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Thread: Itty Bitty Double Extruder
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12-03-2014, 05:01 AM #41
- Join Date
- Nov 2014
- Location
- Orange, CA
- Posts
- 78
I have been thinking of adding code to merlin to move Y and pulse an output pin at a settable Z interval like every 1mm for clean timelapses what do you guys think..
Ramps 1.4 has servo headers servo 1 is also tied to D11 I think not check in a long time . All output pins from the avr are 5v that's why it's best to use mosfet and stuff rated for use with logic voltage..at 5v you can get away without but at 3.3 or 1.8v you must them or switchthem off high rail using a darlington pair
If you want a custom fan expansion board just ask
Side note testing halleffect endstop modied with 10 turn pot and ref vreg and filtering works amazing so far and you can hide it 1/4 turn = .008mm ZLast edited by TechMasterJoe; 12-03-2014 at 05:19 AM.
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12-03-2014, 06:23 AM #42
- Join Date
- Apr 2014
- Location
- Atlanta, GA
- Posts
- 6
Thanks TechMasterJoe. So to connect the servo all I need do is run a 5v/GND pair from any source (e.g. the ramps 5v pin or a 5v wart if the servo draws too much power, assuring a common GND inthe latter case) and simply connect the D11 signal from the ramps (or fan adapter) to the servo. Easy. The fan needs some type of transistor; the Geetech looks like it has a dual power mosfet on it to do the job, but it would also be a simple matter to breadboard up a mosfet and a couple resistors for the job. One thing I noticed about the Geetech was that there isn't any diode to handle the negative spike voltage from the fan when is switched off. Should there be?
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12-03-2014, 09:45 AM #43Bambu P1S/AMS
NVision4D http://nvision4d.com
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12-03-2014, 10:07 AM #44
- Join Date
- Aug 2014
- Posts
- 24
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12-03-2014, 03:35 PM #45
Yes. The connections are all correct. I'm using the MakerFarm fan extender, which is manufactured by RepRapDiscount. It has a dual buffer driver and a jumper to provide 12v power. It has two fan channels, on D4 and D5, but it covers all four servo pins. I soldered a header with three pins to the D11 pins on the top of the fan extender, and that's where I plug in the servo. The only connections on the board are D4/D5, so the other two are available--just covered. It would be awesome of they used a wire wrap socket so the pins extended out the top for this purpose.
I didn't make any changes to the firmware. I can check my local repo and provide my config files later tonight. I'll also upload my custom GCODE. I don't have access to that machine right now.
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12-03-2014, 03:37 PM #46
Here's a link to the RRD fan extender, which I believe is the one MakerFarm sells: http://www.reprapdiscount.com/electr...-extender.html
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12-03-2014, 03:39 PM #47
I have all the parts for the hardware kits ordered and in transit. Hopefully, I'll be ready to ship later this month.
Of course, US customs clearance can be sketchy this time of year.
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12-03-2014, 04:02 PM #48
Thanks for this design 'clough42.' This has changed my life as much as autoleveling did. Let me tell you, if you've never printed dissolving support, it's the "BOMB." Wow.
I print small and complex parts frequently and spend hours digging out support material and using a dremel to clean them up. I even ordered this tiny hobby sander that has a sanding foot that's 15mm square and uses adhesive sandpaper pads to sand support imperfections down in skinny places. I just printed a test that had a long overhang of a plane that was 3mm from the one below it. It would have been really hard to dig that support material out. I dissolved it out in a cup of hot water in about 30 minutes.Bambu P1S/AMS
NVision4D http://nvision4d.com
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12-03-2014, 04:22 PM #49
- Join Date
- Nov 2014
- Location
- Orange, CA
- Posts
- 78
you guys are ok with soldering i can remake the board to supply both 2 servos and 2 fans
i will take care of the SMD soldering and include wire-wrap and reg headers..
just an offer
i must tell you that i order PCB's from OSHpark so they are a deep purple PCB..
they make amazing PCB's for low cost compared to all the others.
i don't know what filament you guys use but i been using
toybuilders prototype supply stuff and been very happy. print so clean (get it on amazon)
i store my filament under 15-20in of vacuum
for moisture free filament. and no i have never had a problem with a new roll
but old rolls after sitting awhile pop a lot tell i put them under a vacuum overnight
so if anyone wants a dual fan + dual servo board with beefier mosfet drivers for fans and servo power switching (no power no twitch it bugs me) reply with a yes
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12-03-2014, 07:53 PM #50
- Join Date
- Jul 2014
- Location
- Eastern Colorado
- Posts
- 536
Hmm, that RRD fan extender seems to be plugged into the same pins I use to run my RAMPS fan. How many pins I'm currently using are going to be eaten up by this thing?
New Here, don't print but need a...
06-20-2024, 12:18 PM in General 3D Printing Discussion