yeah, sure. EPS is still a really nice system, though.

To answer the OP's question, I think you will be fine. To experience solely the kind of damage that you are contemplating, it would be an odd crash indeed. You would be more likely to trash the whole derailleur to shear-off the cable, if not the dropout or rear triangle, too. A Di2 derailleur would likely be damaged in a shearing crash like that, too.

markyboy
Posts: 627
Joined: Wed Dec 29, 2010 10:22 pm
Location: Bristol uk

by markyboy

As others have said charger port is better by feel than trying to see it.
COLNAGO C60 SUPER RECORD EPS
Pinarello f8 sram etap
Eddy merckx 69 ultegra disc winter bike

by Weenie


graeme_f_k
Shop Owner / Manufacturer
Posts: 278
Joined: Mon May 26, 2008 12:21 pm
Location: UK
Contact:

by graeme_f_k

wilwil wrote:
Mon Sep 11, 2017 4:14 pm
Ive just heard that the two mechs are hard wired and if the wires get damaged the whole mech needs replacing. Whereas with Di2 Shimano uses plug in wiring. This sounds like questionable design but is it a problem in real life?
I know this an old thread now but it might also be worth saying that even in the event of damage to the RD cable, the actuator unit can be replaced by a Service Centre, which is roughly 2/3 the cost of a whole new RD (depending on model).
A Tech-Reps work is never done ...
Head Tech, Campagnolo main UK ASC

Post Reply
  • Similar Topics
    Replies
    Views
    Last post