AstroEQ Discussion Board

AstroEQ Forum => AstroEQ Support => Topic started by: williamge on March 04, 2019, 09:40:44

Title: Error in configuration of AstroEQ board( TMC2208 EQ3D 1.8 stepmotor)
Post by: williamge on March 04, 2019, 09:40:44
dear every one

I made  a board of a MEGA2560 motherboard,  the driver used TMC2208. According to the following configuration, the RA axis of EQ3D cannot be  tracked and    fail to  slewing

                           RA            DEC
Motor Step Angle   1.8            1.8
Motor Gear Ratio   81/9    :1      2.333333
Worm Gear Ratio   130    :1         65
Microstepping           16            16                TMC2100/  faster slew on
               
TOTAL Steps         3744000         485333.3333
Worm Steps         28800            7466.666667

Manually set the rotation Angle of the ra axis for 6 hours. The equator will only rotate by 10-15 degrees.
When tracking stars,  i need to set the 7x rate to track properly
DEC axis setting was working right

whats my problem there? what i missed ? 
Title: Re: Error in configuration of AstroEQ board( TMC2208 EQ3D 1.8 stepmotor)
Post by: williamge on April 02, 2019, 09:39:30
@Thomas can you  help me please~
Title: Re: Error in configuration of AstroEQ board( TMC2208 EQ3D 1.8 stepmotor)
Post by: TCWORLD on April 03, 2019, 00:01:36
TMC2208 isn't one of the drivers I've tested.

I've just checked and its mode select pins have very different meaning from the TMC2100, so it's no wonder it is not tracking at the correct rate.

I would need to add support to both the config utility and the AstroEQ firmware in order to support those drivers.
Title: Re: Error in configuration of AstroEQ board( TMC2208 EQ3D 1.8 stepmotor)
Post by: williamge on April 06, 2019, 06:39:57
TMC2208 isn't one of the drivers I've tested.

I've just checked and its mode select pins have very different meaning from the TMC2100, so it's no wonder it is not tracking at the correct rate.

I would need to add support to both the config utility and the AstroEQ firmware in order to support those drivers.


thank you every much~ @TCWORLD
TMC2208 is cheaper and not hoter than TMC2100
thanks your great work ~~~~
Title: Re: Error in configuration of AstroEQ board( TMC2208 EQ3D 1.8 stepmotor)
Post by: williamge on April 18, 2019, 14:28:41
TMC2208 isn't one of the drivers I've tested.

I've just checked and its mode select pins have very different meaning from the TMC2100, so it's no wonder it is not tracking at the correct rate.

I would need to add support to both the config utility and the AstroEQ firmware in order to support those drivers.
can i connect the mode select pins ms1 and ms2 on tmc2208 to high volt ,  useing tmc2100 config without ustep change ?
i find out tmc2208 is more silence then tmc2100 (i bought two tmc2100)
Title: Re: Error in configuration of AstroEQ board( TMC2208 EQ3D 1.8 stepmotor)
Post by: williamge on April 18, 2019, 15:25:04
TMC2208 isn't one of the drivers I've tested.

I've just checked and its mode select pins have very different meaning from the TMC2100, so it's no wonder it is not tracking at the correct rate.

I would need to add support to both the config utility and the AstroEQ firmware in order to support those drivers.
can i connect the mode select pins ms1 and ms2 on tmc2208 to high volt ,  useing tmc2100 config without ustep change ?
i find out tmc2208 is more silence then tmc2100 (i bought two tmc2100)


No,i can't , i tested


by the  way  , TMC2100 slew speed only works at 400x, is that right?
Title: Re: Error in configuration of AstroEQ board( TMC2208 EQ3D 1.8 stepmotor)
Post by: TCWORLD on April 19, 2019, 10:23:08
I'll add support in the next release, but with the workload I have at the moment, that may have to wait for a couple of weeks.

Kind Regards,
Tom,