low speed DC motor
- ChrisF
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low speed DC motor
Hoping the gents on this here esteemed forum can assist ...
Ek is al weer besig met n projek ... en sukkel nou so bietjie.
Die idee is om n "wiper motor" te gebruik, en dan n speed control op dit te sit.
Ek soek so 7 sekondes per omwenteling.
Klink maklik genoeg ..... yea right !!
90% van wiper motors is 50W, of te wel meer as 4A !!!!!!!!!!!!!
die tipiese entry level speed control stelsels SWEET met daai amps !!
Ek sien Bosch het ook 30W wiper motors ..... maar is nie seker waar om dit te kry nie (?)
Dit wat by die parte winkels is, het geen elektriese data op dit nie ......
voel of dit net makliker gaan wees om n sterker speed control te soek.
ENIGE IDEES WELKOM !!!!!!!!!!!!!!!!!
Ek is al weer besig met n projek ... en sukkel nou so bietjie.
Die idee is om n "wiper motor" te gebruik, en dan n speed control op dit te sit.
Ek soek so 7 sekondes per omwenteling.
Klink maklik genoeg ..... yea right !!
90% van wiper motors is 50W, of te wel meer as 4A !!!!!!!!!!!!!
die tipiese entry level speed control stelsels SWEET met daai amps !!
Ek sien Bosch het ook 30W wiper motors ..... maar is nie seker waar om dit te kry nie (?)
Dit wat by die parte winkels is, het geen elektriese data op dit nie ......
voel of dit net makliker gaan wees om n sterker speed control te soek.
ENIGE IDEES WELKOM !!!!!!!!!!!!!!!!!
- Stef
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Re: low speed DC motor
Chris, what is you application ..a spit braai?
Also what supply are you using i.e if you are powering from mains supply (AC) you could use a step down Txformer with a SCR bridge to make it DC and control the SCR bridge with a normal RC time delay circuit to achieve the phase delayed trigger. Could handle very high currents this way, however this form of control only works with AC...the SCR bridge is a variant of a solid state relay that enables one to drive a DC load due to the configuration of the SCR's
Also what supply are you using i.e if you are powering from mains supply (AC) you could use a step down Txformer with a SCR bridge to make it DC and control the SCR bridge with a normal RC time delay circuit to achieve the phase delayed trigger. Could handle very high currents this way, however this form of control only works with AC...the SCR bridge is a variant of a solid state relay that enables one to drive a DC load due to the configuration of the SCR's
Last edited by Stef on Thu Jan 28, 2016 12:33 pm, edited 1 time in total.
- louis fourie
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Re: low speed DC motor
Chris
Ek kan jou nie help nie, maar die Centurion motorhek "motor" kan dalk vir jou 'n stadig genoeg spoed gee. Ek weet glad nie watse Watt die motor is nie.
Waarmee is jy besig?
Ek kan jou nie help nie, maar die Centurion motorhek "motor" kan dalk vir jou 'n stadig genoeg spoed gee. Ek weet glad nie watse Watt die motor is nie.
Waarmee is jy besig?
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Re: low speed DC motor
Dalk 'n opsie..alhowel j soek omtrent 8 rpm? Hulle het allerhande ander motors ook.
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Re: low speed DC motor
Ek het n paar vriende wat jag en skyfskiet. Die manne herlaai self. Nou as jy die storie ken, dan weet jy ook dat n doppie net soveel keer herlaai kan word voor die brass "work-harden". Dan moet die punt eers warm gemaak word ....
Die tipiese DIY stelsel lyk omtrent so - https://www.youtube.com/watch?v=Im9lcVrP8eE" onclick="window.open(this.href);return false;
Die model werk teen omtrent 6 sekondes per revolusie - die tyd is n funksie van die spesifieke patroon en jou vlam.
'n Wiper motor is fisies lekker vir die taak. Net die amps wat onnodig hoog is. Die standaard speed control loop WARM !!! Volgende stap is om n heat-sink op te sit .... Of selfs net n "grootter" speed control eenheid te gebruik.
hoor graag watter "maak-n-plan" oplossings julle het :)
Die tipiese DIY stelsel lyk omtrent so - https://www.youtube.com/watch?v=Im9lcVrP8eE" onclick="window.open(this.href);return false;
Die model werk teen omtrent 6 sekondes per revolusie - die tyd is n funksie van die spesifieke patroon en jou vlam.
