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Old 07-15-2012, 08:16 AM
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Default Lazy 1238R inital acceleration

Hi, Me again:

My Curtis 1238R controller is working pretty well. I just have a couple of issues that don't feel right.

1-From a stop. The first few seconds of acceleration are nothing to write home about. It is something I call "Lazy". It feels like it requires that time to "ramp up" to a decent torque. The AMP draw starts out at 90 then ramps up to 560 or so in 3-4 seconds or there abouts.

Question: What settings in the controller should I check? What should they be?



2-My regen has the reverse problem. I have the paddle lever in my fingers, I can adjust to the road conditions easily. If I grab the lever hard, pull it wide open, the first second feels like I am dragging my foot on the road, then it picks up in 2-3 seconds to a very nice drag. But in no way does it skid the tires on paving.

Question: Is there a delay setting I can set up? It needs to be a little more responsive and I need it to just be at the traction threshold when at maximum.

I hope this makes sense...

Miz
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  #2  
Old 07-15-2012, 09:19 AM
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Default Re: Lazy 1238R inital acceleration

Quote:
Originally Posted by mizlplix View Post
Hi, Me again:

My Curtis 1238R controller is working pretty well. I just have a couple of issues that don't feel right.

1-From a stop. The first few seconds of acceleration are nothing to write home about. It is something I call "Lazy". It feels like it requires that time to "ramp up" to a decent torque. The AMP draw starts out at 90 then ramps up to 560 or so in 3-4 seconds or there abouts.

Question: What settings in the controller should I check? What should they be?




2-My regen has the reverse problem. I have the paddle lever in my fingers, I can adjust to the road conditions easily. If I grab the lever hard, pull it wide open, the first second feels like I am dragging my foot on the road, then it picks up in 2-3 seconds to a very nice drag. But in no way does it skid the tires on paving.










Question: Is there a delay setting I can set up? It needs to be a little more responsive and I need it to just be at the traction threshold when at maximum.

I hope this makes sense...

Miz
You have to understand the 1238 from HPEVS. It is programmed for their motors using all the test data compiled by Curtis during the BETA tests. The non field programmable data put into the 1238 is there to protect the motor and controller. Thats why you dont hear of customers blowing these up. If you want to have full controll of the controller, send it HPEVS and they will re-flash the ROM (about $200+) to Electric car parameters leaving out all the specifics for their motors. Then you can program the controller and attemp to blow it all up. Your reverse should be no differant than forward unless you dont have the programming right.
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Old 07-15-2012, 10:51 AM
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Default Re: Lazy 1238R inital acceleration

Quote:
Originally Posted by ev-converter View Post
You have to understand the 1238 from HPEVS. It is programmed for their motors using all the test data compiled by Curtis during the BETA tests. The non field programmable data put into the 1238 is there to protect the motor and controller. Thats why you dont hear of customers blowing these up. If you want to have full controll of the controller, send it HPEVS and they will re-flash the ROM (about $200+) to Electric car parameters leaving out all the specifics for their motors. Then you can program the controller and attemp to blow it all up. Your reverse should be no differant than forward unless you dont have the programming right.
You could try to be helpful, crusin.
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Old 07-15-2012, 11:00 AM
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Default Re: Lazy 1238R inital acceleration

Quote:
Originally Posted by mizlplix View Post
Question: What settings in the controller should I check? What should they be?
Hi Miz,

I don't seem to have a delay or ramp on the AC15. I'll check parameters Monday or Tuesday. Do you have the programmer?

BTW, if it is battery current you're looking at, it will always start out much lower than motor phase current and build up as the motor RPM increases.

major
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Old 07-15-2012, 04:19 PM
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Default Re: Lazy 1238R inital acceleration

ev-converter:

Thank you for your response. I suggest you go back and reread my post.

1- My reverse and forward do act the same. (I didnt mention about reverse.) I said regen.

2-No mention was made of "trying to blow up anything." I said it was slightly lazy initially.

3- My first statement was "My Curtis 1238R controller is working pretty well. I just have a couple of issues that don't feel right" which was not that I wanted complete control so I could "blow up" anything.

Major: Thank you also. I have the PC software and dongle but not the hand held programmer. Yes, I would appreciate something for comparison. Yes, I was looking at pack current. But, The seat-of-the-pants feel is that there is a deliberately built in gradual ramp up. Again, is OK if it was intended. I just have not heard anyone else mention it.

If this slight delay in accelerating and regen braking is normal, I can live with it, I just was expecting it to be a little crisper. (my only comment)

Thanks again,
Miz

Last edited by mizlplix; 07-15-2012 at 04:35 PM.
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Old 07-23-2012, 06:36 PM
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Default Re: Lazy 1238R inital acceleration

Quote:
Originally Posted by mizlplix View Post
ev-converter:

Thank you for your response. I suggest you go back and reread my post.

1- My reverse and forward do act the same. (I didnt mention about reverse.) I said regen.

2-No mention was made of "trying to blow up anything." I said it was slightly lazy initially.

3- My first statement was "My Curtis 1238R controller is working pretty well. I just have a couple of issues that don't feel right" which was not that I wanted complete control so I could "blow up" anything.

Major: Thank you also. I have the PC software and dongle but not the hand held programmer. Yes, I would appreciate something for comparison. Yes, I was looking at pack current. But, The seat-of-the-pants feel is that there is a deliberately built in gradual ramp up. Again, is OK if it was intended. I just have not heard anyone else mention it.

If this slight delay in accelerating and regen braking is normal, I can live with it, I just was expecting it to be a little crisper. (my only comment)

Thanks again,
Miz
I read your post,did you read my answer? Others understand it.
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Old 07-23-2012, 06:45 PM
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Default Re: Lazy 1238R inital acceleration

Ya Miz I think you need to reread his post (maybe a little slower)
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  #8  
Old 07-23-2012, 08:34 PM
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Default Re: Lazy 1238R inital acceleration

Ya, I re-read it ...It still is no help just like the first time.

Ivan: Stay off the forums and finish your motor.

Miz
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