CNC Milling DIY ,gusto kong mag-assemble, kayo ba?

[JojoD818]

natuwa ako sa o-rings.. 

bibilhan ko nga sa simplex ng neoprene o-ring para masubukan pero naka FEPM o-ring na siya as stock...

[j2sip]

These universal motors are DC motors that have field windings in series with the armature. This connection gives them high torque at low speeds. At low speeds, there is less back EMF sa armature and so the current through the field coils increase and the torque likewise increases. They work even with AC power that why they are called universal.

BTW, I like this thread. Thanks for sharing.

Yan ang naintindihan kong explanation! Salamat sir. May I get your opinion on this www.vhipe.com/product-private/SuperPID.htm
It's been getting good reviews since it was introduced.   

[motion55]

Yan ang naintindihan kong explanation! Salamat sir. May I get your opinion on this www.vhipe.com/product-private/SuperPID.htm
It's been getting good reviews since it was introduced.   

Walang akong experience using this product. However, I can comment by analyzing how I think it works and how would I do it if someone were to ask me to make such a controller. Here goes.

I think its speed control works by phase control of the AC power the same way a light dimmer works. There is a zero crossing detector of the AC power and the detector is input to the MCU. The MCU in turn fires the triac at a programmed delay depending upon a PID based algorithm.

Does it work? If you believe the user feedback, it apparently does.

What are the sort of problems to expect with this method? Phase control effectively controls the average voltage to the motor. However, the series connected universal motor is less suitable for this kind of control than a shunt connected motor. The reduced voltage to the motor will surely reduce the field current and thus reduce the torque at low speed. But this can be compensated by the closed loop feedback in the optical sensor.

One problem using an optical sensor is that it can easily be blinded in a dusty environment. Baka mag runaway ang speed pag nabulag. Sana kung double ended shaft and you can put the sensor sa taas. I would recommend using a small inductive proximity sensor that is fast enough to detect the rpm. For example, at 12000 rpm, that is a 200Hz pulse. Verify na lang sa datasheet ng sensor na kaya ng sensor that frequency.

Another problem I see is ikaw pa bahala sa enclosure ng speed controller. Not that mahirap yan but still.

[j2sip]

Yes, I think dust will be a problem if it gets to the sensor but being inside the router itself (pointed to the router shaft that is painted half-white half-black) may shield it from contamination. Again sir that explanation is very clear for us laymen:)

[JojoD818]

baka dapat sir may vacuum na palagi nakakabit sa spindle para hindi pasukin ng dust yun motor...

[j2sip]

baka dapat sir may vacuum na palagi nakakabit sa spindle para hindi pasukin ng dust yun motor...

Kaya nga pero di naman daw problem yung alikabok according sa mga users ng superPID. HAy sana December na para my bonus pambili hehehe.

BTW sir jojoD818 ang ganda ng machine mo at mga projects mo. I hope someday i can turn my machine into a moneymaking venture too, to feed my hobby. Inspiration ka ng mga Pinoy cnc'yers:)

[simplekurt]

bibilhan ko nga sa simplex ng neoprene o-ring para masubukan pero naka FEPM o-ring na siya as stock...

ganda ni2 sir

[JojoD818]

Kaya nga pero di naman daw problem yung alikabok according sa mga users ng superPID. HAy sana December na para my bonus pambili hehehe.

BTW sir jojoD818 ang ganda ng machine mo at mga projects mo. I hope someday i can turn my machine into a moneymaking venture too, to feed my hobby. Inspiration ka ng mga Pinoy cnc'yers:)

Thank you sir. Laking tulong talaga sa akin ng cnc sa pag fabricate ng pcb.

[JojoD818]

ganda ni2 sir

yup and makapit talaga siya. mura pa, basta o-ring sa simplex ako nabili...

[j2sip]

Your machine reminds me of this:
http://www.cnczone.com/forums/diy-cnc_router_table_machines/109390-my_newest_desktop_machine-28.html

[JojoD818]

wow ganda ng Z-axis! if ever in the future yan Z-axis ko ang upgrade ko pero as it is kayang-kaya pa naman ang load.

[j2sip]

wow ganda ng Z-axis! if ever in the future yan Z-axis ko ang upgrade ko pero as it is kayang-kaya pa naman ang load.

Kaya pala nya gang yung bosch laminate trimmer (model gmr1 sa atin). Affordable pa. Nadelay pala yung shipment ng box ko dahil unpassable yung ginagawang tulay malapit sa amin:( I'm itching to finish my machine before the year ends.   

