Search found 116 matches

by dangre
Wed Mar 18, 2015 11:11 am
Forum: Electronics
Topic: Understanding Microstepping
Replies: 9
Views: 11377

Re: Understanding Microstepping

mm_per_steps = 1 / ((motor_steps_per_rev * driver_microstep) / thread_pitch)
1 / ((200 * 16) / 10) = 0.003125 mm or 3.125 microns
by dangre
Wed Mar 11, 2015 2:03 pm
Forum: Resins
Topic: Can we use salt water on a bottom up machine ?
Replies: 4
Views: 7858

Re: Can we use salt water on a bottom up machine ?

Yea, same conclusion there... If you can get a 0.10mm or 0.05mm or 0.02mm(0.0008") layer of resin to replenish and settle consistently between the build plate and the 'salt water' then you got a solution. I just don't see how you would do it. If you are going to use a film why not use FEP film ...
by dangre
Fri Mar 06, 2015 4:43 pm
Forum: LittleRP
Topic: Connection Block Diagram
Replies: 8
Views: 6617

Re: Connection Block Diagram

PomperoyB, Actually, I could not get any better results with the VGA other than the one shown in the picture. It was setup for VGA originally (which is what I had been using for months) but decided to try HDMI on another laptop using the same settings (SubG+, 100umXYZ, 14 sec exposure, FEP flex vat)...
by dangre
Wed Mar 04, 2015 10:21 am
Forum: LittleRP
Topic: Connection Block Diagram
Replies: 8
Views: 6617

Re: Connection Block Diagram

Here is a comparison I did comparing VGA vs. HDMI using the exact same settings. The HDMI is much 'clearer'.
by dangre
Wed Mar 04, 2015 9:47 am
Forum: Vat Design and Construction
Topic: Flex bottom VAT
Replies: 70
Views: 92389

Re: Flex bottom VAT

Francesco,
Just like everyone else said: very taut tension and holes in build plate. One thing I would add is a longer pause after the build plate comes down and before exposure to allow the resin hydraulic pressure to equate. Very nice vat, what is your build area?
by dangre
Tue Mar 03, 2015 4:15 pm
Forum: Vat Design and Construction
Topic: FEP vat challenge
Replies: 22
Views: 38073

Re: FEP vat challenge

Graber, No tension - no consistency - poor results. FEP will deform a lot under just a bit of temperature increase if not tensioned properly. Just the weight of the resin on untensioned FEP will make it bow. I was pulling my hair out once when my previously perfectly working machine would not adhere...
by dangre
Mon Mar 02, 2015 9:56 am
Forum: Vat Design and Construction
Topic: FEP vat challenge
Replies: 22
Views: 38073

Re: FEP vat challenge

Bravo,
I like your take on the flex vat idea. I also would like to thank the assistance of Henry for his knowledge and sharing. I will publish my FEP comparison soon. May I ask what projector and exposure times you are using?
by dangre
Thu Feb 26, 2015 10:24 am
Forum: 3d Prints
Topic: Bionic Hand
Replies: 9
Views: 10006

Re: Bionic Hand

HP, amazing results, again! Remind me, what projector and resin are you using?
by dangre
Thu Feb 26, 2015 10:10 am
Forum: Hardware
Topic: LCD printer graphical display, Viki 2
Replies: 1
Views: 4261

Re: LCD printer graphical display, Viki 2

I've had one in a box for over a year for a FDM printer I never built. Having too much fun with my DLP. I dont see how you would actually use it for a DLP...