a5 egrip battery voltage problem.
Printed From: Tippmann Paintball
Category: Paintball Equipment
Forum Name: Gun Maintenace and Repair
Forum Description: Important info for keeping your marker in top shape
URL: http://www.tippmannsports.com/forum/wwf77a/forum_posts.asp?TID=192392
Printed Date: 22 December 2024 at 11:15am
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Topic: a5 egrip battery voltage problem.
Posted By: KhitSicker
Subject: a5 egrip battery voltage problem.
Date Posted: 25 March 2017 at 11:12am
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I have am having a weird issue with an old (not hal) a5 egrip. all the modes and firing is working however it seems to be draining the battery very quickly. Testing with a multimeter it took a brand new energizer lithium from 9.6v to 8.4v in less than a minute of full auto firing. left to sit for a couple hours not plugged in and the battery did gain some voltage back but i still can not get more than a minute or 2 of firing before the battery voltage drops below what will make the egrip work properly. I tried it with several brands of battery including a powerex true 9.6v. that one fares better and regains voltage quicker but still in under 5 minutes the e-grip no longer fires due to low battery voltage. any ideas?
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Replies:
Posted By: tallen702
Date Posted: 27 March 2017 at 1:43pm
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Is this 2-5 minutes of continuous firing on full auto? Or is it draining down when not in use? IIRC, the older e-grips really gobbled up batteries. I used to keep extra 9v batteries in my kit and swap out about mid-way through a full day of playing. Not sure if it was resistance from the way the circuit was built, or just that the old microprocessors that were used in them ate up that much more power, but they'd chew through batteries fairly quickly. Mind you,d 2 minutes of sustained full-auto fire is a pretty significant amount of power, you are basically powering an electromagnet every time it cycles. ------------- <Removed overly wide sig. Tsk, you know better.> |
Posted By: KhitSicker
Date Posted: 31 March 2017 at 10:37am
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the first test was 2 minutes of constant full auto. but over the last couple days i have been testing with short bursts then maybe comming back in an hour and firing another burst. it did better. But i didnt ever get more than 10 minutes of "firing time" Would replaceing the board with an APE board be advised? My a5 has been modified to fit in a p90 shell and I don't think the way I have it setup a HE e-grip board would work properly. |
Posted By: tallen702
Date Posted: 31 March 2017 at 11:47am
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APE boards work pretty well and should give you slightly better battery life, especially given the programming parameters that allow you to adjust rates of fire more finely. That said, the inherent drawback to a "sear tripper" system like e-grips vs a true electropneumatic firing system (ie, FASR or Spool valve setups) is that the electromagnetic armature that actuates the sear eats up a LOT of power. It's not the board draining your battery, it's the armature. That's the "engine" of the e-grip system. 10 minutes of firing time with burst and full auto is a lot of rounds down range BTW. 7,800 rounds if you're capped and feeding at 13bps which is the top end of what most fields allow. That's $155.80 worth of Empire Hot Box (their cheapest paint) per battery charge. The only time I ever went through that much paint in a day was during high level tournament play and even then, it was just barely and I expected to fill my tank and change my batteries multiple times throughout the day (between every match actually). The max most people carry on them into the field is 1000 rounds (8ea 150 round pods in a pack), so even with a 2 minute full-auto-all-the-time lifespan, you're still talking over 1500 rounds. You literally couldn't fill your hopper fast enough to achieve dumping everything in 2 minutes. Quite honestly, 10 minutes of actual firing is a LOT of firing for a day of play. ------------- <Removed overly wide sig. Tsk, you know better.> |
Posted By: KhitSicker
Date Posted: 31 March 2017 at 1:13pm
| i will run it again when i get home from work and record an exact time. I do have a couple batteries I can hook up in parallel as well. |
Posted By: KhitSicker
Date Posted: 31 March 2017 at 9:30pm
| 2 true 9.6v rechargeable batteries in parallel got 17 minutes of sustained full auto. battery voltage at the start was closer to 10.4v and got down to about 8.8v before the firing became erratic. bps is low though. started at like 8-10 and ended up closer to 5 or 6 ... I suppose it might be cheaper just to get a high capacity airsoft battery or hook up 3 or 4 9v's in parallel. |
Posted By: pasapaca
Date Posted: 21 June 2017 at 2:08pm
| I Have exactly the same problem, I even found a uTube video of a guy with the same issue. Called Tippmann parts and some other 1800 number they gave me, but no one seems to heard about it. From my point of view this must be the motherboard, but they donīt manufacture it any longer. any ideas? |
Posted By: tallen702
Date Posted: 22 June 2017 at 8:47am
I'd go with an aftermarket MoBo from APE or similar in that instance. ------------- <Removed overly wide sig. Tsk, you know better.> |
pasapaca wrote: