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Beta Firmware Releases / Re: [Completed] AstroEQ 8.0.3(beta)
« on: February 21, 2016, 23:44:38 »@Jagho
I wonder if the lower supply voltage coupled with transients created by the motors is causing the +5V line to drop out and reset the ATMega.
OK, Tom,
I'll try to increse the voltage to 10.8 V (max for DRV 8834) and see what will happen.
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Beta Firmware Releases / Re: [Completed] AstroEQ 8.0.3(beta)
« on: January 31, 2016, 09:11:05 »
I've got some progress, after firmware updating.
So, there's not "...EEPROM Blank or Corrupt!" message and even EQMOD is working properly and slewing but only some 30-40 seconds. Suddenly, it stops and there's no reaction like in the previous TEST 2.
I still have these 1-2 seconds sounds from motors while turning on the system. It's not a problem but I mention this because it perhaps may be a clue (or not
)
DRV8825 board with DRV882x config settings still works properly.
So, there's not "...EEPROM Blank or Corrupt!" message and even EQMOD is working properly and slewing but only some 30-40 seconds. Suddenly, it stops and there's no reaction like in the previous TEST 2.
I still have these 1-2 seconds sounds from motors while turning on the system. It's not a problem but I mention this because it perhaps may be a clue (or not
)DRV8825 board with DRV882x config settings still works properly.
3
Beta Firmware Releases / Re: [Completed] AstroEQ 8.0.3(beta)
« on: January 30, 2016, 23:17:45 »
Oh, I see, Tom.
I'll try to do so tomorrow and let you know.
I'll try to do so tomorrow and let you know.
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Beta Firmware Releases / Re: [Completed] AstroEQ 8.0.3(beta)
« on: January 30, 2016, 17:41:37 »
Yes, I've got AstroEQ7-ConfigUtility.zip file from the first post of this thread.
otherwise I would not be able to set DRV8834 in the firmware.
otherwise I would not be able to set DRV8834 in the firmware.
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Beta Firmware Releases / Re: [Completed] AstroEQ 8.0.3(beta)
« on: January 30, 2016, 16:04:44 »
Test 1
I was testing 7.5 version with DRV 8825 first. Everything seems to work fine like @ 7.4 version
Test 2
I changed DRV8825 to DRV8834 on the board and changed DRV882x to DRV8834 in the firmware.
Power supply - 8 volts. Vref = 0.65V for my 1.4A stepper motors.
The first strange effect - stepper motors sound is heard BEFORE I run EQMOD (when I turn on the computer or plug USB). This sound takes only 1-2 seconds. Then I turn on EQMOD, another 1-2 sec. noise. Now, I have got EQMOD panel and I try to move S,E,N or W. Nothing happens. Even the RA and DEC coordinates on EQMOD window are not reacting to my pressing.
When I try to run AstroEQ Firmware Update Utility again. I've got messages: "Read Suceeded. EEPROM Blank or Corrupt!" and then "EEPROM Repaired. AstroEQ Ready for Configuration."
Test 3
DRV8834 on the board but I changed DRV8834 to DRV882x in the firmware. It "works" but motors sound very strange, louder and it seems to me the mount is slewing little slower.
I was testing 7.5 version with DRV 8825 first. Everything seems to work fine like @ 7.4 version
Test 2
I changed DRV8825 to DRV8834 on the board and changed DRV882x to DRV8834 in the firmware.
Power supply - 8 volts. Vref = 0.65V for my 1.4A stepper motors.
The first strange effect - stepper motors sound is heard BEFORE I run EQMOD (when I turn on the computer or plug USB). This sound takes only 1-2 seconds. Then I turn on EQMOD, another 1-2 sec. noise. Now, I have got EQMOD panel and I try to move S,E,N or W. Nothing happens. Even the RA and DEC coordinates on EQMOD window are not reacting to my pressing.
When I try to run AstroEQ Firmware Update Utility again. I've got messages: "Read Suceeded. EEPROM Blank or Corrupt!" and then "EEPROM Repaired. AstroEQ Ready for Configuration."
Test 3
DRV8834 on the board but I changed DRV8834 to DRV882x in the firmware. It "works" but motors sound very strange, louder and it seems to me the mount is slewing little slower.
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DIY AstroEQ / Re: Astoeq tracking pause every seconds.
« on: November 17, 2015, 17:24:05 »I was wondering what would happen if I use a 5v power supply for the steppers instead of 12v? Would this improve the microstepping? or the diode solution is my only option? If the 5v power supply would improve I can buy one with the fitting male connector.
The mimimal power supply for DRV8825 stepper motor controller is 8.2V, so it will not work for 5V, I suppose.
