Re: Stepper motor power supply
I'd try to adjust the Vref of the drivers and do your speed test again. But be warned, the drv8825 is not a good match for a 2.5A stepper. Expect it running stable at 1.8A with proper cooling.
View ArticleRe: Stepper motor power supply
Quotefrankvdh I think the "rated" supply is relative to the reference voltage at the driver, which is typically 1.9V or thereabouts. Torque is the critical spec for motors. Current determines torque....
View ArticleRe: powerlolu ordering
Did you make the order yet? I'm interested in maybe 6 or 7 of them if you are ordering over 50. Thanks
View ArticleRe: powerlolu ordering
Well Good news I have ordered about 20 boards. I now need to complete my BOM for Digikey to finish. Would you want the bare boards or the completed one? Cause i can ship out the bare boards tomorrow
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Re: powerlolu ordering
Any ways just got the boards in today and they look amazing and i also finished the bom. postimg.org Any ways please PM me on offers and such I will build a pick and place machine in 3 weeks then...
View ArticleRe: powerlolu ordering
If you have an request for silk screen color and such please let me know !!
View ArticleRe: Help with Project List
A servo would be a better idea, they know where they are position wise, but has less than 360 degree movement With this you could just tell it to move to position A to be flat and position B to empty...
View ArticleRe: DRV8825 "skipping" microsteps
I hooked it up like a dumb dumb. When I got it working, it gave me inconsistent extrusion. My prints came out worse. I'm switching back.
View ArticleRe: Help with Project List
Control a Stepper Motor using an Arduino, a Joystick and the Easy Driver [www.youtube.com] Timing code in arduino can replace joystick belt connected to hinged bowl to tilt over :S
View ArticleC Driver not fully working
Hi, I wrote a driver in C for a stepper motor and it's working beautifully with one stepper motor but horribly with another one (same manufacturer, similar characteristics). I've adjusted interval...
View ArticleRe: C Driver not fully working
Assuming that you have both coils connected correctly, then the only thing that can go wrong is that the motor has insufficient torque for the step rate (including acceleration). You can either...
View ArticleRe: Advice on motors for c-bot.
Hello! I´m looking to use this same model 17HS24-0644S with POLOLU DRV8825 driver. The guys on POLOLU said me that´s all right with using this two together. After one year from this fisrt post, do you...
View ArticleRe: Advice on motors for c-bot.
The 17HS24-0644 requires higher voltages than typical motors used in repraps. With a 12V supply, it will only provide good torque at low speeds. At 24V it will work somewhat better. You would do...
View ArticleRe: Advice on motors for c-bot.
I am running 17HS19-2004S1 stepper motors with the raps128 drivers and they never failed me. and I am running them on ~1.5A on 12v ( was planning to go to 24V but I don't see it necessary any more)...
View ArticleChoice between two steppers
Hi there. I am beginning a new delta build. After a lot of research and thinking, I designed my delta using Fusion360 and went ahead and bought all the components I need on Ebay. In the mean time. i...
View ArticleVibration at low speed
Hi, I'm in need of some advice for how to reduce vibration on my stepper motor when rotating at slow speeds. My circuitry can only provide on/off control using LM298, so I only have a 12V square wave...
View ArticleRe: Vibration at low speed
What motor are you driving? Degree per step? Steps per rotation? How many phases? What driver? What is putting voltage on each coil? Appears to be a two wire motor? :S
View ArticleRe: Vibration at low speed
Hi, Motors are: Sanyo Denki 103H7123-0710 Sanyo Denki 103-547-52500 Both 1.8 degrees per step 200 steps per rotation 2 phases (6 wires, not using 2) Voltage is being enabled with the LM298 and is...
View ArticleRe: Vibration at low speed
To reduce vibration at low speeds, you need to use microstepping. Scrap the LM298 (it's a thoroughly obsolete device) and use a modern constant current driver instead, which is what your motors are...
View ArticleRe: Vibration at low speed
Hi DC, thanks for the reply. Microstepping helps a lot, but I still think it's a bit above what I'd like. Nevertheless it's more than tolerable. I also added an increasing pulse width activation of...
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