Search found 157 matches

by U.S. Water Rockets
Wed Nov 02, 2016 1:11 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

I support replacing the I2C with say, RSS485, run over a quarter mile spool of rusty barbed wire before it goes to the Rambo (I kid, but there are far more resilient standards, and something like RS485 is high enough data rate even at over a kilometer of length). I2C is a fine protocol for small ru...
by U.S. Water Rockets
Thu Oct 27, 2016 11:03 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

Basically. It will need the HE280 connector on one long edge and pads for the 8 wires on the other. The processor chip and 5v regulator (maybe depending on processor) and an LED to show the touch and relay messages on startup. I'm also thinking a row of four 2 pin headers to use for setting the sen...
by U.S. Water Rockets
Thu Oct 27, 2016 12:34 am
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

It's not the assembly I need help with yet, its the design of the board from the prototype. I'd be happy to help out with that, if you settle on a design. If I understand what you're looking for, it would be very similar to my recent altimeter project. Is this the sort of thing you're looking for? ...
by U.S. Water Rockets
Wed Oct 26, 2016 2:43 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

It looks like it comes in a 8-pin PDIP package, if you wanted to play with them. If you think you would like the try this, I suggest you sign up for an account on TI and request samples. They are really good with stuff like that. An advantage to doing it over I2C is you don't have to worry about fir...
by U.S. Water Rockets
Wed Oct 26, 2016 2:38 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

mhackney wrote:And that's exactly what happens! If the hotend is on when you probe, bad things happen.

Do you need one of those drivers at each end?


Yeah. Technically one chip on each end of the long run I2C bus.
by U.S. Water Rockets
Wed Oct 26, 2016 2:28 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

One of the objectives of this project is to significantly shorten that nearly 1m long I2C line from the HE280 to the controller. That is really stretching the limits of I2C and probably the primary reason you have to probe with the hotend cold, to avoid noise on the line. You're correct. I was conc...
by U.S. Water Rockets
Wed Oct 26, 2016 2:21 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

I know 2s compliment and that was my observation, I don't see how it works with the data I'm getting. And the "left justified" format statement. Not sure what that means, justify the MSB or ? You configure it to return temps at initialization and then when you read the 2 temp registers (H...
by U.S. Water Rockets
Wed Oct 26, 2016 2:08 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

I know 2s compliment and that was my observation, I don't see how it works with the data I'm getting. And the "left justified" format statement. Not sure what that means, justify the MSB or ? You configure it to return temps at initialization and then when you read the 2 temp registers (H...
by U.S. Water Rockets
Wed Oct 26, 2016 1:46 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

I'm reading the temperature values from the accelerometer and trying to make sense of them. The data sheet doesn't provide an example on how to reconstruct the temperature from the data. This is what it says: Both the OUT_TEMP_L (0Ch), OUT_TEMP_H (0Dh) registers must be read. Temperature data is st...
by U.S. Water Rockets
Tue Oct 25, 2016 11:12 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

mhackney wrote:I think you might be right. I've searched and perused Repetier and nothing jumps out. But I will try your suggestion to enable at the end of init.


I'd enable it and do the interrupt clear operation after the init code.

Fingers Crossed!
by U.S. Water Rockets
Tue Oct 25, 2016 9:19 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

I'm taking the direct approach and reading pin 7 directly rather than using the interrupt handler. I'm not seeing any change on the pin at all. I'm going out on a limb and suggest that there's code after the INIT code that does something to the registers in the accelerometer and it's not obvious to...
by U.S. Water Rockets
Tue Oct 25, 2016 9:14 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

Yes but I should still see the signal on the scope when I tap the accelerometer "smartly". But I don't. Does the INIT code disable the interrupts, configure them, then enable them? Sometimes this causes spurious interrupts to be triggered. I prefer to do all interrupt configuration with t...
by U.S. Water Rockets
Tue Oct 25, 2016 9:08 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

mhackney wrote:BTW, SeeMeCNC initialize CTRL_REG6 to 0b00000000, so H_LACTIVE = 0 so the interrupt is active high.


