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I've personally tested my HP-UHU with a 160VDC supply and I'm running them with 130VDC (though they haven't been used much to be honest) so your 120V motors should be fine from a voltage standpoint....

Hi everyone,
I'm starting this thread in an effort to make anyone concidering the HP-UHU, or any other UHU based drive for that matter, aware of that the servo processor module is now officially out...

Hi Paul,
Nice to hear from you, it hurts me to hear about your healt issues, I hope you'll recover!

For anyone concidering the HP-UHU (or any UHU based drive for that matter) I've got my...

Hi,
There are bypass capacitor across the supply rail very close to both ICs on the PCB if that's what you're worried about. If that's not it then I'm afraid you need to elaborate a bit more about...

Hi,
Yes, I do have modules for sale, the cost is €20/pcs if you buy 3 or more I'll pay the shipping.

I have a limited number of modules "in the field" (around 15). I got one back for repair but I...

Hi,
I can't give you any "real" numbers for size 20 or 25 taper tools. What I did find when designing the spindle was that one manufacturer claimed 3900N while another 5500N for a size 30 taper....

Hi,
I think you need to go to Config->General Config and in the lower right hand corner you tick the option Persistant Offsets. This will save the offsets when you exit. If you also tick the...

Hi,
You get everything you need in the kit, encoder, mounting tools/spacers, connector and shaftadapters it will fit a whole bunch of different shaft sizes and mounting instructions. I beleive the...

Hi,
One source for belts and pulleys are SDP-SI and another one is Technobots in the UK but I'm sure you'll be able to find one a bit closer to you.

The cheapest encoder that I know of is the...

Hi Drools,
Normally the encoder has nothing to do with Mach3. Mach3 doesn't know the difference between steppers and servos - it only sends step and direction signals to the drive and IT drives the...

Hi,
Not that I know of but that doesn't mean none exists...let me know if you find one.

For a low(ish) cost brushless servo drive have a look at the VSD-E from GraniteDevices and the systems...

Hi,
No, you can not run a brushless motor with an UHU based drive. The UHU based drives are meant to drive permanent magnet brushed DC motors (PMDC).

As for voltage and current etc it's...

Hi,
The speed you'll be able to run the motor at is a function of the resolution of the encoder and the step rate that your controller (Mach3, EMC2 etc) is capable of outputting.

If you have a...

Make a copy of one of your existing shortcuts, rightclick it and select Properties. On the Shortcut tab edit the Target field to point to your newly created profile instead of the original one.

Hi Paul,
Sounds like an inch vs metric issue. Not that installing the Smoothstepper should have changed anything but make sure your file specifies either G20 or G21 depending on what you're running....

Hi John,
I'm sorry for making you repeat yourself but are you saying that if you run something like:

M98 P123 L100
M30
O123
G0 X10
G0 X0
M99
The X-axis does not drift but when running arcs...

Hi,
I just read thru this thread and I think there's been a slight misunderstanding (or I've misunderstood).

Anyway, if you DO have differential encoders (ie they output A, A-, B, B-) then by...

Hi,
Lets see...

(256*4) * (24/14) / 5 = 351.0857 steps/mm
351.0857 * 25.4 = 8917.577 steps/inch

That's around 0.5% off from what you get which might be accounted for as pitch error of the...

Sorry I don't know. What's wrong with the name it has? ;-) As far as I know it's just another "standard" like NEMA, ASME, DIN, ISO, etc

Here's a page I found that shows a bunch of different types...

Hi Lee,
This is not something I know for sure so hopelfully someone else either corrects me or confirms. Anyway, I beleive VDI in this context stands for Verein Deutsche Ingenieure which means...

Oh, I didn't know that.

1 inch is 25.4mm, so if you have 200 steps/mm you have 200*25.4=5080steps/inch.

Hi,
If the encoder is 250 counts then it would be 250/5 = 50 steps/unit. If the encoder is 250 lines resulting in 1000 counts then it would be 1000/5 = 200 steps/unit. (At 1:1 gearing)

The kernel...

Hi Eric,
Depends on what you want to use the I/O for. If you want your step- and direction signals to be thru this I/O device then (and if we're talking Mach3) you have a couple of option (in no...

Hi,
The PCB's arrived and I've assembled 20 units ready for programming:

http://i158.photobucket.com/albums/t110/henrols/Modules_1.jpg
...

Hi,
Yep, as have been said before, that's the downside of it all. There is A LOT of valuable info available, it's just that it hard to find when you're not sure exactly what you're looking for.
...

Hi,
You mentioned you are powering the encoder from a bench power supply...
If so you must connect the ground of the bench supply to ground of the main power supply. In other words ENC GND must be...

Hi,
My G210's are 9+ years old and have the opto-isolator in a socket, sounds like yours does as well. If it's an 8-pin device and it says HCPL-2631, HCPL-2531 or something like it then that is it....

Hi,
Have a look at the Step motor white paper published by Geckodrive. Some of it may be specific to Geckodrive products but it covers a lot of general step-motor theory.

Hi,
Sounds like the opto-isolator might be shot. Try swapping the drive with a known working unit just to verify that it indeed IS the drive and not something

You should be able to replace the...

Hi Todor,

Well, I'm afraidf I don't have much news for you.

To be honest I'm a bit frustrated as I've sent out 7 modules (one of which vanished in the post), free of charge, including shipping...