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Hi I know this is an old old old thread but i also need a manual for this drive if anybody can help?
Thanks

Ceefna

Thanks for the info guys, sounds like that is the problem in there is no back rake on the hob. It is just rubbing its way round as you said and not doing much cutting. Do you think it will be...

Hi, the tool is basically the threaded bar with 4x 1mm wide by about 2mm deep slots ground into it in a spiral.
According to the thread specs the thread height is 0.92 mm, is this the depth I should...

Hi all, I need a bit of help with some worm wheels I am trying to cut.

The gear blanks are 1/2" aluminium and the worm I have made from 20mm x 1.5 threaded bar.

I have attached a couple of...

Yes it's only a 0.75kw motor. I will let you know if the motor performs under load and the issue is fixed. It maybe helpful to somebody else that has an issue with one of these quality ;) inverters....

Looks like it might be sorted :D
I changed the setting PD009 intermediate voltage, says in the booklet it is factory set to 15 but mine was set to 14. Changed it to 15 and now I have got 240v at...

Yes already regretting my chice of inverter:(
Have been through the manual and changed the motor settings, I believe its a 2 pole/ 2830 rpm
The motor is a FFD EMT 80 2A, is there a chance this...

I have tried every combination of wiring the input to the motor but it makes no difference. Tonight I thought I would have a look inside the motor to see if I could see anything wrong, so i started...

What do you mean by miss-connected the 1 & 2 ends?

I have just done some more checks and the inverter is only displaying 38.6V/0.04A at 50Hz, think this maybe the problem. When I test the voltage...

I had to get a terminal block for the motor because it didn't have one on when i got the motor so I was not shure I had fitted it correctly.

The motor does nothing when the inverter is switched on...

Hi Al, I have 3 phase 220v going in on U1, V1 and W1. Because the terminal block is new the markings on the terminal block are not in the same order as the markings on the cover.
Does it matter...

Hi all, I could do with some help on my motor wiring.

The motor is a 1hp 220/415v 6 pole/3 phase.
When I got the motor the terminal block, I have fitted on but I am not sure if the windings have...

Hi guys,
Problem Solved, there is nothing wrong with the board.

It was motor over run because I was bench testing all the components with no load on the motors it must have been getting an...

The 7805 voltage regulator feels quite warm?
I swapped it yesterday but it made no difference, could it be a component power supply problem rather than a faulty component?

ceefna

I don't think the link to the schematic was working.
Here it is again.

http://www.dd1us.de/Downloads/Schematic%20of%20a%20NexStar%20SLT102%20motor%20control%20board%200v2.pdf

Ceefna

Thanks Al,
I will check both inputs are low and there is also an input at pin2.
If there is no input at pin 2 I will have to trace back to the next component.

Ceefna

Thanks for that, the other build was very successful.

I will have a probe about and see what I can find.

Ceefna

Hi Doorknob, how are you doing?
You are right I did buy a scope but I really have no knowledge on how to use it.

Is it safe to go probing around on the board? can I do more damage than I already...

PDF working fine here, hers are 2 screen shots with logic info and pin numbers.
Am I right that I need to test the input at pin 2(for output pin18).

Can I test with an led or multimeter?

Ceefna

I have checked input at pin 7(that is azimuth motor turn right input) on the 293 and when the fault is happening it has no input. Pin 7 is linked to pin 18 on the 74HC240D octal buffer and there is...

Hi, the chip is a L293DD, it's not getting hot at all. I have tested the signal into the L293DD when the delay is happening and it has no signal so I am thinking that the L293DD maybe ok? or could it...

Hi Roman,
Thanks for the reply, I think the two micro controllers are there because it is an altitude and azimuth type mount so it needs to beable to mowe both the motors at the same time for...

Hi Guys

I am such an idiot, I was testing the logic supply voltage on the L293 between pin 20 and ground (pin 16 on the schematic)and I had my multimeter plugged into amps and shorted something,...

Hi Roman,
I appreciate all the help you gave me with the camera tracking mount. It works like a dream. I have a problem that I could do with some help on. I know you said it wouldn't be right to...

Hi all, I am wanting some help to build a simple and more importantly cheap speed controller for a 240v 50Hz single phase 2 pole .55kw motor.
I have found a circuit on a ST semiconductors pdf(page...

Hi, the celestron brain has the coordinates of over 4000 astronomy objects in its memory. You align the telescope to 2 stars and input their positions. From this the software knows where the...

Hi James, the page is great :D your Java script calculator is brilliant, good idea to show the line of code so people don't get confused with decimal places.

Have a look at your youtube comment I...

Here is the video James, did my best really don't like talking on film :)
Let me know if it is ok.

Home Made Astro Photography Mount with LiniStepper Driver - YouTube
Also here is a modified...

I was thinking I would need 4 FET's with dides to control the 2 motors in forward and reverse. I really don't want to start changing the PCB so an addon if it will work would be the best solution.
I...

I am going to get some pointers written down for the video. Beware I'm no Johnny Depp :D

The L298 is not a pin for pin replacement but from what i can gather pins 2+19 current sense if not used...