'n Wiper motor is fisies lekker vir die taak. Net die amps wat onnodig hoog is. Die standaard speed control loop WARM !!! Volgende stap is om n heat-sink op te sit .... Of selfs net n "grootter" speed control eenheid te gebruik.
hoor graag watter "maak-n-plan" oplossings julle het :)
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Re: low speed DC motor
Chris... Jy moet eintlik met arduinos en hulle vriende begin speel. Dis eintlik baie eenvoudig en daar is derduisende how-to's daar buite. Ek koop gereeld goed by die kerels: https://www.robotics.org.za" onclick="window.open(this.href);return false;
Hulle het vir jou 'n paar sterk stepper motors wat jou taak maklik kan maak. Tot een met 'n planetary gearbox:
https://www.robotics.org.za/index.php?r ... uct_id=708" onclick="window.open(this.href);return false;
Hulle het vir jou 'n paar sterk stepper motors wat jou taak maklik kan maak. Tot een met 'n planetary gearbox:
https://www.robotics.org.za/index.php?r ... uct_id=708" onclick="window.open(this.href);return false;
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Re: low speed DC motor
Agnee Johan... hierdie post van jou gaat my nou weer geld kos...JohanW wrote:Chris... Jy moet eintlik met arduinos en hulle vriende begin speel. Dis eintlik baie eenvoudig en daar is derduisende how-to's daar buite. Ek koop gereeld goed by die kerels: https://www.robotics.org.za" onclick="window.open(this.href);return false;
Hulle het vir jou 'n paar sterk stepper motors wat jou taak maklik kan maak. Tot een met 'n planetary gearbox:
https://www.robotics.org.za/index.php?r ... uct_id=708" onclick="window.open(this.href);return false;
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Re: low speed DC motor
Johan google "gloeiman". Dis 'n suid afrikaner wat hulle in die kaap bou. Kos omtrent R1300, werk baie lekker en reeds beproef.
Jy kan op Jaracal ook gaan kyk.
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Jy kan op Jaracal ook gaan kyk.
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Aint it ironic that "Common Sense" aint so common after all...
- ChrisF
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Re: low speed DC motor
Presies wat ons nou bou.Baasvark wrote:Johan google "gloeiman". Dis 'n suid afrikaner wat hulle in die kaap bou. Kos omtrent R1300, werk baie lekker en reeds beproef.
Jy kan op Jaracal ook gaan kyk.
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het klaar al die parte. Raam is gebou en geverf die hele lot.
Ek doen die meganiese deel, en n vriend doen die speed control .... en toe val die wiele so bietjie af ...
R150 vir die wiper motor
R75 vir die koekpan
R150 se speed control .... lyk my ons kyk nou na die R 350 se speed control ....
dan n klompie afval materiaal wat ek het in die garage.
Dus n R400 projek wat dalk nou so R600 gaan kos ....
PS - ek wou eers die een bou met die ou ekstra cam follower om een op n slag te laai .... maar daar is toe besluit op die uitleg in die video hierbo.
Ek sien hul "ramp" is teen n vlak hoek wat dan lekker een op nslag feed. En daai trick om die buite rand van die pan te trim voor die opening is n bakgat idee !!
Dankie !!
- Baasvark
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Re: low speed DC motor
Plesier!
Wys bietjie as hy klaar is.
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Wys bietjie as hy klaar is.
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Aint it ironic that "Common Sense" aint so common after all...
- ChrisF
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Re: low speed DC motor
uhm ja ...JohanW wrote:Chris... Jy moet eintlik met arduinos en hulle vriende begin speel. Dis eintlik baie eenvoudig en daar is derduisende how-to's daar buite. Ek koop gereeld goed by die kerels: https://www.robotics.org.za" onclick="window.open(this.href);return false;
Hulle het vir jou 'n paar sterk stepper motors wat jou taak maklik kan maak. Tot een met 'n planetary gearbox:
https://www.robotics.org.za/index.php?r ... uct_id=708" onclick="window.open(this.href);return false;
dit IS die toekoms ... maar ja, nog n projek of 5 voor ek daai goete gaan aanpak
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Re: low speed DC motor
Kan jy nie pulleys of ratte in die prentjie bring en spoed so reguleer ?
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- ChrisF
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Re: low speed DC motor
Pieter dis waar my meganiese brein begin het .....
verskillende kalibers se doppies moet korter of langer in die vlam wees. Dus is spoed beheer belangrik.
Die pulleys/sprockets voeg ook baie parte by die konstruksie ....
die regte motor en spoed beheer is makliker .... of so het die elektriese manne my oorreed .... en nou sit ek met n "struktuur" wat klaar is, en geen motor of spoed beheer nie ....
net n klein speedbump. Die man wat help met die speed control MAG MAAR ! Seker hy sal met n oplossing kom.
verskillende kalibers se doppies moet korter of langer in die vlam wees. Dus is spoed beheer belangrik.
