Scott

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Scott
@CrazyHamSales
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April 2015

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Printer Guide Reviewer 2017

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5 days 6 hours ago - Commented on Makerbot Replicator 2/2X MightyBoards! Rev H

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Is it just the connectors that are bad or?  If you can send me a picture of it i can see if i have or can get parts for it.

5 days 18 hours ago - Commented on Makerbot Replicator 2/2X MightyBoards! Rev H

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I havent had my hands on one yet, but i certainly could try, from what i can see from pictures online they aren't much different then the original FlashForge boards that i have worked on.

 

Whats wrong with the one you have?

6 days 17 hours ago - Commented on Replicator 2X Heated Build Platform

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I highly recommend that upgrade from IDE.  I was looking at their products recently then came across a Rep2X for sale that had their complete Z-Axis replacement and HBP upgrade.  FANTASTIC... Rock solid Z-Axis, leveled it once and printed for days without any movement whatsoever.  The glass build plate that comes off with the magnets is very handy, i got two glass beds with my printer so once a print is done i just swap the build plate and start the next print on the second plate while the first one cools, makes for really quick printing being able to swap the plates.  The only improvement i could make was putting a sheet of PEI on the glass plates, i print primarily in ABS, so with the PEI and the rock solid Z-Axis i never have to level or clean and prep the bed anymore.

6 days 17 hours ago - Posted a new Thread

Without Botsteps
FOR SALE!! Makerbot MightyBoard Rev H for the Replicator 2/2xThis board has been fully tested as working, drop in replacement. Note:  I have been getting some questions on these, if you have a Rev G board you CAN swap with a Rev H board, HOWEVER, the difference is the power connector.  The Rev G board has a female socket and the plug is a male, on the Rev H the socket is the male and the power ada

1 week 1 day ago - Commented on Lost Makerbot Original Computer Software!

1 week 2 days ago - Commented on Replicator 2 blower fan not spinning

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Oh one more thing i forgot.. The Blower Fan MOSFET is Q7, its right above the print cooling fan connector, and you will see on the board near it they also silk-screened fan-cool by it.

 

Its tricky, if you do it with just a soldering iron your going to have to have a fine tipped and really sharp set of nippers, cut the legs at the body of the part and try to get that out of the way, then just take your soldering iron and remove the bit of leg left on each pad.  A little liquid flux helps to get things flowing, then just tin the pads with some fresh solder and with a tweezers hold the new one in place, i like to tack down the single leg first, then do the other two on the other side.  

 

If you have access to a hot air station, which is how i do them, you have to be REALLY careful with your airflow, otherwise you will just lay waste to the surrounding components and blow em right off.  I can set the airflow on my station down to the point that there is barely air movement, set it to about 425C, and its a quick heat and pluck with a tweezers without disturbing anything else nearby, when i put the new part on i generally use an iron instead of hot air flowing the replacement on, i feel i can get a better placement because the tweezers in the way of the air gun makes for a fiddly install with parts this small, i can do em a lot quicker and cleaner with an iron and a really fine chisel tip, 1.2mm chisel tip Hakko does them as fast as you can touch each pad.

 

 

1 week 2 days ago - Commented on Replicator 2 blower fan not spinning

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The blower fan on the side i can't find my notes, but its a hard fan to find other then online as its a 24v blower, everything you will find locally in computer shops and electronics stores in that size and shape are 12v which won't work.  The only source of 3d printer parts specifically i know of off hand that has them in stock, both as bare wires and as one with a plug pre-installed on the fan wires, is fargo3dprinting, but prepare for sticker shock, it think its like $18 and $24 for the two options.

 

Your other choice is eBay, you just have to know what to search for, i don't have my notes in front of me but if i recall correctly its a 24v 5015 Blower Fan, 50mm diameter on the vane and 15mm thick, the other important part is i believe the screw holes are 60mm apart.  I would measure to double check my memory there, but that should be right.

 

A quick search on ebay for 24v 5015 Blower Fan and filtered to US Only i was able to find some in the $6-7 range, even one seller that had two fans for $8 with free shipping, so if your ok with chopping the wires off your old fan to salvage the plug and splicing them onto a new fan its a lot cheaper, just solder the wires and use a little heatshrink, thats what i do for the 2 and 2x when replacing fans and heaters.

 

Its crazy that some will pay the $40 for a Rep 2x heater with the plug installed on them, those 24v 40w heater are a few bucks!!  Even if i bought the connector shells and pins from Digi-Key and did it that way i could have a heater for less then $5.

 

 

1 week 2 days ago - Commented on Replicator 2 blower fan not spinning

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If the fan isn't running and you sure its set to run then it could be the MightyBoard MOSFET died, the side blower uses the same FET that the extruder fan does and its just as prone to failure.  I've replaced so many of these MOSFET's that i nearly went crazy looking through the magnifier doing them.  18 Mightyboard repaired in three days... Whew...

 

The only way to for sure test this is to check the fan output with a voltmeter when it should be on and see if its switching it or not.  The MOSFET's switches the negative connection, so the positive pin will always have 24v, but the negative pin will not be connected to ground.  So if you put a voltmeter across the positive wire and another ground you will show voltage, thats what gets a lot of people tripped up on these, they think since there is 24v at the fan positive wire it should be fine, but then they check across the fan wires and no voltage.

 

 

3 weeks 1 day ago - Commented on Using two stepper motors on one extruder

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The fan shouldn't be running when the extruder is cold, below 50C, otherwise yes the fan does run the entire time the extruder is above 50C.  So if your fan is off when your extruder is cooled down below 50C then its fine, if the fan is always on even when the extruder is cold then its not right, usually a failed fan MOSFET, but thats not very common on the Rep 1, its a big problem on the Rep 2 and 2x, i've replaced a bunch of them on the Rev G and Rev H mightyboards but the Rev E in the older Rep 1 and its clones from CTC, Wanhao, and Flashforge are usually pretty tough to kill.

 

I have retraction set to 2mm and retraction speed to 50 mm/s, its been a good balance of just taking the pressure off the filament to reduce oozing, i can get a bit of a hair coming off sometimes where it does a retraction but it's a much more reliable print overall.

 

The temp on the display is the temp of the heater block where the thermocouple is attached, there is some slight variance because as the plastic goes through the nozzle it will drop its temp a bit and then the heater should come on to recover, kind of like putting a pan of cold water on the stove, you added thermal mass that has to be heated up.  I would replace the insulation and wrap it well, dont be freaked by the smoke and smell you will get when cooking off a fresh install of insulation, thats totally normal and will disappear after a bit.  Also another tip on the Rep 1, there is a gap between the mounting block and the front of the extruder carriage below the heatsinks, this allows some of the air traveling over the heatsinks to blow down and affect the print and the heater temp.  I made a thin piece that you slide in under the fans to close that air gap and keep the exhausted air going up and away from the heaters.  I will attach the STL file, its just a simple flat piece, if you didnt want to print it you could also make it with a thin piece of plastic or aluminum, but printing it and just sliding it in there has solved all my temp stability issues.

 

 

3 weeks 2 days ago - Commented on Makerbot Replicator 2 - control panel direction buttons not working

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Your welcome.  If you ever want your old interface looked at for repair let me know, i fix these.  Its generally a reasonable repair, $20-$30 depending on which parts are bad plus shipping.  I've been fixing display boards and mightyboards since the Rep 1, currently working my way through another 20 Rep 2X Rev H boards to resell.

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