Replicator 2 thermocouple replacement/upgrade comparison

[John Armbruster]

I just wanted to follow up for the forum on my failed OEM thermocouple. As I reported in a previous thread ( https://groups.google.com/forum/?hl=en&fromgroups#!searchin/makerbot/thermocouple%7Csort:relevance%7Cspell:true/makerbot/fSmBHTebeU0/r_PSxaxss9MJ ), I ordered replacements from both Makerbot and BilbyCNC ( https://www.bilbycnc.com.au/DispProd.asp?ProdID=WRMR2Thermo2 ).

First, both items came reasonably quickly. I've learned with Makerbot support, the best thing is to log into my account and generate a support ticket, then call a representative and follow up directly on the ticket. Both times I've done this, parts shipped the next business day. Both parts were ordered the same day, Makerbot's cam Saturday, BilbyCNC arrived today (from Australia!).

Second, the Bilby upgrade is a nice unit, exactly as advertised, and with two pages of instructions. Quite pricey, though, especially with the added international shipping. But no surprises.

What surprised me was the Makerbot replacement.  Free replacement with free shipping, after explaining the heater errors. But, as you can see in the picture, the wire is a huge upgrade from my failed OEM part. What I can't tell is what potting compound may be used, and whether it is comparable to the Bilby unit. Obviously, though, Makerbot has realized at least some of the problems in the OEM part.

My question now is, after seeing how poorly constructed the original part was, how much of a difference in temperature reading might be expected in these two new thermocouples? I suspect I may have to adjust future temperature settings down a bit.

What I will say is, my thoughts on "fixing" the original part are now pretty much over. I don't see any reason anyone would want to patch together, even temporarily, the thermocouple when a better replacement is available at worst after a few days shipping. 

[John Armbruster]

Sorry, just to be clear, the Makerbot replacement is the more tightly wound unit inside the Bilby unit.

Also, it would be nice if Makerbot included printed instructions with their parts. Neither this, nor the X-axis cable replacement, had any info on how to install the parts. 

[Dan Newman]

When MBI sent me a replacement t/c for my Rep 2, they also sent me a URL for
a PDF for doing the replacement,

http://support.makerbot.com/attachments/token/usfd3znngig5ylv/?name=Replicator2ThermocoupleReplacement.pdf

That was back in May of 2013. That document may have been updated since then and a new
URL generated for the updated document.

Dan

[John Armbruster]

I stand corrected. I went back to their support email and yes, they did include a .pdf download with written instructions. 

[3DwannaB]

The instructions ignore the fact that the t/c is permanently attached to the cabling. Removal without cutting the cabling of the old is impossible. Only other way is to ignore the useless instructions... disconnect from mighty board, pull the cable out of through the cable tube to the extruder, wind it up in a loop then rotate the t/c out of the cool block with the cable in a loop. CLEAR instructions would state this. Also, installation of the new t/c has to be done reverse with the cable in your way. Most MBI instructions are like this... worthless!

[BruceA]

You will find that Bilby's instructions are very concise, as well as it being a far better unit. Fortunately Lee Bilby looks after her Australian customers very well, never had to wait more than a day for a part, which is more than can be said for MBI, they may, if you push send you a free replacement for a failed unit but their postage cost is outrageous!  

[Wingcommander]

I replaced my stock T/C which I had repaired a few times, with the BilbyCNC OEM unit you ordered. I use all the same print settings as before. I have not noticed any differences in print temperatures. I print most PLA at 230c, ABS at 225C and Nylon at 255C.