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BCN3D Sigma 3D Printer

We take it apart so you don’t have to: BCN3D Sigma

The only way to be sure that any machine is really well designed is to take to bits and have a look inside it! That’s what we did at Emvio Engineering with our BCN3D Technologies Sigma! Oh why not check it out in our shop too
Under the beautiful bottom cover of the Sigma we found the electronics and were impressed with the cable management and over all neat setting.

Preparation

Then it was time to pull the Z axis out for a closer look… The 2 vertical rods are held in place with welded studs on the frame which made the task very easy. The print bed support made of bent aluminium is very stiff and those side cuts look awesome. The black heat bed sits on a cork pad and both are suspended by 3 springs in triangular arrangement.

I did wonder what was behind the slick looking print heads. Started by removing any screw stood in my way! The nozzle was out and in less than 10 seconds in under a minute the linear slide was revealed. It runs unworldly smooth with no play at all!

Here is the official maintenance video from BNC3D Techonologies showing how easy it is to remove and replace the hotend

To Be Continued..
in the next episode we will take apart the X, Y motion system and extruders!

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BCN3D Sigma 3D Printer

Exciting times, European 3D printer that kicks ass!

After looking around for a the hottest 3D printer to try, we have finally settled on a brand that will give the top players a run for their money.  So we would like to tease you all with the new kid on the block:

BCN3D’s Sigma

 

Pretty sleek. Serious engineering going on and a CE mark to boot.
Where can you start?

  • Enclosed design with 210x297x210mm build volume
  • Dual heads independent that park when not in use
  • Profile linear rail, not round bar, on the axes!!!!!!!!!
  • TOUCH SCREEN!!!

Now to blow even the most sceptical away, check out the calibration procedure:

Interested? Keep watching this space

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Messy Cables

Smoothstepper series: Connect it up

Connect it up

In the first post of our series, we discussed some ways to mount your Smoothstepper in your control box. In this post we would like to share some thoughts on how to connect the boards electrically to you drives, switches, encoders and relays.

The most important connection to make is that between your computer and the Smoothstepper. Needless to say, we insist on using a good quality cable for this. All our Ethernet Smoothstepper bundles ship with CAT-6 Ethernet cables. If you have preferred the USB variant then it would be wise to buy a good quality cable and add a ferrite ring to it.

Thinking of the Smoothstepper 2.5 (USB version) or 3 (Ethernet) parallel ports in one (with benefits of course). So you have the options to go with three breakout boards (BOB) that then connect to stepper drives, switches or relays or an all in one solutions that incorporate the drives and the BOBs. The Smoothstepper is outfitted with 26 pin headers on it that will require suitable ribbon cables. We supply ribbon cables with the D25 port connector on the end as we have seen the boards mostly used with BOB’s anyway.

As you may already know, Ports 2 and 3 of the Smoothstepper can have pins 2 to 9 set as inputs or outputs in the plugin. When selecting a BOB, make sure you are getting what you want because usually on port 2, pins 2-9 are input only.

For port 1 only, there is no reason not to go with the generic and readily available and cheap 5 axis breakout board. These boards usually offers optical isolation to your Smoothstepper and sometimes comes with a relay built in. Cheap and cheerful!

In some forum discussions it has been noted that the Breakout board optocouplers may not be as quick at reacting to pulses as the Smoothstepper is to send them. This may be the case on some very cheap breakout boards. On the ones we stock, the reaction time of the worst one was 175ns (nano seconds). That means they are able to accomodate frequencies of up to 5MHz, with the Smoothstepper being able to transmit at up to 4MHz.

A number of other suppliers have expansion boards that link directly to the Smoothstepper with the our recommendations being:

  1. The PDMX-126  is a very capable board and offers a very neat solution for connecting you Smoothstepper up. This is a top notch board that is worth its money if you are willing to pay the price and import duties from the USA.
  2. Our favorite in terms of value is the unassuming C25 as developed and sold by CNC4PC . This board provides a good saftey barrier between the drives, switches and other peripherals and the Ethernet

 

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Dear Customers: We are gearing up for the BSMEE exhibition, in Thornbury, that will be run 18th-20th of August. Along with upcoming holidays, we are very likely to be slow in fulfilling orders until middle of September. Thank you for your understanding. Dismiss