BingLast BuildLog

[BingLast]

Almost done with the wiring on the ATI Hadron build with dual extruder. I can't seem to find any references on where to wire the extruder fans. Any suggestions?
I'm anticipating problems on the Dual extruder plate that came with the kit. Any suggestions?

[keos]

See under forum / 3D printers / ordbot. I think most people use "D9" for the fan with RAMPS.

[BingLast]

Finally put together my dual-extruder on the gantry. I used the original bracket that came with the ATI kit. I hand tapped two holes on the bracket and two aligned holes on the extruder gantry plate. I've put the extruder as close as possible. In this set-up, I will have to reverse the rotation of one of the extruder stepper motors. Hope that works. Aligning these two extruders is going to be a big challenge.

[BingLast]

See under forum / 3D printers / ordbot. I think most people use "D9" for the fan with RAMPS.

I'm still unclear about the Extruder fan connection. Since I have a dual-Extruder, D9 has been allocated for the second Extruder heater. I would assume that the extruder heater temp is controlled through D9 based through the thermistor.

[BingLast]

Tonight I was able to partially wire the two heating elements and two thermistor on to the Extruder gantry. I did not solder the thermistor leads on the wire. Inserted the thermistor leads and plastic into a sleeve and crimped it together then put it in a shrink tubing. Tested the continuity and it was open. I guess there has to be heat source for the circuit to close.

[orcinus]

Thermistors are (variable) resistors and aren't particularly suited to continuity tests. The ones used should measure a relatively high resistance at room temp (about 100kOhm at 25 deg C / 77 deg F) and progressively lower resistance as they get heated up.

Also, i'd strongly suggest you wrap the ceramic insulation edges with kapton as well as you can, or you'll eventually end up with flakes of insulation in your prints (that's from my unfortunate personal experience - i've insulated my Arcol.hu hotend and left the edges bare until i realised they shed little flakes and fuzzies).

[cvoinescu]

What is that insulation made of?

[orcinus]

Ceramic fiber.

[BingLast]

Thermistors are (variable) resistors and aren't particularly suited to continuity tests. The ones used should measure a relatively high resistance at room temp (about 100kOhm at 25 deg C / 77 deg F) and progressively lower resistance as they get heated up.

Also, i'd strongly suggest you wrap the ceramic insulation edges with kapton as well as you can, or you'll eventually end up with flakes of insulation in your prints (that's from my unfortunate personal experience - i've insulated my Arcol.hu hotend and left the edges bare until i realised they shed little flakes and fuzzies).

Thanks Mr.O. I wish I could buy kapton tape by the meter here in the Philippines. They sell it by 37 yards per spool for around $50.00

[baz]

Hi BingLast,

I have just started my build and was looking at the photos in your first post for some inspiration on my electronic set up. The main problem I am facing is what type of four pin connector to get. The wiki advises to use 4 Pin Molex micro fit connectors, however I can only source them in one place (I am from the UK) and the are pretty expensive. The other problem is that I cant seen to find a decent alternative. So, when I was looking at your photos I noticed you are using a different 4 pin connector to the ones I have seen, it looks similar to a PWM connector, is it?

Thanks,

Baz