[JojoD818]

Kaya pala nya gang yung bosch laminate trimmer (model gmr1 sa atin). Affordable pa. Nadelay pala yung shipment ng box ko dahil unpassable yung ginagawang tulay malapit sa amin:( I'm itching to finish my machine before the year ends.   

Nanghihinayang lang din ako dun sa linear bearings ko kasi mahal din pagkakabili ko sa eGizmo pero one of the best movements for the Z-axis talaga yan ball bearings sir kasi ang laki ng kaya load limits.

Saan po ba kayo gawi sir if I may ask? I'm from Valenzuela City. Huwag kalimutan mag pics ng assembly at post dito, para mo na kami nakasama sa pag bubuo ng machine mo.

[j2sip]

Nanghihinayang lang din ako dun sa linear bearings ko kasi mahal din pagkakabili ko sa eGizmo pero one of the best movements for the Z-axis talaga yan ball bearings sir kasi ang laki ng kaya load limits.

Saan po ba kayo gawi sir if I may ask? I'm from Valenzuela City. Huwag kalimutan mag pics ng assembly at post dito, para mo na kami nakasama sa pag bubuo ng machine mo.

Dahil din sa costcutting kaya ko pinili yung DIY approach sa halos lahat ng part ng cnc router ko. Eto siya on post #589. Driven by 2 steppers yung X axis (shorter than the Y. 2 pcs 3ft lead screws are almost $150 cheaper than 2 4ft ones). Actually yung electronics at leadscrew na lng kulang nya. Mejo may racking sa Y axis pero manenegate daw yun ng dalawang leadscrew. Pagkatapos neto gagamitin ko din siya sa paggawa ko ng router #2 na mejo tapos na din sa design stage. V-bearings naman gagamitin ko next time as linear motion.

I'm from Apayao Province dito sa Norte sir. Of course I'll be asking a lot of help from you sa pag assemble ko ng driver kit kasi ala akong alam sa electronics hehehe. MAlakas lng loob ko at mejo natututo na rin ako by browsing thru the elabs forum.       

[JojoD818]

Dahil din sa costcutting kaya ko pinili yung DIY approach sa halos lahat ng part ng cnc router ko. Eto siya on post #589. Driven by 2 steppers yung X axis (shorter than the Y. 2 pcs 3ft lead screws are almost $150 cheaper than 2 4ft ones). Actually yung electronics at leadscrew na lng kulang nya. Mejo may racking sa Y axis pero manenegate daw yun ng dalawang leadscrew. Pagkatapos neto gagamitin ko din siya sa paggawa ko ng router #2 na mejo tapos na din sa design stage. V-bearings naman gagamitin ko next time as linear motion.

I'm from Apayao Province dito sa Norte sir. Of course I'll be asking a lot of help from you sa pag assemble ko ng driver kit kasi ala akong alam sa electronics hehehe. MAlakas lng loob ko at mejo natututo na rin ako by browsing thru the elabs forum.       

Dahil din sa costcutting kaya ko pinili yung DIY approach sa halos lahat ng part ng cnc router ko. Eto siya on post #589. Driven by 2 steppers yung X axis (shorter than the Y. 2 pcs 3ft lead screws are almost $150 cheaper than 2 4ft ones). Actually yung electronics at leadscrew na lng kulang nya. Mejo may racking sa Y axis pero manenegate daw yun ng dalawang leadscrew. Pagkatapos neto gagamitin ko din siya sa paggawa ko ng router #2 na mejo tapos na din sa design stage. V-bearings naman gagamitin ko next time as linear motion.

I'm from Apayao Province dito sa Norte sir. Of course I'll be asking a lot of help from you sa pag assemble ko ng driver kit kasi ala akong alam sa electronics hehehe. MAlakas lng loob ko at mejo natututo na rin ako by browsing thru the elabs forum.       

Dahil din sa costcutting kaya ko pinili yung DIY approach sa halos lahat ng part ng cnc router ko. Eto siya on post #589. Driven by 2 steppers yung X axis (shorter than the Y. 2 pcs 3ft lead screws are almost $150 cheaper than 2 4ft ones). Actually yung electronics at leadscrew na lng kulang nya. Mejo may racking sa Y axis pero manenegate daw yun ng dalawang leadscrew. Pagkatapos neto gagamitin ko din siya sa paggawa ko ng router #2 na mejo tapos na din sa design stage. V-bearings naman gagamitin ko next time as linear motion.

