Ordbot Hadron build (RepRapDiscount)

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Ordbot Hadron build (RepRapDiscount)

Postby Panopticon » Tue May 07, 2013 5:54 am

Hello all,

I'm new here and I just received my Ordbot Hadron today from RepRapDiscount. I ordered the ultimate electronics kit which includes the RAMPS 1.4 board with "Taurino"power (something I'm not too familiar with yet). This will be my second 3d printer build as I've already built a Bukobot Vanilla printer without too many hitches and now I'm moving on to the Hadron. If I could rate my build competence I would say I'm somewhat of an intermediate when building these things. For my first 3d printer build I had a set of visual directions and sub-text guide me through it so this build could prove a little more challenging in some areas. My kit has some of the mechanical parts pre-assembled, but I'll probably have to break them down to make fine adjustments.

Anyway!

A few things to note, and maybe some of you can address and offer up some advice during my build.

-End-stops - I want to use the hall effect end stops that came with the kit under the Y-axis carriage plate / what is the best strategy to mount them? I watched a video of a person with the same kit mounting them on the Y-plate, but he had to drill extra holes and flip the plate over to get the end stops in place. Is this necessary? I'd like to keep the plate intact as much as I can. Also, what kind of screws were used to mount the hall end stops ( I don't think they came in my kit). And what's a fail proof way to mount the magnets to be inline with the hall-effect end-stops?

-Wheels - Three of the wheels on the bottom of the Y-axis plate are not spinning against the maker-slide extrusion, I'm assuming they're not tightened against the extrusion, would tightening the nut on the bottom of wheels resolve this issue?

-Belts- - I've never utilized rubber belts before, I have G2 belts and pulleys - what's the best way to tighten them, they're pretty loose right now.

First things I want to accomplish are setting the end stops and tightening the belts and wheels before I hobble the frame together.
Last edited by Panopticon on Mon May 13, 2013 4:45 pm, edited 1 time in total.
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Re: Ordbot Hadron pre-build (RepRapDiscount)

Postby bloomingtonmike » Tue May 07, 2013 6:24 am

I think there is an endstop mount for the ord bot on thingiverse you can print out on your other machine. Search ord bot on thingiverse.

The belts you tension by loosining the tension plate's 5mm cap screw and sliding it till it is tight and then tightening the cap screw on that plate.

Their are two eccentric bushing/spacers (metal ones) on two of the V bearings - just rotate them - pretty sure it is 5/16 or 7mm wrench.
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Re: Ordbot Hadron pre-build (RepRapDiscount)

Postby Panopticon » Wed May 08, 2013 11:21 pm

Update: added hall-effect end stops on both ends of the Y-axis extrusion using what reprapdiscount posted on this thread viewtopic.php?f=16&t=1832 - it's supposed to used for the Z-axis however I didn't have an issue mounting them on the Y-axis extrusion. One concern is magnet placement - I've never used non-contact end-stops so I stuck the magnet on the bottom of the screw that holds the wheel on the build-plate, see img:

Image

The magnet nearly lines up on top of the microchip detector on the end-stop - is there a recommended effective area for this? Also, is it okay if the magnet is magnetically attached to metal screw? Will it affect the end stop, or should it be mounted differently?
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Re: Ordbot Hadron pre-build (RepRapDiscount)

Postby cozmicray » Thu May 09, 2013 4:29 pm

On the mendalmax 2.0 and Trinity A1 there has been a lot of problems
with the Taurino. Some replacing it with a standard arduino mega 2560.

route your end stop wires away from stepper motor drivers
and use shielded wire.

The eccentric nuts are used to tweak up the wheels
always mark them for extreme out position.

I raised the table with spacers to keep the belt from rubbing on the metal edge.

The belt holder underneath the table needs a mod to hold belt from slipping
and inducing y errors
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Re: Ordbot Hadron pre-build (RepRapDiscount)

Postby Panopticon » Fri May 10, 2013 12:57 am

cozmicray wrote:On the mendalmax 2.0 and Trinity A1 there has been a lot of problems
with the Taurino. Some replacing it with a standard arduino mega 2560.

route your end stop wires away from stepper motor drivers
and use shielded wire.

