Mariss, why does a stepper driver operating at X-amps per phase only require 2/3 supply current? Also, do you state "phase-current" in terms of peak, average...
... This is common to most switchmode supplies operating into some sort of inductive load: it is the POWER which is equated, rather than the CURRENT. For...
... The Gecko PSU only needs to supply the average power required by the motor (plus a little more to account for losses in the circuit), because it uses a...
John, For the second part. We state the current in "peak" not "RMS" amps. Here's why: The 2 motor windings do not share a common flux path. You can prove this...
I don't know if anyone will have any alternatives, since with this project we'll be making many of the G2002/G2003 devices, but I need to get my hands on a...
... The above got me wondering: do the drivers increase voltage at higher RPMs to compensate for winding inductance? Or is this achieved "automatically"...
In a message dated 3/3/2003 8:39:50 PM Central Standard Time, ... SJH: At the risk of stickin' my nose in where it shouldn't be, the voltage is NOT regulated...
Steve, Indirectly, yes. The drive presents itself as a sine-cosine weighted current source. A current source will output whatever voltage is necessary to keep...
Thanks Mariss, one last quick question. I picked up a 22,000uF 40VDC Max surge 50VDC cap. Is this adequate? Maybe I should use my 24v side instead? Thanks...
From: Carlos Guillermo <carlos@v...> Date: Fri Mar 7, 2003 11:28 am Subject: USB 2.0 CNC control and high speed stepper driver ADVERTISEMENT Interesting...
http://www.marketplace.nl/sensa/index.html I noted things like a 1.2KW output from a NEMA 23 motor, 160V power supplies and their newly invented "no energy ...
I called the company yesterday, and they use steppers and rout with a continous speed 12 m/min, to do this they use there own drivers, which doesn't work with...
Mariss, noticing your use of large ceramic caps. I'm faced with specifying these on a project and can't come to a conclusion as to what dielectric is best. The...
John, I originally specified 4.7uF tantalum caps. These were replaced with 4.7uF ceramics when the great tantalum powder shortage occured a few years back and...
Mariss, I hear you, with regard to tantalum. Not to mention the requirement to spec. voltage X2 with ' tant '. I've only continued their use in replacement of...
John, It's worse than that. Y5V has a +80%/-20% tolerance at 25C. Capacitance drops fairly linearly from this value to 30% at 85C, which is the max rated...
Just had to chime in on this one... Make a good product. Provide value for the dollar. Don't force users into situations where they cannot swap hardware and...
... errr .. right, so by the same token, I make a machine that uses G201, some people are just buying G201's and building copies of the machines, pleas stop...
This is an old topic. I got my head kicked in the first time around so I put up a white flag and unconditionally surrendered. The G2002 and G2003 will be...
rszemeti; Perhaps you haven't read the follow up posts to this rather old thread. Your message has long since been conveyed rather clearly. It would be...
... The short answer is "we don't know". The few anecdotes I can relate are: 1. IIRC more than 500 BDI disks have been sent out. Of course some are upgrades...
... it is? weird it was right at the top of the archive .. still hey ho :) so long as the message has got through thats what counts :) .. I'm very much looking...
Hi, New to the group. I have a servo controller built up with Gecko 320 drivers. I am trying to tune the drivers with an oscilloscope and I'm having a bit of a...
I am having trouble getting a response to step signals sent to the 320. The 320 faults out when the rotor is turned in either direction just like it is suppose...
Make sure the +5VDC need on terminal 12 (Common) comes from your step pulse / direction source, not from terminal 7 (Enc+). Mariss ... direction ... o...
I am using the ground from the parallel port. Which is also where I get my step and direction. ... step ... <kdoney_63021@y...> ... the ... is ... by...
The STEP and DIRECTION opto LEDs are "pull-up" loads. The COMMON (term. 12) must be connected to +5VDC from your PC. Without that the LEDs cannot carry any...
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