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LFEP problem with motor
palo974:
--- Quote from: palo974 on Saturday, 14.12.13 - 10:10:59 - CET ---Hello,
Yesterday I tested the last update. The clouds wasn't there since a wide.
Usualy, I used to going at 100X for the goto with my CG5 original motors but now i need to fix them donw to 50X.
At 100X, my motor don't work at all, at 50X they work good but it too slow. Between these values motors don't run aconstatilly.
even if the 40V delevery is on.
I didn't change any courants values for the motors.
Did I need to change something?
CS
Patrice
--- End quote ---
--- Quote from: Armando on Sunday, 15.12.13 - 02:08:12 - CET ---Hi Patrice,
--- Quote from: palo974 on Saturday, 14.12.13 - 10:10:59 - CET ---Did I need to change something?
--- End quote ---
Issues related to motor speed are obviously not related to the ASCOM driver in use: you will find the same speed limitation also by using previous releases or by moving the mount by hardware handbox.
Maybe you're using a too low current value for your motor or your battery is not properly charged (if you're using a battery to power your LFEP).
Keep in mind a too low voltage will make V40 board not working: some days ago I started to think my V40 was faulty (I can hear a louder motor noise while V40 is enabled). Then I realized the battery voltage was well under 12V... :)
You can also try to set an higher ramp value, if available.
Another cause of the speed issue could be a low temperature so that an higher load torque is required (e.g. because of bad grease or too small worm-worm wheel play).
Clear Skies!
Armando
--- End quote ---
Hi Armando,
Thanks for your reply. I move to a nex topic.
Yes I have the same behavour with the ASCOM and the hadbox.
It wasn't a problem of main power because I used a 15V laptop power.
I tried different value for the ramp between 10 to 150 but nothing was good.
For the temperature, actually I've got at least 16°C at the morning at 25 m above the sealevel.
We need to go at 2200m to expect to have arond 10°C at night (Réunion island).
And I changed the grease.
I tried value between 600/1200 for the motor.
How can I check the output value. I don't think voltmeter is good for that?
Maybe this is the 40V board because It was the speed of 50X I had before this option.
Thanks for your help because I lost in electronics.
CS
Patrice
Armando:
Hi Patrice,
--- Quote ---It wasn't a problem of main power because I used a 15V laptop power.
--- End quote ---
Ok, first of all check the output voltage... :)
If there is still the need to check V40 board then a voltmeter is enough to check 40V inside the LFEP... ::)
But frankly I think you can simply hear noise coming from RA motor: you should find tracking noise (with no need to send any GoTo command) really louder as soon as you enable V40...
If you were able to move at 100x only with ramp enabled, then keep in mind that ramp starts at backlash speed. Maybe now backlash speed is too high and makes ramp not useful...
CS
Armando
Armando:
Another reason of the issue could be related to speed ramp: some motors are affected by small pull-out torque values around some frequencies.
Setting Goto speed fixed at 100x and playing with ramp_value and starting_ramp_speed (backlash speed) maybe you make the motor not working at these bad frequencies...
CS
Armando
the_lizardking:
Hello Patrice,
when it works with 50x and you tried to change the ramp settings as well as the current or you really did not change anything on the old setting and you cant hear the motor stucking,... you have an absolut unusual problem.
You can try to check with voltmeter and if you have power there check the movements when motors are stripped down. But turn the tracking off - so there should noit be any power when doing nothing and really take out the motors completely. Try one after the other, first voltmeter and then take out the motors.
cheers
palo974:
Thank for your reply.
I try to change value of the setting but It was unsuccessfull
During my tests, I finally had a problem more seriously.
I had a funny smell which is not good just before LFEP is reset.
So I opened the box and outlet plates to visually check the condition of the circuits.
I found a component that overheats and bears signs of this heating.
I enclose you a picture that I have identified the component in question.
Could you tell me what it does and if I can change to solve my problem?
thank you for your help.
Patrice
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