I think the way the FET is configured, the actual signal on terminal 7 is the inverse of the INT1 signal.
by U.S. Water Rockets
Tue Oct 25, 2016 8:05 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

Yeah, I'm not seeing anything on that connector pin 7 from the HE280. It must be that the accelerometer is either misconfigured or the interrupt is not getting cleared (although I have code to do that). I got the files. It would appear that on the HE280 board, resistor R10 (1K) is pulling the INT p...
by U.S. Water Rockets
Tue Oct 25, 2016 7:28 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

I PM'd you asking you to email me so I can send you schematics, code, etc. I tried to send to your email on file and it bounced saying your account is over quota. But I have the schematics, data sheet for the accelerometer and my sketch. My inbox should be clear. You should be able to send the file...
by U.S. Water Rockets
Tue Oct 25, 2016 7:05 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

@ US Water Rockets - the good news is, with the new PCB that SeeMeCNC sent me (got it yesterday) I am now seeing the accelerometer on I2C with no problem - see my post on the previous page. I was excited about that, I think the common ground issue was the root of the problem along with a perhaps no...
by U.S. Water Rockets
Tue Oct 25, 2016 4:42 pm
Forum: Mods and Upgrades
Topic: Interfacing to the new HE280 accelerometer...
Replies: 130
Views: 8493

Re: Interfacing to the new HE280 accelerometer...

I've done enough with I2C to feel comfortable that I can help you get this working. I'll admit to having way too much experience with I2C, and troubleshooting. I use a barometric sensor from the same family as the senor on your breakout board for my rocket altimeter design, so I have I2C working in ...
by U.S. Water Rockets
Mon Oct 10, 2016 3:56 pm
Forum: Rostock MAX v3
Topic: HE280 temperature steady state error
Replies: 5
Views: 520

Re: HE280 temperature steady state error

I had this issue because I calibrated in the middle of the summer on a really hot day and the A/C wasn't really stabilized in the room, when the winter came the ambient was a lot cooler at times and the hot end would not get up to where it was supposed to be. I recalibrated the PID in the cooler tem...
by U.S. Water Rockets
Thu Oct 06, 2016 4:45 pm
Forum: Members Marketplace
Topic: Ball-Cup rod ends for Trick Laser CF Arms
Replies: 7
Views: 1041

Re: Ball-Cup rod ends for Trick Laser CF Arms

Brian, Those look great! I have one question... I had a set of your Carbon Fiber Traxxas ball cup arms and I switched out to try the SeeMeCNC arms with the white barbell ball cup arms. I remember I had to change the radius in the firmware for the SeeMeCNC arms. If I put your CF arms with the Traxxas...
by U.S. Water Rockets
Thu Sep 29, 2016 1:09 pm
Forum: Troubleshooting
Topic: V3 PEEK Fan Running Constantly
Replies: 7
Views: 779

Re: V3 PEEK Fan Running Constantly

It's not a PEEK fan - there's no PEEK in the hot end. :) The fan does (and should) run constantly as there aren't enough wires to control the cold-section fan separately. g. Since you are running I2C to control the accelerometer, what are the chances of doing a future variation of the HE280 that cu...
by U.S. Water Rockets
Fri Sep 23, 2016 10:39 am
Forum: Members Marketplace
Topic: Ball-cup rod ends for CF arms just arrived
Replies: 7
Views: 744

Re: Ball-cup rod ends for CF arms just arrived

What kind of plastic are they made from? My slight OCD makes me wish these were a neutral color like black/white/silver so I'd be interested to know if they were made from something I could use a black plastic dye on.
by U.S. Water Rockets
Wed Sep 21, 2016 11:31 am
Forum: Rostock MAX v2
Topic: HE280 Wire Harness
Replies: 6
Views: 673

Re: HE280 Wire Harness

From the wiring it looks like the hot end fan is no longer shut off when the hot end had cooled, and there are LEDs which are also on when the machine is on and cannot be shot off. Am I missing something?
by U.S. Water Rockets
Thu Sep 08, 2016 3:13 pm
Forum: General Announcments
Topic: HE280 Hotends now on the website
Replies: 31
Views: 4430

Re: HE280 Hotends now on the website

Also, what effectors are compatible with the HE280? I just ordered a 713maker aluminum effector. Would that work? How do all the fans mount?
by U.S. Water Rockets
Thu Sep 08, 2016 3:12 pm
Forum: General Announcments
Topic: HE280 Hotends now on the website
Replies: 31
Views: 4430

Re: HE280 Hotends now on the website

I'm tempted to get one ASAP, but would also be interested in the rumored V2->V3 Upgrade kit. In that case, if I get the HE280 now, then I wouldn't need one with the upgrade kit, and I'd end up with 2 HE280's. Would the upgrade break out the various parts so I could get the HE280 right now and then n...
by U.S. Water Rockets
Fri Aug 26, 2016 1:52 pm
Forum: Rostock MAX v3
Topic: Rostock MAX v3...
Replies: 108
Views: 9393

Re: Rostock MAX v3...

geneb wrote:I just checked and while the E3D nozzle is longer, it does fit.

g.


That's cool. The old nozzle design had that metal cylinder that protrudes behind the threads. Glad to see the new one is more standard.
Thanks.

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