DRV8834 could be the solution - power supply 2.5 - 10.8V - but we have to wait for Tom's firmware update.
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DIY AstroEQ / Re: Astoeq tracking pause every seconds.
« on: November 16, 2015, 12:26:00 »
Thanks Tom, I'll be waiting.
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DIY AstroEQ / Re: Astoeq tracking pause every seconds.
« on: November 14, 2015, 21:05:36 »
I've got the question for Tom. I've found DRV8834 Low-Voltage Stepper Motor Driver Carrier:
https://www.pololu.com/product/2134
Is it possible the simple replacement with DRV8825 ?
... and could it solve the problem low voltage motors (1/32 microstepping) like mine (3,6V 1,4A),
because I can use lower supply voltage.
https://www.pololu.com/product/2134
Is it possible the simple replacement with DRV8825 ?
... and could it solve the problem low voltage motors (1/32 microstepping) like mine (3,6V 1,4A),
because I can use lower supply voltage.
9
DIY AstroEQ / Re: Astoeq tracking pause every seconds.
« on: November 14, 2015, 13:23:14 »
Hi,
I have the same problem with 3,6V 1,4A motor.
I HAVE to keep 1/32 microstepping, so what do you think about the solution with the diodes ? You said "diodes are very hot". Why not using TO220 and radiator. Isn't it the best and the simplest solution ? Unless there were something more than hot diodes. Cedric02, you were testing it. What do you think about it.
What diodes you used ?
I have the same problem with 3,6V 1,4A motor.
Change the motor is the best solution if you want keep the 1/32 microstepping.
I HAVE to keep 1/32 microstepping, so what do you think about the solution with the diodes ? You said "diodes are very hot". Why not using TO220 and radiator. Isn't it the best and the simplest solution ? Unless there were something more than hot diodes. Cedric02, you were testing it. What do you think about it.
What diodes you used ?
10
AstroEQ Support / Re: Connection error
« on: September 15, 2015, 11:13:59 »
OK, I see.
Thanks for your explanation.
Thanks for your explanation.
11
AstroEQ Support / Connection error
« on: September 15, 2015, 10:37:38 »
Hi,
I ran the AstroEQ with the Gemini G-40 mount. It works great ! Thanks for your advices, Tom, but I have a little problem from time to time. When I start the system and EQMod I get connection error. Not always, sometimes.
I disconnect USB and power cable and connect them again. Power first and then USB and everything works fine.
I look at the scheme. I think to power PIC 18F14K50 from 78L05, not USB. Could it help ?
Jarek
I ran the AstroEQ with the Gemini G-40 mount. It works great ! Thanks for your advices, Tom, but I have a little problem from time to time. When I start the system and EQMod I get connection error. Not always, sometimes.
I disconnect USB and power cable and connect them again. Power first and then USB and everything works fine.
I look at the scheme. I think to power PIC 18F14K50 from 78L05, not USB. Could it help ?
Jarek
12
Mount Support / Re: Gemini G-4x mount
« on: May 24, 2015, 21:03:17 »
Thank you very much, Tom,
and as to setting current limit, I should use the method described in FAQs ?
or there is a better way ? I have some tools, oscilloscopes, multimeters etc.
Best regards
Jarek
and as to setting current limit, I should use the method described in FAQs ?
or there is a better way ? I have some tools, oscilloscopes, multimeters etc.
Best regards
Jarek
13
Mount Support / Gemini G-4x mount
« on: May 24, 2015, 16:03:56 »
Hi All,
I'd like to use AstroEQ for Gemini G-40/G-42 mount. G-42 manual says, that you can "use any other controller that can drive bipolar stepper motors with at least 1A/phase". AstroEQ (DRV8825) can drive this steppers easily, I think. G-4x is Direct Drive System (main gear 432). My question is. What are the proper settings of AstroEQ for this mount ?
There are settings for other controllers:
http://www.jgao.pl/pliki/setupg40.pdf
There are other controllers for Gemini G-4x/5x (e.g Pulsar) but there are much more expensive and not better then AstroEQ.
I'd like to use AstroEQ for Gemini G-40/G-42 mount. G-42 manual says, that you can "use any other controller that can drive bipolar stepper motors with at least 1A/phase". AstroEQ (DRV8825) can drive this steppers easily, I think. G-4x is Direct Drive System (main gear 432). My question is. What are the proper settings of AstroEQ for this mount ?
There are settings for other controllers:
http://www.jgao.pl/pliki/setupg40.pdf
There are other controllers for Gemini G-4x/5x (e.g Pulsar) but there are much more expensive and not better then AstroEQ.
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