Go Back   EcoModder Forum > EcoModding > Fossil Fuel Free > Open ReVolt: open source DC motor controller
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 06-22-2009, 01:55 PM   #1781 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 267 Times in 210 Posts
Very nice, looks like a couple motion conservation optimizations are yet possible on the cuts (like around 3:40, cut a 33% square wave all the way across in one direction and fill in the remaining corner cuts on the reverse direction), but an inspirational bit of automation there certainly

__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 06-22-2009, 02:05 PM   #1782 (permalink)
EcoModding Lurker
 
Join Date: Jul 2008
Location: Memphis, TN
Posts: 58

2010 Prius - '10 Toyota Prius IV
Last 3: 51.4 mpg (US)
Thanks: 0
Thanked 1 Time in 1 Post
Nice job. What weight of copper clad is that and where did you buy it?
  Reply With Quote
Old 06-22-2009, 02:19 PM   #1783 (permalink)
Master EcoModder
 
Join Date: Apr 2009
Location: Charlton MA, USA
Posts: 463

EVVette - '71 Chevy Corvette Coupe
Thanks: 31
Thanked 172 Times in 92 Posts
Quote:
Originally Posted by MazdaMatt View Post
*sigh*... beautiful
Matt,

O it is, Isnt it. I love watching a project come to life right in front of you.

Quote:
Originally Posted by dcb View Post
Very nice, looks like a couple motion conservation optimizations are yet possible on the cuts (like around 3:40, cut a 33% square wave all the way across in one direction and fill in the remaining corner cuts on the reverse direction), but an inspirational bit of automation there certainly
DCB,

Yes, I wasnt happy about the amount of time wasted in the cuts there, but I wanted to get these back to Paul as quick as possible. I am working now on optimizing the code to run as efficient as possible.

As for the 33% square wave you talk about, I have no idea what you mean. LOL Could you explain some more?


Quote:
Originally Posted by JayC View Post
Nice job. What weight of copper clad is that and where did you buy it?
Jay,

This is the 3oz stuff Paul is using for the boards. I got it from him. Ive made 2 of these. They are going to be the other 2 Beta controllers. Im sending them back to him today. 2 day mail. They will be there Wednesday so he can get going on them.

-Adam
  Reply With Quote
Old 06-22-2009, 03:11 PM   #1784 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 267 Times in 210 Posts
Quote:
Originally Posted by adamj12b View Post
As for the 33% square wave you talk about, I have no idea what you mean. LOL Could you explain some more?
No prob, here is a pic, choose which direction to start the red 33% square wave from based on where the bit is right before you start the cut. After cutting the red "square wave" in one direction, do the blue corners going in the opposite direction and you can shave off a couple overlapping cuts and a bit of repositioning time. You should never have to "back up" with this approach for this pattern.

Attached Thumbnails
Click image for larger version

Name:	untitled.GIF
Views:	376
Size:	3.2 KB
ID:	3754  
__________________
WINDMILLS DO NOT WORK THAT WAY!!!

Last edited by dcb; 06-22-2009 at 03:26 PM..
  Reply With Quote
Old 06-22-2009, 03:25 PM   #1785 (permalink)
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,831

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,367
Thanked 1,115 Times in 730 Posts
Quote:
Originally Posted by adamj12b View Post

Thats alot better then Pauls 2-3 Hours by hand.

Enjoy

-Adam
Actually, it's 2-3 days by hand including drilling holes. I need lots of breaks so I don't get sloppy.

DCB: The economy of motion issues come from the fact of making it easier to do it that way by hand. Also, the paths should be changed a bit. I chose them so that everything was a multiple of a half crank on the mill. That's not quite optimal.

Also, my mill has some slop, so I try to only go from up to down, and left to right to avoid any gear slop. (It's sort of hard to explain)

JayC: Ebay for 3 ounce copper.
__________________
kits and boards
  Reply With Quote
Old 06-22-2009, 07:19 PM   #1786 (permalink)
Electronics Packrat !!!
 
