Isaac Mendel build
Posted by jkelso
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Re: Isaac Mendel build September 07, 2010 03:46PM |
today I got my power supply from hobby king in hong kong, very timely, thank you. Also from amazon I got several electronics kits: a protoshield kit for arduino/seeduino, a megashield kit for arduino mega, a motor control kit for arduino, and a seeduino MEGA compatible board.
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Re: Isaac Mendel build September 08, 2010 10:08AM |
I saw this at the robot store and thought it was pretty kick ass
ed-210?
ed-210?
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Re: Isaac Mendel build September 08, 2010 02:09PM |
The part I needed from Fleming bros. came overnight, thank you. If that part hadn't come today I was going to finish my other self replicating machine project.
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Re: Isaac Mendel build September 08, 2010 03:29PM |
The gen 6 looks really nice. Still waiting for the tech remix kit from kimberly I got on ebay. Today hopefully. I put together the sides with the new part, everything works great. I tightened all the bolts really tight with 2 crescent wrenches. I used flat washers and here I'm wondering if it would be a good idea to use lock washers or locktite. I'm going to leave it for now, I've tightened them to the point that the washer is embedded in the plastic.
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Re: Isaac Mendel build September 08, 2010 03:47PM |
the new soldering station came in the mail. This feels very well made. Something tells me it's going to work a lot better than that one I got for 10 bucks at radio shack that one time.
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Re: Isaac Mendel build September 08, 2010 05:13PM |
thanks nophead. I'm on to step 3 of the frame assembly part on the flemingcnc website. Everything went on just fine, but the documentation doesn't state which length of rod I need to be using, only the part name. So I checked the documentation and found out what size rod that translates to. Would be nice if things were a little more straightforward.
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Re: Isaac Mendel build September 08, 2010 05:40PM |
Today I got the stepper driver boards and cables from Makerbot. Since I still don't have a confirmed shipment for the tech remix electronics I'm considering getting a bare motherboard and building my own and possibly the extruder board too. The user kimberlyandrus deleted the ebay account shortly after taking the order. It was supposed to be a 2 to 3 day express delivery and paypal says the package was shipped on the 2nd but the tracking number states that the package has not been confirmed as having been delivered to them? I'll give it another day or two maybe and call them again.
So far I have a pretty good backup plan going for the electronics. I got 5lb of plastic from them too.
Edited 1 time(s). Last edit at 09/08/2010 05:46PM by jkelso.
So far I have a pretty good backup plan going for the electronics. I got 5lb of plastic from them too.
Edited 1 time(s). Last edit at 09/08/2010 05:46PM by jkelso.
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Re: Isaac Mendel build September 08, 2010 05:52PM |
These are solid HDPE so the parts aren't going to move and will handle a LOT of pressure. We don't tighten them super tight though, and certainly not enough to embed the nut 
At that pressure I doubt they'd back out, but I don't know how elastic HDPE is either so...
The only nuts we've seen loosen up on our builds was for the x-carriage itself. You may opt to use lock nuts or lock washers on the 4 bolts that hold both halves of the carriage together. You don't want those very tight, just enough to take the play out of the bearings. The HDPE flexes a little under the pressure but you don't want to crank them down. Of course a little blue locktite is cheap, but only use a small half-drop or you might not get the parts apart
We just don't feel a lot of vibrations in the frame, I'm guessing all the vibrations in the x-carriage are dampened by the belts?
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Isaac: a CNCed Mendel Derived RepStrap
FlemingCNC
At that pressure I doubt they'd back out, but I don't know how elastic HDPE is either so...The only nuts we've seen loosen up on our builds was for the x-carriage itself. You may opt to use lock nuts or lock washers on the 4 bolts that hold both halves of the carriage together. You don't want those very tight, just enough to take the play out of the bearings. The HDPE flexes a little under the pressure but you don't want to crank them down. Of course a little blue locktite is cheap, but only use a small half-drop or you might not get the parts apart
We just don't feel a lot of vibrations in the frame, I'm guessing all the vibrations in the x-carriage are dampened by the belts?
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Isaac: a CNCed Mendel Derived RepStrap
FlemingCNC
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Re: Isaac Mendel build September 08, 2010 08:07PM |
Well I've used lock washers in all the places that bolts tighten against the frame vertexes. Maybe they should've called this model the Ra.
Edited 1 time(s). Last edit at 09/08/2010 08:09PM by jkelso.
Edited 1 time(s). Last edit at 09/08/2010 08:09PM by jkelso.
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Re: Isaac Mendel build September 08, 2010 11:20PM |
jkelso Wrote:
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> After tightening the bolts all down the frame had
> a terrible wobble between two of the corners. I
> spent about a half hour adjusting the bolts
> between the top and bottom until every corner sat
> solidly with no hint of wobble.
