Member postings for Raymond Ascroft

Barrie just tried the 100mm square as soon as it started moving in Y m/c was making a horrendous noise and eventually stopped on the 4th side heading Y+ about 3/4 way up from comments this noise it is making is it losing steps? Martin didn't get a chance to try your prog yet computer is Acer Aspire with Windows XP bought 2nd hand for the job no wifi or internet the only thing loaded is cad/cam & Mach3. Any ideas on what to do next appreciated
Many thanks Ray

Thanks everyone I will try in morning 10mm/min was to try & see what is happening but 200mm/min too much for this m/c there was no load whilst cutting as DOC was 0.2mm to see what shape was being produced not sure about losing steps as my job was programming & machining 1st article any fault I was back programming & maintenance took over m/c until fixed

Jason set Z inhibit to 10mm and also swapped I&J for R to define circle centre with no difference when run ballscrew stopped turning. Looking at Seig parts diagram confident I could replace stepper motor but if it didn't work as plug & play I'm lost electronics might as well be written in Chinese. Notice that helpline finished now too

Just tried again & Y axis ballscrew just turned a few degrees & motor sounded like it was struggling while cutting rad it stopped as it started up the angle face although the readout showed movement of both axis the cutter returned along path of 1st cut, stopped it after about 10mm homed m/c & Y axis moved normally manually
Andrew Home posn is intersection of X & Y sides of component

Good morning all
must apologise for error it was a long day yesterday, the part is a steady for 3 x 9.0mm dia rods so corner rads are 4.5mm it is a internal right angle shaped pocket, the prog uses cutter comp G42 cutter offset right conventional mill.The cutter was originally 6mm dia hence allowance of 3mm to start comp in Y axis lines N130 & N140 tried 4mm cutter to see if giving m/c more room to move round rad would help. Line N225 above is wrong Y should be 12.5 it is 5 years since I have done a prog and had forgotten that prog can't finish with an arc so entered line manually was changed before running it. Unfortunately there is no drawing I was given X & Y projected dimensions of a right angled triangle and told to blend corners with 4.5mm rads over the phone I think sizes measured with CMM m/c. The missing lines N050-N130 are for tool no.2 a 10mm slot drill plunge cutting out surplus

Jason

DOC 0.2mm to check shape then 2.0mm, L61 Al, Brand new centre cut Carbide Garryson 4.0mm endmill, dry cut

Andrew & Barrie



N010 G0 G21 G49 G40 G17 G80 G50 G90
N020 M6 T3
N030 G64
N040 M03 S3000
N050 G00 G43 H3 Z30.0
N130 G00 X-28.84 Y14.74
N140 G42 G00 X-28.84 Y11.74
N150 Z2.0
N160 G01 Z-0.2 F10.0
N170 G01 X-53.2347
N180 G02 X-55.2074 Y20.2845 R4.5
N190 G01 X-30.8127 Y32.1831
N200 G02 X-24.34 Y28.1386 R4.5
N210 G01 Y16.24
N220 G02 X-28.84 Y11.74 R4.5
N225 G01 X-29.5 Y10.5
N230 G00 Z3.0
N240 G40
N250 G00 Z30.0
N260 G00 X0 Y0
N270 G00 G53 G0Z0
N280 G49
N290 M5
N300 M30
N310 %

Could someone point me in right direction please. Milling an internal triangle shape with 9mm corner rads with the Seig KX3 the cutter did not go round rad but returned along the path it came, when trying to cut rad the usual up & down sound of the motors was different mainly just one level sound, stopped m/c & returned axis to zero & Y axis was out by about 3mm the axis were all running OK manually but Y axis sounded a bit rough. the Mach 3 simulation showed correct path. Is there a minimum rad size these m/c's can handle it was 4mm dia cutter.

Could someone identify an abrasive sheet I obtained about twenty years ago please. It is on a thin plastic film similar to acrylic is a pale blue colour and the abrasive is more of a polish grade than an abrasive a lot finer than 1200 wet & dry. I think it was made before diamond dust became widely used.