Hi All, I can test my board by using the test program from velleman. (Nornal) I am using Windows 98 SE on Laptop Thinkpad 600E. (still normal) I have the K8001...
364
Vladimír Grúl
vgrul@...
Jan 3, 2002 12:12 pm
From Philips documentation: Addressing of PCF8574: S 0 1 0 0 A2 A1 A0 0 A Addressing of PCF8574A: S 0 1 1 1 A2 A1 A0 0 A S - start bit A2 .. A0 -...
Hi... I just recieved a email pointing to new software for the Velleman K8000.. Looks very good.. *Power WinPLC Professional 2002.* Made by Bart Vanderhaegen. ...
... I have asked velleman about the K8013. They say they never designed or produced the k8013 Appearently the Velleman K8013 does not exist. It toke me a while...
367
Stephen Messenger
stevem@...
Jan 4, 2002 1:17 pm
Have you thought of the PCF8575, it does the same job as the 8574, but is 16bit instead of 8. This may halve the number of 8574's you need, and save some...
Hi.. There have been questions about controlling the K8000 via internet. The maker of WinPLC has done something with it. A telnet prog. Not yet completed. ...
369
Vanderhaegen Bart
bartv@...
Jan 5, 2002 11:56 pm
Hello, I've seen questions are asked about if it is possible to control the K8000 over a network. The answer to this question is simply YES. For this reason, ...
... The link does not work.. I think it is the point at the end which causes the problem.. Lets see :-) http://groups.yahoo.com/group/winplc...
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Vanderhaegen Bart
bartv@...
Jan 6, 2002 12:08 am
... http://groups.yahoo.com/group/winplc Indeed, little (huge) mistake of me. Thanks Bart...
372
johan@...
Jan 6, 2002 10:10 am
... Hi Bart. if the link ;) and the software really works... I'm going to send you some flowers! I want to control it (through the web) for a long time. I'm...
... Don't know, but, wouldn't it be possible to modify the K8005 driver circuitry to make it handle more current? Using different spec components, extra...
377
johan@...
Jan 6, 2002 11:43 am
... From: "Vanderhaegen Bart" <bartv@...> To: <k8000@yahoogroups.com> Sent: Sunday, January 06, 2002 12:56 AM Subject: [k8000] Controlling the K8000...
... Maybe.. You would need to replace at least T1, T2, T5, T6, T7, T8, T11 and T12. And propably R30, R31 and all 12 1N4007 diodes A major opertation.. And...
... Further down the thread I heard someone was working on it, so I won't bother trying. I don't have a K8005 myself, but am curious about the schematic. You...
380
Ned Seith
ned@...
Jan 6, 2002 2:45 pm
Hello, The majority of stepper motors operate at 12 VDC and consume between 50 mA and 500 mA of current. There are a few stepper motors that operate in the 2...
381
Vanderhaegen Bart
bartv@...
Jan 6, 2002 2:50 pm
... into ... I've put my ASP project online. This is only a demonistration, and is not driving a K8000 card (the database isn't read, i only send read requests...
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Vanderhaegen Bart
bartv@...
Jan 6, 2002 2:59 pm
... I can't provide demonstration applications for the K8000 with a setup application, because I don't have enough webspace. (and because I'm limited in...
383
Vanderhaegen Bart
bartv@...
Jan 6, 2002 3:13 pm
But the problem is.. both LED's on the K8000 board (LD17/SCL and LD18/SDA) flash @ the same time, but nothing else happens. Hello, I've uploaded an updated...
... Right... And there is R30 and R31 of 3.3 ohm who get the full 5 Amp. P=I^2 * R (if i remember well..) P=5^2 * 3.3 P= 82.5 W R30 and R31 should be at...
386
johan@...
Jan 6, 2002 11:00 pm
... LD18/SDA) ... location of the problem). Hi, Thanks for updating, I just downloaded the file, but it still doesn't work. Tomorrow I will connect the K8000...
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Ned Seith
ned@...
Jan 6, 2002 11:39 pm
Your power calculations are correct. The maximum current through the stepper motor at any exact moment in time would be 5 A excluding inductive spikes due to...
... Makes me wonder what the heck those resistors are for anyway. But without a schematic I can't tell, of course. Besides, running 5 amps thru a 3.3 amp...
... Aha, no current through 2 coils at the same time.. Good to know, no need for extra heavt trafo :-) ... That's why i always place a diode over a relais.. ...
... Hahaha, that's a understatement :-) It just won't work with a 3.3 ohm resistor. I had not noticed it :-) I wonder how many amp's the persons who asked...
... In fig 6.1 on http://eio.com/jasstep.htm#types you see a simular circuit. With the 4 transitors and diodes in a H-bridge. But the velleman k8005 has much...
392
Ned Seith
ned@...
Jan 8, 2002 7:12 am
Hello Marcel, Without having seen the actual Velleman schematic, I would speculate that the resistors are employed to define the impedance (Z) of the circuit. ...