Royal's Avatar
 
Join Date: Jun 2009
Location: Indiana
Posts: 15
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by watt-a-mezz View Post
Hi,Paul. Looks like you have been busy. Listened to the podcast, and took a look at all of the pictures. I can see why you would want a pre made power board, the control board I could assemble (with large amounts of concentration). I would like to participate in a group buy, whenever you decide to do one. Hope the B'day party went well, and to you, and all the dads out there, have an awesome Fathers Day. Take care, Watt
Hello Paul:

I listened to your podcast today. Count me in on your group parts order. Let me know when.
Thank you,

Royal
__________________
Have a great EV day !!! Please Donate !!!
"Help FIX the 144V Open Source Motor Controller" !!!
Link is (http://greencarvideos.blogspot.com/)
  Reply With Quote
Old 06-22-2009, 07:53 PM   #1787 (permalink)
EcoModding Apprentice
 
Join Date: May 2009
Location: Orrville, Ohio
Posts: 108
Thanks: 9
Thanked 2 Times in 2 Posts
Thumbs up

adamj12b, hi. Enjoyed the video, have always liked watching cnc milling machines. Nice part is, the quality of the hand milled boards remain, but the machine can do it so much faster. Wonderful Good, as my old Dutch uncle would say, Keep us posted. Watt
  Reply With Quote
Old 06-22-2009, 09:06 PM   #1788 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 267 Times in 210 Posts
Quote:
Originally Posted by MPaulHolmes View Post
DCB: The economy of motion issues come from the fact of making it easier to do it that way by hand.
Lol, I sorted it out and am embarrassed to say how little motion you would save with my proposal but its about 0.2 parts out of 13. You would have to make a lot of boards to make it worth the effort to change a working thing.
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 06-23-2009, 03:37 AM   #1789 (permalink)
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,831

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,367
Thanked 1,115 Times in 730 Posts
I'm going to try to put the tin plating on the bus bars and pcbs when they arrive. I'm sorry, Adrian! I tried to mail some of the tin salts stuff that you dissolve in hot water that tins the metal, but the shipping people were really worried that it wouldn't make it through customs, since it was just in 2 separate plastic bags. Oh no! Crack Cocaine! haha!

It would be nice to figure out a good safe way to get the bus bars soldered to the PCB (but not too hot!) so the silver conductive epoxy wouldn't be necessary. That crap is expensive! Any cheap easy suggestions to not let it get too hot, but hot enough for solder? Once it's tinned, I think the solder will spread out nicely. Could there maybe be a hot thingy that you attach to one end that slowly heats the whole bar to solder temperature. I think it would be good if the bar was already bolted before soldering, to make sure it was nice and tight against the pcb. However, then the pcb would act as a heat sink. How tough is that glue that keeps the PCB together?

Today, I cut some of the other bus bars, and smoothed out the holes in everything so there would be good contact. Adrian will have to do that with his too (well, if he wants! hehe. He can do whatever the heck he wants!).

Here's some of the smoothing process.


ghetto superstar! That is what you are:


This is necessary, because copper gets sort of hot and stretchy sometimes:


My dog died with a sausage in her mouth from breakfast:
Note: She's not dead in this picture. That's how she used to sleep. Her name was doggie. I put her on here by accident, because she's the same color as a bus bar, so I got confused.
__________________
kits and boards
  Reply With Quote
Old 06-23-2009, 04:14 AM   #1790 (permalink)
EcoModding Lurker
 
Join Date: Apr 2009
Location: Maine
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by wjdennis View Post
Black Panther, this discussion has moved to another thread "Open ReVolt as Charger". But with the setup you mention, how would I control the amount of current that the lower C pack delivers? The purpose of the controller was to not let the lower C pack go above 70A. If the two packs were just connected through Mosfets, I wouldn't be limiting that. In that case, I might as well just do away with the Mosfets altogether and just connect the two packs directly to each other.

Bill
wjdennis

I couldn't find the new thread. anyway the idea is that the second pack would be smaller capacity, but newer tech with a high C rating and the same nominal voltage. if preserved as a fresh pack until that hill, when you paralleled them, the second pack should supply the majority of the current simply by the balance of each packs capability to deliver the current. your low C pack will tend to sag as it approaches its c rating and when paralleled to a high C pack which maintains the voltage, the low C pack will not be able to push as much current because the paralleled voltage is higher than what it can push that much current in to.

Without the second pack connected, the voltage would drop more under load and your low C pack delivers more current at the expense of battery stress.

With the high C pack connected, the high C pack will not stress until much higher current loads, so it can keep the paralleled voltage at a respectable level until you have nearly depleted them.

I hope this clarifies it somewhat.

__________________
"Experience is something you get right after you need it !"

http://www.diyelectriccar.com/garage/cars/143

http://www.diyelectriccar.com/forums...tor-32083.html
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Paul and Sabrina's Cheap 3 Phase Inverter (AC Controller) with Field Oriented Control MPaulHolmes Fossil Fuel Free 3471 06-01-2020 11:53 PM
Paul & Sabrina's Cheap EV Conversion MPaulHolmes Fossil Fuel Free 542 11-12-2016 10:09 PM
Three Dirt Cheap DIY Electric Cars - Part 5 SVOboy EcoModder Blog Discussion 0 12-12-2008 05:10 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com