I'm from Apayao Province dito sa Norte sir. Of course I'll be asking a lot of help from you sa pag assemble ko ng driver kit kasi ala akong alam sa electronics hehehe. MAlakas lng loob ko at mejo natututo na rin ako by browsing thru the elabs forum.       

Kita ko na sir, sander na may cup brush at spray paint lang katapat at ang pogi na!

Ok yan sir basta naman smooth and unimpeded action sa mga axis para walang bonding na mangyari at hindi hirap ang motor.

Further North ka pala sir. Sure game ako to help as much as I can and share my experiences sa pag build ng cnc. Daig ng malakas ang loob at masipag mag aral na diyer ang taong may doctorate o phd.

[j2sip]

Kita ko na sir, sander na may cup brush at spray paint lang katapat at ang pogi na!

Ok yan sir basta naman smooth and unimpeded action sa mga axis para walang bonding na mangyari at hindi hirap ang motor.

Further North ka pala sir. Sure game ako to help as much as I can and share my experiences sa pag build ng cnc. Daig ng malakas ang loob at masipag mag aral na diyer ang taong may doctorate o phd.

Swerte nga walang binding ang movement, smooth na smooth at walang racking except dun sa namention ko a few posts up. San nyo pala nabili yung emergency stop switch? 

[j2sip]

Kita ko na sir, sander na may cup brush at spray paint lang katapat at ang pogi na!

Further North ka pala sir. Sure game ako to help as much as I can and share my experiences sa pag build ng cnc. Daig ng malakas ang loob at masipag mag aral na diyer ang taong may doctorate o phd.

Meron na akong mga parts para sa upgrade nya kaya yung 2nd machine nalang ang bibihisan ko hehe. Salamat sir for the encouragement.  Did you use limit switches in your machine? Or meron din bang software limits setting/feature and linuxcnc?

[JojoD818]

Swerte nga walang binding ang movement, smooth na smooth at walang racking except dun sa namention ko a few posts up. San nyo pala nabili yung emergency stop switch? 

Mabuti nga sir walang binding, hate ng motor yan binding eh
Kasama nun ibang gamit yun e-stop nun nag order ako abroad.

Meron na akong mga parts para sa upgrade nya kaya yung 2nd machine nalang ang bibihisan ko hehe. Salamat sir for the encouragement.  Did you use limit switches in your machine? Or meron din bang software limits setting/feature and linuxcnc?

Of course may limit switches sir for safety. Yun mga limit switches ang "absolute" o "hard" limit. Pero meron din "soft" limit na i-set sa linuxcnc. Soft limits are ALWAYS inside Hard limits, para sa soft limit pa lang hihinto na, pero if ever maging "runaway" CNC ang makina natin, meron Hard limit na physically will stop everything.

[j2sip]

Of course may limit switches sir for safety. Yun mga limit switches ang "absolute" o "hard" limit. Pero meron din "soft" limit na i-set sa linuxcnc. Soft limits are ALWAYS inside Hard limits, para sa soft limit pa lang hihinto na, pero if ever maging "runaway" CNC ang makina natin, meron Hard limit na physically will stop everything.

Haha lalo na sa machine mo sir. 381 oz in in bipolar mode is serious business:)  And good to hear my soft limits din pala sa linuxcnc. I guess i'll have to install limit switches in mine too. Pwede kaya ang non-latching na switch para sa e-stop? Ano kaya pwede munang substitute para sa proper na e-stop switch?

[JojoD818]

Haha lalo na sa machine mo sir. 381 oz in in bipolar mode is serious business:)  And good to hear my soft limits din pala sa linuxcnc. I guess i'll have to install limit switches in mine too. Pwede kaya ang non-latching na switch para sa e-stop? Ano kaya pwede munang substitute para sa proper na e-stop switch?

Oo nga sir, kaya na nito gibain yun cnc ko eh. Excellent ang holding torque, pag naka steady siya hindi talaga kayang iikot ng kamay. Madali lang ang Linuxcnc sir, and since Linux based siya kahit mini itx na pc walang problema basta maganda lang ang latency results.

Pag nakaset sa Linuxcnc yun input pin as e-stop ang alam ko hindi pwede, kasi pag nag open and switch eh open din ang Linuxcnc.

Pero may solution diyan sir, kung normally open lang ang switch na meron ka diyan, you can wire a small relay so that it stays closed when you press your non-latching switch (your e-stop). Lagyan na lang ng isa pa switch for reset.

O diba sir solve ang problem?