Search:

OK, I tried something else. With the indexer driving the motor, I tried to stop the motor by hand (I have a small handle attached to the shaft extension). Not particularly difficult. I then connected...

I haven't disconnected it but your suggestion did give me an idea. I loosened all the screws assembling the motor mount/coupling and gradually tightened them evenly while checking the rotation. That...

I don't doubt it at all. I'm sure I ought to have plenty of oomph with my setup. What size and holding torque is your motor? Also, what RT size are you using (mine is 6")?

I thought that at first (I was using a 19V 2.6A supply) so I switched to a 24V 3A supply. It didn't really help. Even with a loose engagement of the worm the motor still stalls at one point in its...

I do, but it's also marked on the driver housing itself. I got back to this after along absence and found the switches set for 20 microsteps (motor is 200 steps). I had also set the worm ratio to 900...

Can you expand on that NNEast? Those two statements would seem (to me) to be contradictory. i.e. there was nothing on the data sheet to even remotely indicate that all switches should be left on -...

Thanks, Kwackers. While I was mulling it over, I decided to go ahead and buy the new, programmed 4520 and, since there were some changes to the PCB I went the whole hog and bought the full PCB kit....

Yes, it does have the "Set Worm Ratio" and I didn't notice that that was *instead* of the "Steps for 360". That being so, and since I already have the worm ratio set for 90, I'd better check the...

I built my indexer some years ago with a home-made PCB and local parts and thought I had it working at that time. I hadn't had reason to use the rotary table in the meantime (except for "quickies"...

That's bad advice. Stick with what you thought (24V 2A).

Take a look at http://www.geckodrive.com/upload/Step_motor_basics.pdf

Read it all if you want the theory or read the section on power...

Thanks Kwackers!

Actually it says "Any fast switch diode".

I wouldn't know whether the 1N4148 is considered fast these days or not - which is why I asked.

Anyone?

There are two BYV27 diodes listed in the parts list for optional areas of the PCB (Beeper and Sense/Ack). I can't scare up any of those but I do have a ton of 1N4148. Would that do?

Toner transfer then. Nice looking board anyway. I've tried Press-n-Peel and several of its derivatives and never managed to get a good board. So I stick to the photo method now. I guess some people...

Roy, it looks correct to me.

What drill size did you use?

How did you make the board, toner-transfer or photo method?

After a few failures using the toner transfer method I finally tried one using the photo method and got a truly excellent PCB first time.

Now I have to drill it. What's the best drill size(s) to...

Click on "User CP" (up at the top) then "Edit Options" and you can change the message display to whatever works for you.

I have a bmp of PCB 2.0 which is printing just fine for me. A lot depends on the graphics program you're using. I presume you've checked throughout the printing chain (graphics program, printer setup...

Thanks, John - I'm compiling the order now.

OK, thanks - I'll try that.

Sid H.

Hi John W

I'm in exactly the same boat - I'm in Canada and can't find a source for the 18F452. I have the pdf version of the 3" thick DigiKey catalog and did a search in acrobat but couldn't find...