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Hand-Operated Plastic Injection Molding Machine
Designed for making prototypes and short-run production.

The model 20A PIM-SHOOTER™ from LNS Technologies is a unique accessory that turns any...

Tests have shown that the injector can inject a part approximately every 60 seconds. So one could produce 50-60 parts per hour.

The drill press model plastic injection machine is limited to 0.4 cubic inches (or 7.0 grams of Polystyrene) per shot.

The company will soon release a low cost bench model with a 1.5 cubic inch...

I saw this brand new injection molding machine for sale for $595:

LNS Technologies - Hobby Benchtop Plastic Injection Molding Machine - Benchtop Injection Molder

-Ed

http://http://www.youtube.com/watch?v=uD-kCf8amHk

Here is a USA made plastic injection molding machine I found that sells for $595:

LNS Technologies High Tech Products for Hobby, Education and Business

The website has a couple of aluminum...

Here is a USA made plastic injection molding machine machine I found that sells for $595:

LNS Technologies High Tech Products for Hobby, Education and Business

They even have a video of the...

Pete,

Yes, I did try to remove the machine marks on 1/2 of the mold. But it is still not a nice "mirror" finish. There must be some tricks that professional mold makers use.

Pete,

One thing I've learned while experimenting around with injection molding, is that plastics like acetal and ABS pick up ANY machining marks and reproduce them on the surface of the plastic...

Yes, the guitar picks were made in an aluminum mold using the drill press mounted injection machine from http://www.techkits.com/pim.

A friend with a Tormach CNC mill made the mold for me.
...

Hi,

I was trying to do the same thing! So I purchased this machine:

LNS Technologies High Tech Products for Hobby, Edcucation and Business

And a friend with a CNC machine made me an...

I found this video showing one in action:

Make Your Own Plastic Parts With This Injection Molding Machine - YouTube

The company that made it is: LNS Technologies High Tech Products for Hobby,...

I use Enco cutting & tapping fluid:

Enco cutting & tapping fluid

-Ed

RS1 and RS2 should be 0.5 Ohm resistors rated at least 3 Watts, preferably 5 Watts.

Vref should NOT be connected to 5V! The voltage on the Vref pin sets the motor current per this formula: ...

Jumpers J4-J7 allow the STEP and DIRECTION opto-isolators to be configured as either common ground or common +5VDC. If the inputs are driven by an external source that has only ground available,...

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I have seen the IC's for sale and datasheet at: www.techkits.com

Yes, the SLA7062M chips and the PC Boards are still available at:

www.techkits.com

Cool design. The bearings seem to be manufactured in China. Are they available to purchase in the US?

I know Bishop Wisecarver bearings can be purchased in the US, but their prices are quite...

Clyde,

The sense resistors carry the motor current which can be a maximum of 3 Amps.
I use 0.3 Ohm, 3 Watt resistors. (Power dissipation = I*I*R) 3 x 3 x 0.3 = 2.7 Watts. So 3 Watt resistors...

The Allegro SLA7062M is a nice unipolar driver chip that I have used.

The datasheet can be found here: www.techkits.com/SLA7062M.pdf

Page 11 of the datasheet shows applications information. ...

The Allegro / Sanken SLA7062M Unipolar Microstepping Driver ICs are for sale at the reduced price of $10 each. (No minimum order) See: www.techkits.com

I have the Allegro / Sanken SLA7062M Unipolar Microstepping Driver ICs for sale at the reduced price of $10 each. See: www.techkits.com

Here is a website that sells CNC power supplies:

http://www.techkits.com/industrial/

shahidmk,

I have developed a circuit board for the SLA7062M unipolar microstepper IC.

The STEP & DIRECTION inputs are opto-isolated and can be configured as PNP sourcing or NPN sinking.

It...

philba,

As you mentioned, I'm relying on the schmitt triggers to provide some noise immunity. A low pass filter with the wrong cutoff could accidentally limit the step rate.

About the sync...

I have designed a circuit board for the SLA7062M Unipolar 3-Amp microstepping driver IC from Allegro/Sanken.
With CNC applications in mind, it features optically isolated inputs and an idle current...

I have the SLA7062M IC's for sale in single quantities. Check out: www.techkits.com