Search found 58 matches

by sitzme
Tue Feb 18, 2014 4:44 pm
Forum: Hardware
Topic: FIRMWARE
Replies: 16
Views: 30978

Re: FIRMWARE

The hardware and firmware needed varies a bit since so many of us have unique machines. Some use only the Z axis and some have tilt, pumps, other... That being said, the RepRap community has provided a pretty good selection of low cost controls and firmware. I also use Sprinter with an Arduino 2560/...
by sitzme
Thu Feb 06, 2014 10:56 am
Forum: Hardware showcase / Build Logs
Topic: DLP 3dprinter build
Replies: 6
Views: 17820

Re: DLP 3dprinter build

A negative example is still good. It gives us a chance to learn from your mistakes and make brand new ones of our own! Lets see some pics/drawings! I am also behind on documenting most of my build but have tried to post the things that were different. Life gets in the way sometimes.
by sitzme
Tue Feb 04, 2014 10:02 am
Forum: Z-Axis and Tillt/Slide axis
Topic: Dual stepper for Z-Axis?
Replies: 8
Views: 21226

Re: Dual stepper for Z-Axis?

Hi Clinton. It sounds like you have a good handle on the hardware requirements. Ultimately, it is going to depend a lot on the area of your build plate. Mine is a large build area so I am using a 5:1 gearhead and NEMA 23 motor. I thought it would be too slow but am finding that it releases better wh...
by sitzme
Mon Feb 03, 2014 12:55 pm
Forum: Resins
Topic: Makerjuice seems to eat enamel paint
Replies: 7
Views: 15810

Re: Makerjuice seems to eat enamel paint

I have also had some paint come off. I am mostly using SubG+ but have run a little SubG. I wonder how any of the resins react to the various metals in use? Maybe we just have to coat all contact surfaces with PDMS!?
by sitzme
Mon Feb 03, 2014 12:52 pm
Forum: General
Topic: Top down wins...
Replies: 15
Views: 42414

Re: Top down wins...

Thanks for taking the time to document the arguments. If a suitable liquid can be found to displace the resin and lower the amount of resin required, top down may take off. Mercury comes to mind. (not really!) So far I am not aware of anyone having great success though some have tried salt water wit...
by sitzme
Mon Feb 03, 2014 12:42 pm
Forum: Z-Axis and Tillt/Slide axis
Topic: Dual stepper for Z-Axis?
Replies: 8
Views: 21226

Re: Dual stepper for Z-Axis?

You may find that it can take a lot of force to break the part loose from the vat bottom. The other considerations are how repeatable your Z move will be and the addressable resolution. For example, if the finest move you can command is .075 mm you definitely can't do a .05 mm layer. You also might ...
by sitzme
Fri Jan 31, 2014 7:35 pm
Forum: Creation Workshop
Topic: Creation Workshop RC3 - Not on GitHub
Replies: 5
Views: 14309

Re: Creation Workshop RC3 - Not on GitHub

Can we copy the machines and profiles over from rc2?
by sitzme
Fri Jan 31, 2014 10:34 am
Forum: Resins
Topic: procedure(s) for determining exposure time
Replies: 7
Views: 19770

Re: procedure(s) for determining exposure time

The file has been added. Thanks John.


It was .xls. I thought about posting the results as .csv but thought that people would have more use for the formula. As you can see it is pretty simple.
by sitzme
Wed Jan 29, 2014 10:47 am
Forum: Resins
Topic: procedure(s) for determining exposure time
Replies: 7
Views: 19770

Re: procedure(s) for determining exposure time

I took a print setting found on the net and came up with 82.48 lumins per cm^2 per .075mm thickness. I used it as a starting point and it came close. I think that the value will vary depending on the resin but with my limited experience it seems to be linear. I tried to post my spreadsheet but got a...
by sitzme
Wed Jan 29, 2014 10:18 am
Forum: Z-Axis and Tillt/Slide axis
Topic: Passive tilt
Replies: 7
Views: 20605

Re: Passive tilt

Do you think that there is any need for a shock absorber or anything to control the rate that the vat returns? Is there a stop that limits the vat travel? I too am glad to see someone try this as I am a fan of simplicity. Have you made any attempts without the Sylgard? Keep us posted. This could als...