Cool engineering

Extruder mechanism upgraded: Bondtech Dual Drive

Since early July, we have a had a very successful working relationship with Bondtech, the Swedish company producing Dual Drive extruders. The Bondtech extruders without question have brought a step change in reliability of extrusion. Main characteristic of course is the driving mechanism used: Twin counter rotating hobbed wheels.

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EMV-MC faceplate

Teaser alert! What we have been secretly organising

You know the counter in the machine tools page. Well it is counting down to the 19th of August 2016, the day we unveil our grandest product to date. the unveiling will be done in the Thornbury model engineering exhibition so why not check us out at stand 134.

You can find more about the BSMEE on the official exhibition webpage

 

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BCN3D Sigma: Cleaning the filament feeder

About 7kg of filament later and lots delightful prints with the BCN3D Sigma we noticed  that ground filament and dust had accumulated on the extruder feeder gear. Perfect opportunity to clean the filament feeder by taking it apart, checking out how it is engineered and learn a bit more about the Sigma!

Here is how we did it step by step.

Step 1. Unscrew the socket cap screw shown below to release the bottom Bowden tube. the printed part holds against a nut which is screwed on the tube. Simple and effective!

BCN3D Sigma feeder, lower bowden tube fixing
BCN3D Sigma showing the bottom bowden filament guiding tube fixing system, nut and printed part

Step 2. Unscrew the 2 nuts holding the stepper motor board shield and unplug the stepper motor. Try not to lose the tubular spacers! Take them out and store them safely.

Unscrewing the stepper motor driver board shield on the BCN3D Sigma
BCN3D Sigma extruder motor stepper motor driver board exposed

Step 3. Remove the top Bowden tube from the feeder by pushing down on the grey ring and pulling the tube out . Then unscrew the nuts holding the stepper motor bracket on the frame. Remove the feeder from the Sigma.

Removing the top bowden tube of the BCN3D Sigma
Removing the extruder feeder from the BCN3D Sigmas frame

Step 4. Now start taking the feeder apart. Unscrew the large grub screw and remove the tension adjustment spring. Then unscrew the 3 long hex screws which hold all the parts on the stepper motor.

Unscrewing the tension screw of the BCN3D Sigma extruder feeder
Removed screws from the extruder feeder of the BCN3D Sigma

Step 8.  Dissemble the feeder and clean all the parts from filament grindings and dust with a small brush. A toothbrush will also do!

The parts of the extruder feeder of the BCN3D Sigma 3D printer
Brushing off the dust from the feeder gear on the BCN3D Sigma

Step 9. Reassembly time! Start  by placing the aluminium bracket with the bent part facing towards the cables. Then the plastic spacer and pinch levers as shown below.

Reassembly of the extruder feeder of the BCN3D Sigma
Reassembly of the extruder feeder of the BCN3D Sigma
Reassembly of the extruder feeder of the BCN3D Sigma
Reassembly of the extruder feeder of the BCN3D Sigma

Step 10. Insert the tension spring through the hole of the top lever and screw in the large grub screw to compress it. In my experience 1 turn after the top of the screw is flush with the lever surface give a good starting point in terms of spring tension.

Reassembly of the extruder feeder of the BCN3D Sigma tension spring
Clean_17

Step 11. Take the feeder back to the Sigma and fix the bottom Bowden tube on before mounting on the frame, makes life easier! Then slide the feeder on the studs of the frame and fix it in place with the 2 nuts. Connect the motor back to the driver. IMPORTANT! Don’t forge the spacers!!! 2 on each side of the board.

Clean_20
Clean_21_2

Step 13. Fix the aluminium stepper driver shield back on and insert the top Bowden tube. Done! grabs beer…

Clean_22

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CAD mock up of R8 Spindle and QTC tooling

Drawbar tension for R8 and MT3 collets to work safely with QTC tooling?

We have been asked on a number of occasions, and seen in a number of forums, the question of “How much tension should I put on my drawbar when I use  Emvio (or Tormach) repeatable Z tooling?” This question is a very common for those looking to make a pneumatically actuated drawbar using Belville washers. So what do you need to know about Drawbar Tension?

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Emvio Engineering is now a reseller of all BCN3D products

It is with great pride that we bring to the UK market the products designed  BCN3D Technologies.

BCN3D Technologies started off as a project of Fundació CIM, which has more than 20 years of experience in Rapid Prototyping and knowledge transfer. The results have been impressive and that is why when we first came across the company, we were keen to collaborate with them

We will be keeping stock of as many of their products as our limited storage space allows but will be giving priority to the Sigma. As you may have seen in our earlier post, we were giddy with anticipation when the Sigma was released. In no time you will be able to browse our shop for all four of BCN3D printers:

BCN3D Sigma 3D printer

The BCN3D Sigma – The flag ship model that received the best quality award on 3Dhubs page for April

The BCN3D Lux – A SLA machine working with photoreactive resin allowing for fantastically fine layers and printing speed

BCN3D+ kit

The BCN3D Plus – A Prusa clone kit aimed at those wanting to build their own printers

BCN3DDR Delta Printer

The BCN3DR – Another kit but this time for a Delta printer

BCN3D Ignis laser cutter

The BCN3D Ignis – a premium 100W CO2 laser cutter with honeycomb bed and a 900×650 working area

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Emvio Engineering Nema 17 stepper motor damper installed

Damping the sound of stepper motors on 3D printers

Most of us that tinker with 3D printing have wondered how to reduce the groan and squeal of the stepper motors driving us nuts. Especially when long prints are involved!

For a while now we have been using and selling our own vibration dampers that place a rubber buffer between the stepper and the printers frame. The rubber is thin and stiff enough to maintain accuracy of the stepper motor while reducing the vibrations being transmitted to the body of the printer.

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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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3D printing obsolete machine parts

Being thrifty in the time of turmiol and economic difficulty is imperative to survive as a company. This has been the case with Oyzo manufacturers Giokarinis of Samos. Every summer we return to Samos for around two weeks to return to our roots and the directors of the company are close personal friends. It was over a glass of ouzo that we started discussing that their factory would have to reduce production in as they were having issues with sourcing spare parts. Bearing in mind that the machines are mature and well used, the original manufacturer had sold up and there are capital controls in place, it was almost impossible to source and import parts.

We took on the challenge to design and manufacture some of the more critical wear parts: the bottle neck grippers

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Quick change and repeatable Z tooling for MT3 and R8 spindles?

Industrial and hobby machinists alike all have the same pet hate when it comes to changing tools whether using a Bridgeport knee mill or a bench top CNC mill:

“It takes too long!”

Lets explore this topic and how Emvioeng.com will help small and large workshops alike become more efficient.

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OnShape logo

Web Browser based CAD? OnShape seems to think its OK

It is not often that the CAD industry gets shaken up as much as it has in the past 12 months. First we had Autodesk Fusion 360 coming out with a Cloud based service and we have recently received word of OnShape.

The pedigree of OnShape could not be purer, it is spearheaded by the founders of Solidworks, an industry favourite for as long as I can remember.

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Dear Customers: a major part of our team will be on holiday from 23rd August until the 9th of September. We have made arrangements to fulfill outstanding orders as promised but some new ones will need to wait. Thank you for your understanding. Emails will be answered though... Dismiss