Don't do it that way. Some of the vertex pieces have a burr or something on them that causes that wobble... Do it by measuring. If it wobbles, buy the felt pads for the bottoms.
I am speaking from experience
.
-Steve
-------------------------------------------------------
> After tightening the bolts all down the frame had
> a terrible wobble between two of the corners. I
> spent about a half hour adjusting the bolts
> between the top and bottom until every corner sat
> solidly with no hint of wobble.
Don't do it that way. Some of the vertex pieces have a burr or something on them that causes that wobble... Do it by measuring. If it wobbles, buy the felt pads for the bottoms.
I am speaking from experience
.-Steve
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Re: Isaac Mendel build September 09, 2010 01:23PM |
I measured the distances and got the frame all stable. As I wait for the electronics kit to arrive I'm pondering the distinct possibility that I'll be soldering some of these boards together myself. I got another vital piece of kit from amazon.com, a true RMS multimeter. This looks like a nice one.
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Re: Isaac Mendel build September 09, 2010 02:07PM |
Some more goodies came today, that SAE/Metric digital caliper I've been wanting, and 1 inch kapton tape for the extruder.
Also, I got some other cool stuff off amazon today, some solar fence post lights I've been wondering about and an auto set alarm clock. weee!
Also, I got some other cool stuff off amazon today, some solar fence post lights I've been wondering about and an auto set alarm clock. weee!
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Re: Isaac Mendel build September 09, 2010 05:36PM |
On to phase 3 step 1, assembling the Z-motor and Z-tensioner. Finally, with the new caliper, I can get accurate mm measurements. This tool came right on time, allowing me to accurately place the nuts 25-26mm from the bottom of the rod. No more tape measure lol.
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Re: Isaac Mendel build September 09, 2010 06:12PM |
Step 2, mounting the bearing inside the Z motor bracket. At first I tried another clumsy way, then realized this is too difficult to do without mounting the rod into the vise. I used nylok nuts here.
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Re: Isaac Mendel build September 09, 2010 07:30PM |
Huh? I'm doing this step by step according to the flemingcnc site documentation. Wise guy.
I'm on to phase 3 step 3 now, everything is going smoothly now. I had to run up to home depot for some M6 nuts, thought I had everything.
I'm on to phase 3 step 3 now, everything is going smoothly now. I had to run up to home depot for some M6 nuts, thought I had everything.
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Re: Isaac Mendel build September 09, 2010 08:31PM |
Now to phase 3, step 3, figure 8. On the belt routing bearing that slides up and down I used a regular nut instead of a nylock.
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Re: Isaac Mendel build September 09, 2010 09:23PM |
After many days of trying to tighten things with this stupid stanley hex wrench tool, I finally found the right tool to be a small screwdriver with the proper bit in there. That hex wrench is nearly impossible to use, designed by an idiot.
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Re: Isaac Mendel build September 10, 2010 08:11AM |
Finally, after 10 days of waiting, I see that the tracking number associated with my electronics kit from ebay finally shows that the package is on the way. This appears to be a problem with USPS, as the tracking number is supposed to follow the journey all they way from it's destination. The user deleted the ebay account shortly after my purchase and my email to the sender regarding the status of this package was never returned. This did not help to inspire confidence and I was on the verge of cancelling this order through paypal, but I'm glad I waited for that extra day to cancel it. Sheesh.
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Re: Isaac Mendel build September 10, 2010 08:28AM |
I hate to disappoint you BUT..."Electronic Shipping Info Received" doesn't mean much, only that the customer requested a package number.
It does not verify that a package has been physically received.
The "Processed through Sort Facility" MAY mean that something was physically received.
Edited 1 time(s). Last edit at 09/10/2010 08:29AM by rhmorrison.
Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse
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Re: Isaac Mendel build September 10, 2010 09:42AM |
no, it says processed through the denver sort facility duh.
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Re: Isaac Mendel build September 10, 2010 09:48AM |
Hopefully it's not a bag of rocks. 
Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse
Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse
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Re: Isaac Mendel build September 10, 2010 01:56PM |
Still waiting on usps, but the ups guy came already with more amazon.com stuff. The arduino book is very detailed with great pictures on exactly how to set up the breadboard and the codes. I really needed some better lighting in here. Everything seems to be evolving in the room.
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Re: Isaac Mendel build September 10, 2010 03:40PM |
At last, my headache went away. Today I finally received the coveted electronics kit with everything I need to proceed with the build. A giant weight has lifted I was beginning to think it was "too good to be true". I also got another amazon goodie, a desperately needed organizer.
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Re: Isaac Mendel build September 10, 2010 04:02PM |
Gone now are all the tacky looking mugs with nuts and bolts in them. This work area was starting to look like the nutty professor. This item was worth every penny.
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