A try fixing the other head

While I had tools out, I thought I’d take a crack on the FDM 2000 head. It had a big puddle of melted model material over the inlet buffer that need to get cleanned up.

I started like I did with the FDM 1650 head

A little different
A little different

The head is a little different, with only one pair of drive rollers for each filament. The guide tube has been extended to reach the eatra distance (and seems to collect crud inside too). There’s the two outside capscrews that hold the block down. One screw is long, and the other short.

BIG Puddle
BIG Puddle

I knew I was going to need room so I pulled the other out too.

Making Room
Making Room

It was only half the work as one screw wasn’t there!

One short one missing
One short one missing

The material is a silver-grey, and not as nice as the tan polyimide. Also, when I started using the hot-knife to clear material I found it had a lower melting point too.

A little cleared away
A little cleared away

 

Getting closer
Getting closer

I think they were using the ABS+ model material, as this was a lot tougher to remove than the ABS Breakaway Support.

As I got further along, I found I didn’t have some Mini-Torx drivers that are needed for this job, and I ended up putting it back together ’til I get some. Here’s some photo’s of the guts…

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—-John

6 thoughts on “A try fixing the other head”

  1. The clog seems to be right at the inlet, maybe that part broke? (or maybe I’m getting paranoid about them) I assume you didn’t remove them because they were melded in there?

  2. The FDM 2000 head has a lot of Mini-Torx head screews that I don’t have screwdrivers for. I can’t disassemble farther until I get the tools. Also, there’s a question on how much time I want to spend on that machine as it has multiple problems, and may never run again.

    I didn’t think to much of the grey color material the inlet buffers were made of. If I try to rebuild, I’ll re-make with polyimide, which seems to be superior. I think Stratasys was cutting corners with this head.

    —-John

  3. Recently I became the owner of an FDM8000 with no head. I was wondering if you can provide a pinout of the head (I hope that the 8000 and the 2000 have the same head design). I have already managed to bypass the head and sensors to get the machine turned on and moving, and I am planning on rebuilding the head with a makerbot type head. Any help would be appreciated.
    Thanks, Lior.

    1. Hi Lior,

      I don’t have a schematic for the FDM, and I haven’t trace the wiring out (yet). But inside the head there are two steppers (one for model material & one for support material), three thermocouples (model, support, and environment), two heaters (model, support), and an interlock switch.

      The steppers wires would go to the feed on the main board.
      The thermocouple wires would go to the appropriate Watlow.
      The heater wires would go to the appropriate relay.
      The interlock would probably go to the mainboard.

      Hope that helps.

      —-John

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