Die pulleys/sprockets voeg ook baie parte by die konstruksie ....
die regte motor en spoed beheer is makliker .... of so het die elektriese manne my oorreed .... en nou sit ek met n "struktuur" wat klaar is, en geen motor of spoed beheer nie ....
net n klein speedbump. Die man wat help met die speed control MAG MAAR ! Seker hy sal met n oplossing kom.
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Re: low speed DC motor
Chris nog nie na die video gekyk nie maar 'n stepper motor is die maklikste maar jy gaan n beheerder Moet bou
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Re: low speed DC motor
Chris, ons masjiene in die lab is alles gewone 220 1500 rpm volt moters maar dit gebruik n inverter om die spoed te beheer presies soos nodig. Hule kan ook baie stadig loop!.
DC motors kan seker met n reostaat ook beheer word, hulle kan mos n redelike variasie hanter?
DC motors kan seker met n reostaat ook beheer word, hulle kan mos n redelike variasie hanter?
Johan Kriel
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- ChrisF
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Re: low speed DC motor
Johan dis is die basiese beginsel van n spoed beheer vir n DC motor. En juis hier waar ons nou so bietjie van n uitdaging beleef ....Johan Kriel wrote:Chris, ons masjiene in die lab is alles gewone 220 1500 rpm volt moters maar dit gebruik n inverter om die spoed te beheer presies soos nodig. Hule kan ook baie stadig loop!.
DC motors kan seker met n reostaat ook beheer word, hulle kan mos n redelike variasie hanter?
die tipiese klein DC motor trek maar 1 of 2A, en die tipiese spoed beheer is vir dit ontwikkel.
Die wiper motor idle teen net meer as 4A !!
jy kan net dink hoe warm word daai spoed beheer ..... heat sink is die logiese volgende stap, maar selfs dan gaan daai eenheid hard werk. So ons kyk nou na n "grootter" spoed beheer, wat die amps kan vat.
Ons het ook gekyk na n herlaaibare boor, met die lae spoed ratkas. Maar teen die BAIE lae spoed "hunt" die motortjies ...
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Re: low speed DC motor
Se vir jou speed control man hy moet 4 SCRs koop en konnekteer dit soos 'n diode brug. Dan het jy basies net 'n reostaat en kapasitor nodig om die spoed mee te stel. Die enigste trick is jou 12V supply moet AC wees. IMO die makikste oplossing
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Re: low speed DC motor
Of selfs beter nog....modify vir 15VAC op 'n 12V motor. Die is 'n TRIAC aan die AC kant met aparte diode brug vir die motor. Daar is 'n paar ander weergawes ook vir motors met aparte field coils ens.
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Re: low speed DC motor
and finally this project takes shape .....
friend sourced the motor and speed control.
First test run -
Back end cleaned up -
And off course the power supply comes from the one and only 4x4Direct
and the front -
Still having some feeding issues ... the odd round goes down tip first, then hooks on the threaded bar I used at the bottom .... going to have to replace this with a smooth bar so the rounds can slide back down .....
so close ....
time for a breather and to check this out with a fresh pair of eyes tomorrow ...
friend sourced the motor and speed control.
First test run -
Back end cleaned up -
And off course the power supply comes from the one and only 4x4Direct
and the front -
Still having some feeding issues ... the odd round goes down tip first, then hooks on the threaded bar I used at the bottom .... going to have to replace this with a smooth bar so the rounds can slide back down .....
so close ....
time for a breather and to check this out with a fresh pair of eyes tomorrow ...
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Re: low speed DC motor
Looking pretty good!!
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Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
- ChrisF
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Re: low speed DC motor
think I know how to sort out the feeder issue - feeder to be mounted lower (as I had it initially)
BUT then the feeder needs a short section bent down along the pan, to prevent the rounds falling out when the opening comes past ....
May get to this later today .... nou is die BRAAI tyd :)
BUT then the feeder needs a short section bent down along the pan, to prevent the rounds falling out when the opening comes past ....
May get to this later today .... nou is die BRAAI tyd :)
- ChrisF
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Re: low speed DC motor
deksils .....
that feeder is one fidly piece of pain in the butt !!
Got unit one working perfectly.
So quickly set about using the "same" dimensions for unit two .... net a demmmmm .... that feeder just would not play along .....litterally took a few hours of tweaking to get it to feed accurately and consistantly ....
easy enough to make, but you better have patience to tweak that feeder !!
that feeder is one fidly piece of pain in the butt !!
Got unit one working perfectly.
So quickly set about using the "same" dimensions for unit two .... net a demmmmm .... that feeder just would not play along .....litterally took a few hours of tweaking to get it to feed accurately and consistantly ....
easy enough to make, but you better have patience to tweak that feeder !!