The eccentric nuts are used to tweak up the wheels
always mark them for extreme out position.

I raised the table with spacers to keep the belt from rubbing on the metal edge.

The belt holder underneath the table needs a mod to hold belt from slipping
and inducing y errors


Thank you for the advice - I have some questions about some of your input.

1. What brand / size wire shielding do you recommend for the end stop wires?
2. What do you mean by "extreme out position" ?
3. How can I mod the belt holder on the bottom of the Y-build plate, incase of slippage?

UPDATE*

I've purchased a Ubis J-hotend from Printrbot. Can anyone recommend an extruder driver that works very well with the same or similar hot-end ?

Thanks
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Re: Ordbot Hadron pre-build (RepRapDiscount)

Postby cozmicray » Fri May 10, 2013 1:24 am

Answers below


Thank you for the advice - I have some questions about some of your input.

1. What brand / size wire shielding do you recommend for the end stop wires?
Some 18 / 20 gauge wire with a shield
http://www.radioshack.com/product/index ... Id=2062643

2. What do you mean by "extreme out position" ?
if you look at the nut's hole you can see the eccentricity and determine when bearing is out

3. How can I mod the belt holder on the bottom of the Y-build plate, incase of slippage?
I drilled and tapped a hole from the side and put in screw to clamp belt.

UPDATE*

I've purchased a Ubis J-hotend from Printrbot. Can anyone recommend an extruder driver that works very well with the same or similar hot-end ?

The EZStruder Extruder Kit + Stepper Motor NEMA 17
http://shop.seemecnc.com/EZStruder-Extr ... -707XX.htm
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Re: Ordbot Hadron pre-build (RepRapDiscount)

Postby cozmicray » Fri May 10, 2013 1:58 am

oops
Hall effect stops will need three wires

could use shield as ground
or
you could get some stereo audio cable 3 wire and shield

http://www.allelectronics.com/make-a-st ... AIN/1.html

http://www.skycraftsurplus.com/3con18awgfoilshd.aspx
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Re: Ordbot Hadron pre-build (RepRapDiscount)

Postby Panopticon » Fri May 10, 2013 2:11 am

cozmicray wrote:oops
Hall effect stops will need three wires

could use shield as ground
or
you could get some stereo audio cable 3 wire and shield

http://www.allelectronics.com/make-a-st ... AIN/1.html

http://www.skycraftsurplus.com/3con18awgfoilshd.aspx


Awesome thanks, my kit came with un-shielded wires for the end stops with connectors on the ends, I'll probably just snip the connectors off and wire them back on the shielded wire.

Does having those wires close to the stepper motor drivers cause interference?
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Re: Ordbot Hadron pre-build (RepRapDiscount)

Postby cozmicray » Fri May 10, 2013 3:58 pm

Does having those wires close to the stepper motor drivers cause interference?


There has been a lot of chatter with taurino board about this,
end stops being triggered at random times.
Adding pull up resistors etc.

I have mechanical switches with unshielded wires with Atmega 2560/RAMPS
with NO problems. I use Normally Closed NC connection.

Have Phun
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Re: Ordbot Hadron pre-build (RepRapDiscount)

Postby Panopticon » Sat May 11, 2013 12:37 am

cozmicray wrote:
Does having those wires close to the stepper motor drivers cause interference?


There has been a lot of chatter with taurino board about this,
end stops being triggered at random times.
Adding pull up resistors etc.

I have mechanical switches with unshielded wires with Atmega 2560/RAMPS
with NO problems. I use Normally Closed NC connection.

Have Phun


I see, I'll take your advice and use shielded wires for the end stops. My other printer is totally un-sheilded, I've yet to experience any issues yet with random end-stop triggering though it's running an Azteeg X1.

Thank you for the links. I purchased the EZstruder extruder from SeeMeCNC, I snagged one when it was on sale. Has anyone used this extruder on an Ordbot? Does it easily mount to the X-axis plate?
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