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Messages - dragonlost

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1
DIY AstroEQ / Re: wrong angle
« on: August 17, 2016, 10:52:59 »
Thank you for the quick reply !

I tried to very low speeds and the angle remains strictly the same.
For jumping steps of stepper motor I do not think that's it because the actual angle have to be smaller than the angle required.

I'll check the gear pulleys

2
DIY AstroEQ / wrong angle
« on: August 17, 2016, 00:37:37 »
Hello.

I have a problem angle applied by astroEQ.

I have a GP2.
stepper motor 400 steps
pulley 1: 4
Worm: 1: 144
mega 2560 r3 + 2x drv8825


when I move the axis of declination (or ascention right) of 90 ° according EQmod, the shaft rotates 110 ° (measured on the frame).

I have verified the number of turns per revolution calculated in the interface and is well calculated.

By introducing an angle 3.23676323 pulley ratio is nearly equal to 90 °.

I do not understand why I have this error? Thank you for your help.

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