Mark

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 1 week, 5 days ago

    Thanks Ryan,

    I’ll give those settings a try. I should be back to milling aluminum in the next few weeks. Going to have a little fun with wood and pvc board.

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 2 weeks, 2 days ago

    Ryan,

    its 1/4″ thick. I used a 1/8 double flute endmill.

    trochoidal milling, 2.70mm doc, 30mm/s, 2.0% step over. I feel I could have went deeper or raised the step over. For the holes I used a 1/16″ endmill. I did try a single flute endmill but within less then 5 minutes I broke it.. oops

    One thing I do notice with trochoidal is that when the…[Read more]

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 2 weeks, 4 days ago

    Just finished milling out this part here 20″x20″. Broke the job up over nights and weekends. Need to sand, clean up my mistakes then powder coat.

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 2 weeks, 4 days ago

    Manuel,

    Sorry for the delay, thought I replied.

    I find that my run time is way longer then estlcam and repetier host shows. Maybe 4x the time it shows.

    I just finished a large part 20″ x 20″ (508mm x 508mm). Just the outside cut took about 36 hours.

  • Thanks BT, I double checked all connections, everything checks out good. If I put thin cardboard betwent my touch off plate and my aluminum plate I’m milling, works fine. Must be picking up interference somewhere. I’m going to see if I can track it down or I might just rubber coat the bottom of my touch off plate. Not a big deal, just a nice to have.

  • Thanks Ryan,
    I tried that and the same result. Also double checked to make sure my aluminum plate wasn’t ground to anything.

  • I was setting up a Z touch off plate today. Have it wired to signal and ground min z endstop, alligator clip on endmill, then other wire connected to a small piece of sheet metal. I have an aluminum plate (24″x24″) attached to my spoil board. Now the odd thing is when I go to home z axis it raise then goes down a little and stops, doesn’t go all…[Read more]

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months ago

    Ryan,
    There’s a company that’s making speciality bits that takes advantage of trochoidal milling method. Think it’s a German company, need to see if I can find the link again. Wouldn’t mind trying one.

  • Hi Keith,
    I have a 40″x40″x3.5″ build with ss tubing that I mill 1/4″ aluminum with. Given my projects needs I went with that size, but defiantly would have scaled it down if I could have. I have my spoilboard built up as close as I could go to the gantry. Check out Trochoidal milling, has worked out great for myself as I was having issues with…[Read more]

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 1 week ago

    Jonny I seen a video too on the trochoidal bits but didn’t see on their website where to order them, would be interesting to try out.

    Thanks Dui, I really like your build!

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 2 weeks ago

    Thanks for the reply Johnny.
    Thanks for the advice, the guys here have been a big help as well.

    Each time I turn my machine on and cut aluminum it’s getting better, tweaking and adjusting as I learn. Just did two more parts. Trochoidal is working very well for me. I’m going to order some single flute bits to try out.

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 2 weeks ago

    Thanks for the reply Johnny.
    Thanks for the advice, the guys here have been a big help as well.

    Each time I turn my machine on and cut aluminum it’s getting better, tweaking and adjusting as I learn. Just did two more parts. Trochoidal is working very well for me. I’m going to order some single flute bits to try out.

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 2 weeks ago

    Thanks Ryan,
    20 mm/s feed rate
    .2mm/s plunge
    3 mm doc
    12,000rpm
    1/8 double flute endmill

    Trochoidal
    2% step length
    50% width
    .05mm oscillation

    I feel I can easily up the feed rate without issues, I may try 30 mm/s. but I’m happy with 20 mm/s, giving the size of my machine.

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 2 weeks ago

    Thanks Ryan,
    20 mm/s feed rate
    .2mm/s plunge
    3 mm doc

    Trochoidal
    2% step length
    50% width
    .05mm oscillation

    I feel I can easily up the feed rate without issues, I may try 30 mm/s. but I’m happy with 20 mm/s, giving the size of my machine.

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 2 weeks ago

    First successful aluminum part milled out of 1/4″ with trochoidal milling. Very very happy with the result and how well it milled overall. Still have some tweaking to figure out. Not sure why the line about 1mm from bottom. Now I need to figure out a good size for holding tabs and then work on figuring out a finish pass.

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 2 weeks ago

    First successful aluminum part milled out of 1/4″ with trochoidal milling. Very very happy with the result and how well it milled overall. Still have some tweaking to figure out. Not sure why the line about 1mm from bottom. Now I need to figure out a good size for holding tabs and then work on figuring out a finish pass.

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 3 weeks ago

    Think I jumped the gun before posting. I didn’t see anything about a good feed rate. Just watched the video Christian made on trochoidal milling. Tested a 45mm line at 20mm/s and worked nicely. Think I can bump up my feed rate more as well.

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 3 weeks ago

    Thanks guys for the replies!

    I’m going to give it another go this evening.

    Would anyone have any suggestions on settings to try out for trochoidal milling? Seems like I get crazy long mill times when setting it.

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 3 weeks ago

    Gave it another go..

    3 mm/s feed rate
    2 mm/s plunge
    .2 doc
    1/8″ double flute endmill

    It was going great then it jumped over, belts are tight. I’m wondering if my spindle can’t give enough rpm for aluminum (it’s max is 12,000rpm).hin,king it hung up and caused it to jump over.Im using…[Read more]

  • Mark replied to the topic Aluminum tips? in the forum Advice – MPCNC 7 months, 3 weeks ago

    Gave it another go..

    3 mm/s feed rate
    2 mm/s plunge
    .2 doc
    1/8″ double flute endmill

    It was going great then it jumped over, belts are tight. I’m wondering if my spindle can’t give enough rpm for aluminum (it’s max is 12,000rpm).hin,king it hung up and caused it to jump over.

    Still more…[Read more]

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